Quarqs crank-based power meters have become legendary for their accuracy and reliability. No mention of the throw-away crankset + power meter when you need or want new rings, no mention of the need to replace your hubs to work with XDR, coin batteries in the shifters, 10 tooth cog.the list goes on. Personally, Id probably not use this option very much, but its fun to experiment with. Campagnolos answer was to add a 12th sprocket to fill the gap in the centre of the block, which works to an extent but doesnt entirely solve the problem. Shifting is actuated by switches on the brake levers, which send a signal to the derailleurs to do their thing. Both brands' disc brakes are designed to work with either 140mm or 160mm rotors. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Lever shape is largely unchanged from the original eTap. Note:SRAM HRD shifter weights include the cables, brake hose and caliper. SRAM competitor Campagnolo might well have got to 12-speed first, but with the wireless, electronic RED eTap getting a wider revamp, which goes far beyond the fabled 12th sprocket, its taken aim at nothing less than a complete rethink of road bike gearing. Shimano is rolling out special editions for gravel and road. At first glance, the "new" SRAM Force AXS groupset looks shiny and completely new. Scope of delivery: 1x SRAM RED XG-1290 rainbow 12-speed cassette. With SRAM ostensibly leading the way with their fully wireless 12 speed eTap AXS groupsets, Shimano made steps in the same direction with the release of semi-wireless models in 2021.. Everything is geared around the 10-tooth sprocket on the cassette, and this has allowed the brand to shrink the front chainrings, pushing the extra gear range to the back. There is something to be said for just being the best out there and sometimes that requires breaking changes that screw up compatibility. FYI Heres a full list of everything you can buy as of February 2019, and theres plenty more coming. doesnt actually have a link connected to it with the list of bikes. Small vision with great execution. The combination on the new tooth patterning and increase in clearance means that shifts across the rear block are sharper than before and impeccably smooth and quiet. While it was some way behind its major competitors Shimano and Campagnolo, whod had electronic systems for years, it jumped ahead of both by becoming the first to dispense with cables and operate wirelessly. Today SRAM announces their latest RED groupset lineup, SRAM RED eTAP AXS for road and off-road. The upside is that all new products moving forward (at least for the next couple years) will be built on this platform and be cross compatible. Upon reflection, I wasnt constantly chasing that sweet spot thats so elusive on something like a 50/34 combo. The lag from the wireless protocol should be imperceptible. Many thanks!! 2023 SRAM Force AXS & XPLR groups updated with lighter, better tech. Their products are sexy and light but not on par with their price in my opinion. Heres all of our tech stories from the SRAM AXS launch event: Tyler Benedict is the Founder of Bikerumor.com. Adding an extra sprocket reduces space, which means the width of the chain must be reduced. With 48/35t chainrings, 175mm cranks, a 10-30t cassette, and hydraulic disc brake calipers, the claimed weight of a complete Rival eTap AXS group is 2,783 grams. The Force eTap AXS group is slated for April 2019, and while we dont have tech details on yet, its a good bet it, too, will use the revised gearing. SRAM Red eTap AXS XPLR drivetrain review The gravel variant of SRAM's top-tier shifting Our rating 4.0 USD $1,610.00 Rear derailleur, cassette, crankset By Warren Rossiter Published:. > Also, Ive already built 3 different bikes with the group Sign up to receive Bikerumor content direct to your inbox. They are compatible with 135mm, 142mm, and 148mm Boost rear axle spacing. SRAM Red eTap AXS 2518g / RRP 3,794 You'll save yourself around 100g by opting for Dura-Ace over Red eTap, although the latest 12-speed Dura-Ace is actually a few grams heavier than. Its set to cost 3,349 / $3,648 / 3,618 for the 2x HRD RED version we have tested over the last few months. Prior to that, Tyler launched and built multiple sports nutrition brands and consumer goods companies, mostly as an excuse to travel to killer riding locations throughout North America. Meaning, you no longer have to make front shifts, you simply press one side to go easier and the other side to go harder, then it shifts front and/or rear for you to run through the gears in the most appropriate sequence. Note:Disc brake weights do not include brake hose/fluid. eTap is the next generation, electronic shifting system from SRAM, replacing their famous mechanical shifting, the Double Tap. Real weight for the 1x Red eTap AXS full crankset including the 40T chainring is 510g. Which leads me to the last big change: Gearing. Secondly, it can change gears up or down a few sprockets on the rear to compensate for a shift at the front so that you get a similar ratio after the front shift rather than either spinning or grinding, as is typical with mechanical shift systems. Continue with Recommended Cookies, At the official SRAM AXS launch, there was a LOT to learn. So I wanted to take a minute to process all that before writing my first ride impressions of the new groups. It also has considerable weight savings compared to the NX groupset (about 300 g) and carbon and alloy crank options. In its place is a design that has both chainrings machined out of one block of material that mounts directly to the crank arms on a spline, which is a design mountain bikers have had for a few years now. Brian, thats the funny thing about writing up a part thats really good with no apparent downsidespeople assume were all paid off. That type of publicity is infinitely more effective than being the official drive-train sponsor of some random WT team. Theres a limit as to how fast you can move the chain from one cog to the next and still have it engage the teeth properly, and the multi-shift (holding down the shifter to run up or down multiple cogs at a time) is already pushing that limit. document.getElementById( "ak_js" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. A geartrain without friction? There are two mens world teams on SRAM, Trek Factory and Katusha Firstly, theres sequential; when you activate the next available gear it will automatically actuate the front derailleur to keep the ratio change even between shifts, and therefore keep your cadence steady. To obtain a copy of the manufacturer's or supplier . And its nice to have options. With the latest R9200 version of Dura-Ace released in 2021 there are more similarities between the two road bike groupsets than there were, but plenty of differences still. X-Range gearing compatible with 10-36t cassette. A Force eTap AXS group with a similar set-up weighs 2,600 grams, a difference of 183 grams. Just dont pretend that either have been hitting the others nail on the head. The rear mech will work with either a 1x or 2x system and to get around the need for a clutch on a 1x system, used to retain chain tension on rough terrain, SRAMs come up with a clever alternative, called Orbit. After a few months of testing, eTap AXS has surpassed my expectations. Orbit is a fluid damper contained within the pivot at the top jockey wheel axle. To some extent this was because of the new chain but also because of the new rear mech's oil-filler damper technology, Orbit, that prevents it from moving on hard, jarring impacts. Compatible with all other AXS components. Were a year on and availability is still sketchy, and theyve had to go back to the drawing board one hubs and cranks, after releasing them a year ago. That Trek Checkpoint is now in our offices for long term review, too, so Ill report on long-term durability and function after many, many more miles. One thing that isnt mentioned here is that the powermeter is built into the rings, thus once you wear the rings out, you have to buy a new powermeter. You can only applaud SRAM for having the courage to take on decades of accepted standards and come up with something thats not just new, but has purpose with it. For example, in the eTap AXS, the largest ring on what is effectively the double chainset has 50-teeth and the smallest sprocket is 10-teeth, which means the ratio is 5:1and the wheel will turn five times for every pedal revolution. Perhaps because they coudnt say anything positive about it Thanks again. That doesnt mean they cant be easily anticipated or quickly deduced. SRAM RED eTap AXS 12-speed and wireless, it's the ultimate in modern shifting Specifications Shifting: Wireless Braking: Disc, dual pivot rim Speeds: 1x12, 2x12 Weight: 2101g 2x rim /. Road - RED eTap AXS: SRAM Chainring Kit RED DUB Direct Mount 2-speed - SRAM Battery Charger for RED eTap | etap AXS | Eagle AXS - SRAM RED eTap AXS DUB Cran. Not so much. In comparison to Shimano's traditional gearing, the 50/37 and a 10-26 cassette is the equivalent of the 53/39 with an 11-25 cassette. SRAM Red eTap AXS rear mech and flattop chain. SRAM Red derailleurs each have their own removeable battery attached to the rear of the mechanism. Or not being able to use your wheels without swapping out parts on them? The levers offer two ports per side for SRAMs accessory blips, which allow you to change gear anywhere you like on the handlebars. All Shimano's cassettes are backward compatible with wheels with 11-speed Shimano freehubs despite having a different flange arrangement. Rival AXS rear derailleurs use a more traditional mechanical clutch. Since then, hes reviewed hundreds of bikes and thousands of other pieces of cycling equipment for the magazine and the Cycling Weekly website. The new brake rotors are the first SRAM has produced that are dedicated to the road, previously adopting designs from its extensive mountain bike line-up. . Yeah I figured, but I have to fix my bathroom and rotten plumbing first so Im like 4 months out at least. Bikerumor Copyright 2013 2023. We captured slo-motion film(watch the road video at that link)of the derailleur working its magic, showing off how it managed the chain even over terrain so rough it had the bike skipping off the ground. After three years riding the original eTap in its various rim and disc brake guises Ive been very impressed. The other really interesting part of the new AXS group is the sequential and compensating shifting options. Ive ridden Red etap and the delay in shifting was quite annoying considering this is supposed to be a top tier group its pretty lame that it shifted slower than 105. Meet Rival eTap AXS. The cassette is a masterpiece of machining, with the construction using SRAMs one-piece X-Dome design to save plenty of weight. All these sites are paid to promote therefore we cant expect them to be BRUTALLY honest because that means a blacklist from the sponsors in future. It's not a lightweight choice, but it compares extremely well with. SRAM unleashed a whole new concept of gearing and gear ratios as part of the new group, and it will almost certainly inform future products as well. Newer Post , Get early access to sales and new products, South Georgia & South Sandwich Islands (GS $). In the world of bike tech game-changing is a hyperbolic phrase that gets bandied left, right and centre. AXS app allows users to customize shift options. The spindle-based unit measures left side power and doubles it to calculate total watts. With 48/35t chainrings, 175mm cranks, a 10-30t cassette, and hydraulic disc brake calipers, the claimed weight of a complete Rival eTap AXS group is 2,783 grams. SRAM clutch mechs are fixed tension, while Shimano ones have an on/off switch and user-adjustable tension. Warranty: Multiple Warranties and/or Time Frames Apply. Rival and Force chains also use solid pins while Red uses lighter, hollow pins. That makes them more agile but less capable. From ingredients to timing, dosage to frequency, heres a quick masterclass in ride fueling and recovery that goes far beyond their products, talking through the science to help you ride harder, longer & faster! 36T: 36T=5mm / 33T=5mm / 30T=10mm / 28T=12mm (chain in largest sprocket) Cycling activity Bidex Code 202110 Category Road Main . It's worth noting though that Shimano's rear mechs also come packed full of tech, including the brand's Shadow design which is borrowed from its mountain bike groupsets. Well learn if thats true when they offer a Force/Ultegra price-level version (which they have already alluded to). You will find snaps of Warrens daily rides on the Instagram account of our sister publication, Cycling Plus (@cyclingplus). Complete Rival power meter cranksets comes in standard and Wide versions. SRAMs RED eTap AXS will also be available on a whole host of 2019 bikes with brands such as Specialized, Trek, Canyon, Orbea, BMC, Giant, Liv, Scott, Cannondale, Cervelo, 3T, Open, Rose, Parlee and Koga all confirmed. The brake/shift levers are bloody awful too. How is that possible on a decade old groupset? Ive already though about that exact thing. Plus detailed bike, kit and accessory reviews from the experts! Theyve addressed what few issues the first group had, made it faster and more capable, and its better looking than ever. Thats an example of real substance whereas much of their lineup is pure marketing. Yes, those crank arms are homely. The brake levers are aluminum, and the lever reach is adjustable so you can personalize your fit. These are then mounted onto the crank arm directly using a splined interface. Weight 169g. Enter the roll-up tool bag. Then they trickled down to the X9, X7 and X5 dual chainring cranksets. GRX Groupset total weight does not include cassette and chain. Shifting is as smooth as ever, but just the general running and operation was nearly imperceptible. At 181g for a 10-28 its light; by comparison, the existing 11-28 is 185g and a Dura-Ace 11-28 is 193g. The weight differences come down to materials and construction. SRAMs mechanical groupsets have always been an outstanding value (same functional parts across all levels), so why not save the cash for other fun things, right? Shimano Dura-Ace cassettes now offer an 11-30t and an 11-34t tooth option, with the former offering seven single tooth increments from 11 to 17 tooth sprockets, matching SRAM. While there were pavement and gravel riding opportunities, gravel was the right choice to drive home some of the key new features of the group. Newly formed Denver Disruptors NCL team to make its debut at Tucson Bicycle Classic, Paris-Nice 2023 route: demanding and hilly course awaits riders, pros were doing at least a year in advance, Improve your performance with our expert practical, nutritional and training tips, Every week get exclusive interviews, fitness tips and product reviews. Who knows, thats why we have a long term review bike/group to test. Beginners or triathletes pure gold right there! It's set to cost. What is the shift speed like? A lot to process. The SRAM RED eTap AXS rear derailleur is AXS enabled for easy personalization and designed for both 1x and 2x systems. Then theyll be cooking with gas. Shop now RED ETAP AXS HRD SHIFT-BRAKE SYSTEM The photos seem to show only the chainring and drive side crank arm. Warren Rossiter is BikeRadar and Cycling Plus magazines senior technical editor for road and gravel. Namely, the clutched rear derailleur. Weight weighed: kA. Do they work? The SRAM AXS app is used to configure its electronic groupsets. There are no wires to route through the frame, which simplifies setup. To reduce costs, there is a slight weight penalty. Battery-to-tire clearance was a known issue with the 1st gen eTap group when running anything larger than a 70040 tire. Hit both together and you'll initiate a front shift. The 13-teeth jumps were first used in their XX MTB gruppo. Whats the weight for the entire crankset? Strangely none of the reviewers thought it relevant. Plus, it applied a hard wearing shiny finish for good measure. I really appreciate the push pull on the trigger for shimano. Updated Apr-2021 (added Rival AXS 12-speed), Older Post Purchased as a standalone upgrade, the power meter spindle is $100 less than a Quarq power meter spider (without chainrings) and $470 less than the integrated power meter and one-piece chainrings used on Red AXS. Weight difference negligible. Even a 52/36 around my local roads seems to frequently leave me cross-chained. The Dura-Ace rear mech includes the battery charge port and uses the Shadow design to wrap around the cassette. Compatibility Drive: SRAM Red | Force eTap AXS 12-speed. Thats all they had available at the launch, but Ive pulled the left arm and cassette off our demo bike and added those weights to the post. But with a Force AXS group coming in April, that would be good timing. Arguably a modular PM is much more elegant. SRAM's hoods house the hydraulic brake reservoirs as well as the shifter electronics. With Rival eTap AXS, the power meter is now entirely contained within the DUB spindle, adding only 40 grams to a complete crankset. After experimenting with both automation settings, I was impressed with the sequential operation, where you can forget about front mech operations and just let the bike take care of it. Once the bike is configured, wires dont necessarily matter, though wireless if obviously superior in concept. Learn how your comment data is processed. Also, maybe Im in the minority here, but Id LOVE to know when I might be able to get my hands on a Force 24 mechanical group. SRAM Red eTap AXS This is the option for you if you want no wires Specifications Speeds: 1x12, 2x12 Chainrings: 46/33T, 48/35T, 50/37T, 36T, 38T, 40T, 42T, 44T, 46T, 48T, 50T Cassettes:. All rights reserved. The action is smoother, quieter and arguably quicker than the first generation, and its adaptability, in that you can run it 2x, 1x, or combine it with any of the new AXS mountain bike gearing launching soon, is impressive, making this an electronic groupset you could run on the road, gravel, cross, mountain and downhill. they executed that new xtr real well. I am eager to hear more of your feedback. All rights reserved. SRAM Red eTap AXS 12-speed Wireless electronic shifting Rim brake and disc brake options 10-tooth smallest sprocket requires XDR driver freehub body Orbit Fluid damper rear derailleur Power. Both are programmable with built-in Bluetooth, both are focused on disc brakes but also offer a rim brake option and both let you add an in-series power meter. Fresh graphics with subtle-yet-shiny paint catch the eye, and the one-piece chainrings and slimmer brake hoods. Wolf Tooth is working on one but its a little further out. Because the Rival power meter is spindle-based, it only reads power from the left crank arm. SRAM Red eTap AXS changed the way we think about gear ratios. > SRAM unleashed a whole new concept of gearing and gear ratios. Basically, the fluid clutch works amazingly well and, theoretically, shouldnt sap any extra juice out of the derailleurs battery. The derailleur also comes with faster pulleys, bearings, motors and signals, improving speed in every way. Last year, Merida revitalized its line up of trail and enduro bikes with the launch of the 2023 Merida ONE-SIXTY and ONE-FORTY, the former of. Rival is only available with hydraulic disc brakes. It developed a new type of freehub body the XD Driver for the dirt, which introduced 12-speed gearing to its flagship Eagle groupset, and has cleared the path for use on the road too. That means that there's a range of Red XPLR eTap AXS components, including a rear derailleur with 44 tooth maximum sprocket capacity that works with a 12-speed XPRL cassette with 10-44t range. To work out the range of a cassette divide the largest sprocket by the smallest and multiply by 100, and looking at the range of AXS the ranges are broader than traditional gearing. . The material its used is both harder and stronger, and finished in what its calling Hard Chrome. The smaller articulation angle between the chain links as they pass over an 11-tooth sprocket should also lead to lower friction, although SRAM claims that the 12-speed Red eTap with a 10-tooth sprocket is as efficient as its previous generation 11-speed system with an 11-tooth smallest sprocket. Finally the SRAM Red eTap is available to customers and the groupset weights are listed below. To be fair, I think the Eagle chainring tooth profile is a mind-blowing innovation that is as well executed as Shimanos best product. Thanks! Bath Weight: 135g; Additional contact mail (leave blank)* The problem in reducing size is that you also reduce strength, so SRAM both flattened the top and made it out of a new material that is both harder and longer wearing than its old model. Well, I only rode the one bike with the one combo, but yes, Id say so. My response was specifically regarding shift speed. table { }tr { }col { }br { }td { padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 12pt; font-weight: 400; font-style: normal; text-decoration: none; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; white-space: nowrap; }.xl63 { text-align: left; vertical-align: middle; white-space: normal; }.xl64 { text-align: left; }.xl65 { text-align: left; vertical-align: middle; white-space: normal; }.xl66 { text-align: left; vertical-align: middle; white-space: normal; }. This is something most of us do manually anyway, but now SRAM will do it for you. And it's still wireless. Also, Ive already built 3 different bikes with the group and have yet to run into compatibility problems. Integration for the sake of integration isnt smart, its self indulgent and doesnt actually serve the end user. Shimano gives you more flexibility with how this is configured, although this does increase the chances of getting a configuration that doesn't work well. Power meter upgrade (spindle only) - $249, Front derailleur (battery not included) - $175, Rear derailleur (battery not included) - $370. Already have an account with us? Its the strongest chain SRAMs ever produced, apparently. Ditto if you want to tweak your ratios. SRAMs break with traditional gear ratios has meant some radical design changes chainset included. In his time as a cycling journalist, Warren has written for Mountain Biking UK, What Mountain Bike, Urban Cyclist, Procycling, Cyclingnews, Total Bike, Total Mountain Bike and T3. Warren Rossiter (BikeRadar) has been using it about 2 months, and says in his video on it that its maybe a wee bit faster. Honestly I would not, because the existing system is still so good. First of all, lets talk about that 12th sprocket. The hoods and shifter paddles feature a new ribbed texture for more comfort, grip, and control. Force uses this same spider for the 2x system, making it easy to swap chainrings from 2x to 1x with the swap of chainrings and chainring bolts only. Rival AXS derailleurs feature the same shifting precision and reliability as their Force and Red AXS siblings. There's an 11-28t cassette in the works but still not available commercially. The bike suitable for a body size of 163-173 cm. These are then pinned together to create the 12-speed block. So Dura-Ace runs a 12-speed chain from the XTR groupset. The Rival AXS wide front derailleur is designed for smaller 43/30t X-Range chainrings on wide cranks and provides clearance for 700x45c and 27.5x2.1 tires. Most of the downsides with AXS clearly arent going to be present with a brand new drivetrain. In contrast, Shimano has stuck to cassettes that start with an 11-tooth smallest sprocket, as it claims that this is less prone to wear as a greater number of teeth are in contact with the chain. Everything from the overall AXS system that would control future wireless components from SRAM, Rockshox and more, to the actual new RED eTap AXS road group and its Eagle mountain bike counterpart. The XD driver had been adapted for the road, wth the XDR driver, which is ever so slightly wider than its off-road equivelant, allowing for a smaller 10-tooth sprocket, which opens up a whole new set of numbers to achieve even bigger gear ranges. You can also pair Shimano's Di2 mountain bike derailleur and levers with Shimano's road equivalents. You can also check battery status in the SRAM AXS phone app (see below). Sponsoring teams IS marketing. Want more? In Shimano's case these are wired to the levers while SRAM has both wired and wireless options. There are similar, less visible material choices other components. To increase the rear cassettes range it needed to have a 10-tooth bottom sprocket. Overall, the group offers a not just a refreshing new take on what a road bike drivetrain can be, but also opens the doors for some pretty amazing things in the future. This design, XDR, is close to XD (and compatible with the use of a small spacer). How has SRAM done it? Hiding under the hood, though, are a big collection of incremental running changes that have been added to both Red and Force groups over the years and finally getting codified here. Note:Di2 weights do not include wiring/junction box/battery. Rumor is the Force version will have a removable PM. Similarly, aftermarket groups should be shipping now, too, and you will need the complete groupsadly, nothing from the original eTap group will work here. Also looks pretty much like the red from far so IMHO a nice upgrade. This consistency means they only need one rear derailleur cage length, and chainring pairs are all machined as a single piece, so theyre easy to swap in and out thanks to their direct-mount design. Will that luster hold up? We found that this makes it easier to ride in a tucked aero position due to better grip. SRAM RED eTap AXS Actual Weights Road 2x (48/35 combo) - 419g with powermeter Road 1x (48t X-Sync) - 395g with powermeter Left crank - 156g Front derailleur - 165g with battery Rear derailleur - 247g with battery 10-33 Cassette - 211g Shifters - 233g/234g with coin cell batteries installed Updated Blip Box - 24g It uses the same batteries as the eTap but the design looks more robust and angular, and is also running on larger X-Sync pulleys and ceramic bearings under the surface. SRAM RED and Force AXS rear derailleurs use Orbit Fluid Dampers to prevent dropped chains and chain noise on rough roads. Even better from a value point of view is the "entry-level" Aethos Comp complete bike, which comes equipped with SRAM's new Rival eTap AXS wireless electronic groupset, a nice carbon fiber . England and Wales company registration number 2008885. I agree, the mechanical group will really help usher in their new gearing concept to the masses. Package Quantity: 1. Published 1 March 23. Shimano rarely releases duds while Sram constantly does. The Rival crankset uses polished aluminum arms that are stiff, tough, and come in a variety of lengths (160mm-175mm). The group offers 33/46 and 35/48 chainrings but not the 37/50 option. Specifications : Feature 1 Wide: tire clearance up to 700x45c and 27.5 x 2.1". While Warren loves fast road bikes and the latest gravel bikes, he also believes electric bikes are the future of transport. Even the current RED E-Tap is a pretty rare thing to find on a shop floor so its difficult for an interested rider to experience. I wasnt constantly chasing that sweet spot thats so elusive on something like a 50/34 combo. SRAM Red eTAP Groupset Weights Notes on SRAM Groupset Components All weights are taken from SRAM. 124K views 1 year ago Is Shimano Ultegra Di2 the best electronic groupset to buy in 2021, and how does it compare to its main rival, SRAM Force eTap AXS? Now theyre just bringing the model to road bikes. Yes, I might have to learn a whole new set of gear ratios, but it opens up so much potential for experimenting with gear ranges a road 1x setup with a 10-51 rear block is a real option for those mad enough to try! SRAM says that this ability to absorb water is an advantage if you do get damp in your brakes, as it means that it's less likely there will be free water droplets in the hoses than with an oil-based system, where it would boil at 100C and so potentially impact performance. Front derailleur cable routing wireless. Thats something you could have noted. They use a CR1632 coin cell each with a similar battery life of around two years. I could never willingly pay money for shimanos mehcanical mtb shifting over SRAMs. He didnt seem very convinced that it was faster. Liam Cahill / Our Media Using this, the brand is able to create a hollow crank arm while maintaining stiffness and decreasing weight. Fully wireless design with no cables, housing, or wires to manage. Thank you for reading 10 articles this month* Join now for unlimited access, Enjoy your first month for just 1 / $1 / 1, *Read 5 free articles per month without a subscription. I love my shimano road group, and when I have sram on one mtb and shimano on the other. I have a nice spreadsheet analysis, but I cant post attachments here. Ive ridden the group and theres no friction to be found. SRAM Red chainrings are machines from one piece of material so are lighter and stronger than before.
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