SRAM AXS Gearing

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gSporco
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by gSporco

FlatlandClimber wrote:
Tue Feb 09, 2021 8:32 pm
DaveS wrote:
Tue Feb 09, 2021 8:22 pm
The force wide RD doesn’t have a longer cage either. The main pivot has been moved further back. Either standard RD will work with the 10-36. Some frames might need a longer B screw. Both have enough wrap capacity for the 10-36 and a 16T difference at the crank.
I can measure them out, but I am pretty sure, that the cage is longer!
Also: "According to SRAM, that new cassette must be used with the new longer-cage version of the Force eTap AXS wireless rear derailleur since the existing short-cage derailleur can’t handle a cassette sprocket of that size."
I know it works with the shorter cage also, just saying that it is recommended this way. Works better probably.
The Force and Red AXS Wide Cages are not longer.. They are the same cages from their original 33T max Derailleur of the Force and Red family. What makes these new RD Wide, is the Bknucle portion of the derailleur is slightly longer allowing the derailleur to be placed lower than the non wide versions.

Swapping cages will do nothing as they are the same.

Yes, on some frames you can use the Non wide AXS RD with a 36T Cassette, I have done with my Aspero with the B screw almost to the max and shifting is smooth.. Sram, does not recommend that and Im sure it would void warranty if they knew. Also, 3T blog has lots of info on 3T internal testing with testing the original Force/Red AXS 33t derailleur with the 36T cassette. Their test concluded that if using the original AXS RD with a 36T cassette, that the chain length should be sized to the 33t cassette then swap to the 36T cassette and adjust b screw; this was found to have the best shifting performance.
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DaveS
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by DaveS

Both the wide and standard RD have the same 70.5mm cage length. It's the pivot that's located further back (not down). I know this for certain because I bought the wide RD, compared to my standard model, then returned it. If sram comes out with a slightly larger max sprocket, the wide RD might be of some value, but only with a 13T difference at the crank. Otherwise, a longer cage would also be needed to increase wrap capacity.

A Garbaruk RD cage would also work to increase wrap and clearance.

Chain length should still be set with the big/big plus 1 inch method. Mine can wrap a 48/36 or a 46/36 with no change to chain length. I use a 55 inch chain with 415mm chain stays. Never set the chain length so short that it would cause damage with a shift to the big/big.

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FlatlandClimber
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by FlatlandClimber

Fair enough. Regardless. 25g saving doesn't make this an interesting part. 10-36 Red cassette for the win.
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SLH
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by SLH

So, it's OK to mix the 48/35 with the 10-33?
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jlok
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by jlok

SLH wrote:
Wed Feb 10, 2021 12:32 am
So, it's OK to mix the 48/35 with the 10-33?
No problem at all. Love this setup.
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SLH
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by SLH

jlok wrote:
Wed Feb 10, 2021 2:31 am
SLH wrote:
Wed Feb 10, 2021 12:32 am
So, it's OK to mix the 48/35 with the 10-33?
No problem at all. Love this setup.
Cheers.
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BadBoyR
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by BadBoyR

anyone running a 50/37 with 10/33? 50/37 with a 10/28 would be too difficult on the climbs locally. Currently running 52/36 with 11/28 and find the climbs taking their toll, most of my time is spent in the big ring.

DaveS
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by DaveS

A 50/10 ratio is like a 55/11. Awfully tall top gear, but any sram crank can be used with the 10/33.

DaveS
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by DaveS

Deleted
Last edited by DaveS on Thu Feb 18, 2021 8:42 pm, edited 1 time in total.

BadBoyR
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by BadBoyR

DaveS wrote:
Thu Feb 18, 2021 7:07 pm
A 50/10 ratio is like a 55/11. Awfully tall top gear, but any sram crank can be used with the 10/33.
I was suprised that canyon were offering 50/37 with 10/28 for the new aeroad. I just think that 37/28 would kill me and there was no scope to get an easier gear.

Can you forsee any other drawbacks that I haven't thought of?

Nickldn
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by Nickldn

BadBoyR wrote:
Thu Feb 18, 2021 8:19 pm
DaveS wrote:
Thu Feb 18, 2021 7:07 pm
A 50/10 ratio is like a 55/11. Awfully tall top gear, but any sram crank can be used with the 10/33.
I was suprised that canyon were offering 50/37 with 10/28 for the new aeroad. I just think that 37/28 would kill me and there was no scope to get an easier gear.

Can you forsee any other drawbacks that I haven't thought of?
Going from 11/50 to 10/50 must feel like falling off the edge of the world.........for most mere mortals totally unnecessary for all but the steepest descents. I'd go for the 48/35 cranks with a 28t cassette every time.
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CustomMetal
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by CustomMetal

I've gone for the 50/37-10/33 on my new aerobike so I can sit in the middle of the block more often, climb anything and also I can spin out a 52/11 so thought why not
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FlatlandClimber
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by FlatlandClimber

Why would going from 50/11 to 50/10 feel so bad? I mean you are shifting because you are spinning out the 50/11, aren't you?

50/37 10-28/10-33 on my aero bike, 48/35 10-36 on my climber.
Cervelo P5 Disc (2021) 9.1kg
Factor Ostro Gravel (2023) 8.0kg
S-Works SL8 (2023) 6.3kg

*weights are race ready, size 58/L.
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spdntrxi
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by spdntrxi

I have the 48/35 with 10-33 on my Moots. I find myself staying in the big ring longer which is nice overall. The 35/33 combo is basically the same as 34/32 I had before when I was running etap 11 and compact rings.
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Nickldn
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by Nickldn

FlatlandClimber wrote:
Thu Feb 18, 2021 10:46 pm
Why would going from 50/11 to 50/10 feel so bad? I mean you are shifting because you are spinning out the 50/11, aren't you?

50/37 10-28/10-33 on my aero bike, 48/35 10-36 on my climber.
Because going from 50/11 to 50/10 is a 10% jump in what is already a high gear. It's like going from 50/11 to 55/11. My perception is that is an order of magnitude higher than going from 52/12 to 52/11 which I already find to be a big jump.

Bigger jumps are less of a problem in higher gears, like 34/25 to 34/28, where you're more likely to be spinning up a slope.
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Vitus ZX1 CRS Campy Chorus 12s Bora WTO 45 disk brake wheels Zipp SL70 bars 7.5kg

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