I"m trying to build up a new gravel bike that will give me the best climbing ratio while using a force etap 33-46 chainring ( i cant do 30 because I want force power meter). I’ve been trying to research if I can use a 42 tooth cassette (xplr) with the force chainring. Has anyone tried this? I’d be fine with a 40 tooth…but don’t think Sram has that cassette?
Some people have been trying it on weight weenies
they make a 10-36 from memory? feel like even that ratio would be overkill with a 33 chainring for a gravel bike, unless you’re lugging cargo etc.
I live in the mountains and don’t have a huge engine, so for you maybe overkill, for me… not so much
I talked with a SRAM tech at SBT GRVL and he said no go. But they said my original 10-33 derailer wouldn’t work with a 10-36 cassette, it does. Id like to hear if there is a way to make it work.
The largest officially supported cassette is the 10–36. As far as I know Rotor makes a 12-speed 11–39 cassette that is compatible with the WIDE rear derailleur, although it is not officially supported. I have no idea whether someone has tried to use that cassette with a front mech, though.
Another option to explore (no pun intended) is a 1x setup with a 10–44 cassette.
Yeah, I heard the same, but opted for a WIDE rear derailleur when I got my bike. IMHO SRAM should just kill off the normal rear derailleur, I don’t think many people will miss the 10–26 cassette.
There is too much chain to take up with that combo. A 33 chainring and 36 cassette is pretty favorable gearing though. It’s almost the same low gear as what I run for my 1x gravel setup (42 chainring and Eagle 10-50 mtb cassette). Once the cassettes get to a point, you really can’t run 2x because the chain length difference between a small/small and big/big combo gets too extreme. Your RD would need to be so long that it would practically be dragging the ground (Eagle RD’s are pushing it already just with 1x).
I’m running the standard 33t max rear mech with a 10-36 cassette with no issues.
That’s good to know, thanks!