Chinertown
Chinese Carbon Road Bikes => Cyclocross Frames, Wheels & Components => Topic started by: Strappacatena on August 19, 2025, 03:23:56 AM
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Hey everyone, for my LT GV201 gravel bike, I've chosen a 2x11 setup with the LTWOO R9 groupset. My main concern is that the R9 derailleur is officially limited to a 32t cassette.
I'm wondering if I can use the GR9 derailleur to run an 11-36t cassette, or if it would be better to just use a derailleur hanger extension.
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Get a Shimano GRX mechanical rear derailleur. Any of the 2x ones will work well. For a gravel bike you should use an RD with a clutch.
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SRAM doesn't even have a clutch on their MTB derailleurs, let alone a gravel derailleur. It's not like I'm taking my gravel bike to the bike park. :D :D
After doing some reading, I've come to understand that it's not recommended to use an extender on the UDH hanger. The R9 derailleur can handle a maximum of an 11-34T cassette (it seems some people have tried it and it works), and the only other option is to use a Shimano GRX RX810-RD, which also supports an 11-34T.
Unfortunately, it seems this is as good as it gets.
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the only other option is to use a Shimano GRX RX810-RD, which also supports an 11-34T.
There are plenty of reports of that derailleur easily handling _much_ larger cassettes than the official limit. I have one and use it with a 11-34T cassette (and L-Twoo R9 shifters), but I can tell that there's _loads_ of capacity left, both for larger cassette cogs, and also for overall chain wrap.
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There are plenty of reports of that derailleur easily handling _much_ larger cassettes than the official limit. I have one and use it with a 11-34T cassette (and L-Twoo R9 shifters), but I can tell that there's _loads_ of capacity left, both for larger cassette cogs, and also for overall chain wrap.
Thanks a lot for sharing that. I'll order an 11-34. :)
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The B screw on LTwoo R9 rear derailleur in my opinion completely useless. You can probably fit an 11-36t and it should work.
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The B screw on LTwoo R9 rear derailleur in my opinion completely useless. You can probably fit an 11-36t and it should work.
Can I say "what the f*ck"?
Basically, if I get the 11-36, I'll almost have every single ZTTO cassette...
I just got the 11-34, so I'll use that for a bit, and then later on I'll order an 11-36 to try it out.