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New Sram Force AXS Road 2x drivetrain - Please Offer Opinions What to Be Ready For

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New Sram Force AXS Road 2x drivetrain - Please Offer Opinions What to Be Ready For

Old 01-11-21, 10:52 PM
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The MuffinMan
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New Sram Force AXS Road 2x drivetrain - Please Offer Opinions What to Be Ready For

I'm almost finished with installment of the group set on my new road bike. Please tell me about your personal real world experiences with this drivetrain, positive, negative, and otherwise. I'm sitting down so have at it..... Thank you very much.
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Old 01-12-21, 03:05 AM
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Its heavy. Functions great, does exactly what it is supposed to do. I did have to use Red calipers to adapt to a post frame, they were a bit fussy at first.
I feel a little hoodwinked over the whole proprietary sizes and Dub nonsensn.leaves me feeling like I need a shower.before I ride.. The crank is a boat anchor.

Overall I'm ok with it
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Old 01-12-21, 09:24 AM
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Than you Is01 for the input. The Force disk brake rear caliper barely cleared the seat stay of the new Merida frame but it fits. I looked at what Sram requires to use their Dub cranks and BB. I do not like the idea of being confined to using only Sram product, plus I think their crank is ugly. So I stuck with 30mm BB spindle Wheels Manufacturing BB386 Evo Angular Contact threaded BB mated to 5 arm Rotor 3D alloy crank with Carbon-Ti Carboring AXS 50/37 chainrings. This is plenty of gear potential for me with the 10/28 Force cassette. Spins and shifts great on the bike stand. I've heard about frozen RD's so that's kind of what I'm expecting sooner or later. I'm not a weight freak so it's mute for me. How long you been riding it?
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Old 01-12-21, 11:52 AM
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The crank only weighs a little over 700 grams, without a power meter. The word proprietary seems to be used often and incorrectly. There are many different crank designs and none are proprietary, just different. Some think that any crank without a 24mm shimano standard spindle is proprietary. Not
so.

I have force axs on two bikes, but I want more range than sram offers. A 50/10 top gear is like a 55/11 and not what most riders need. I have used a Campy chorus 48/32 to get the same top gear as a 53/11, but I now use a shimano grx 46/30 crank with the chainline corrected with 2.5mm spacing washers. That crank is cheap, but heavy at 810 grams. I've never had a chain drop with either crank and I don't use a chain catcher.

I have set up the FD on four frames a total of six times and never had a problem. I don't use the wedge that sram suggests. I followed SRAM's video instructions. One thing to watch for is the FD moving out of parallel with the chainring when the mounting bolt is fully tightened. I only had about a 3mm clearance between the Campy crank arm and the screw at the tail end of the FD cage. After tightening, it touched the crankarm, so I had to loosen it and readjust. I had to use a flashlight to see the height window stamped in the cage.

I have also found that the new 10-36 cassette can be used with the standard RD, with a longer B screw. The wide RD does not have a longer cage or more wrap capacity. It has a longer main pivot mount to provide more clearance for the 36T sprocket.

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Old 01-12-21, 03:52 PM
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I see about 2mm clearance between outer cage and crankarm also. I will do just a little more tweak of FD as it's not quite parallel to outer chainring. I'm curious, would you mind sharing why you don't use the shim Sram recommends? Thanks for your input. I appreciate all the info I can get as I'm new to e world on bikes.
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Old 01-12-21, 04:00 PM
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On my first installation, my frame had 406mm chainstays and the tire made it hard to install, so I decided to try it without first. No other brand requires a wedge. The mounting screws are tiny. I could see them failing quickly. Altogether, not worth the trouble.
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Old 01-12-21, 04:12 PM
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I guess it works for you. The Sram video made it sound pretty important to install. It wasn't hard to do. If it fails it fails.
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Old 01-13-21, 08:28 AM
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Originally Posted by The MuffinMan View Post
I guess it works for you. The Sram video made it sound pretty important to install. It wasn't hard to do. If it fails it fails.
You asked. I'm a machinist and mechanical engineer. I think for myself. Sram will also claim that the axs chain won't work with either of the cranks I've had success with and they'll not sell a crank with a 16T difference between the chainrings, that also works fine.
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Old 01-13-21, 08:51 AM
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So what is your take on why Sram recommends the wedge and the 13 tooth max differential for the FD?
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Old 01-13-21, 04:06 PM
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The 13T difference is probably because sram can't seem to make decent shifting ramps for their chain rings. There are many complaints about chain drops in both directions, blamed on the FD, but both of my bikes with not-sram cranks work great. It makes no sense at all to design a 12 speed drivetrain to gain additional range, then take it away by not offering any cranks with a 16T difference. When I made the change to force axs, I was already using Campy 12 speed mechanical with a 48/32, but the new 10-36 cassette offered more range than the Campy 11-34.

I now have the same low gear as SRAM's wide 43/30 and more top gear with the 46 big ring. Makes sense to me. I've never read any sensible explanation for SRAM's chain ring limitation.
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Old 01-13-21, 09:21 PM
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Would a yaw chain catcher work on axs fd to prevent chain drop, at least on the inside?
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Old 01-14-21, 08:28 AM
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Sram sells a chain catcher that will fit the axs FD. No clue if it works. I've tried k-edge chain catchers and found them to be worthless.
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Old 01-14-21, 08:45 AM
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Thanks for your input Davesss. Really appreciate it.
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