TransAm
Well-Known Member
A gearing option to consider and to determine whether it would work. I considered it but didn't go that route because individual parts were not available at the time.
Rotor 12 speed cassette 11-36 with SRAM AXS 12 speed for rear derailleur. Zinn would be the person who would know if the spacing is correct on the cassettes, I suspect it is fine. Search Velonews. I thought one benefit is you can use non-xdr cassette driver wheels, one tooth jumps, more efficient chainline, and larger chainring/cog combinations is also more efficient by a couple watts. The AXS RD is rated to 33 teeth. My 11S etap RD is rated to 28 teeth, lots of people run a 32 cog. Some velomobile racers run a Rotor cassette because the custom rear wheel axle and driver cannot handle XDR body and they need wide range, typically running 61/36 and 11-36. There is a way to kludge a 10T in there. But the FD is mechanical and takes some fiddling
Now I'm thinking of going SRAM Eagle AXS 12-speed 52t 1x with an 11-52t for general training with hills. That still gives 1:1 granny gear, but with 2t jumps in the middle. For Sebring, I'd probably use a bigger chainring and/or a smaller cassette (still want a low gear for the hills on the short loop to avoid cramping).
I could go Red 11s 2x, which is still available, but long term support is not a given, and the shifters are not compatible/upgradable to AXS. But they are available cheap 2nd hand now....