How to increase cassette teeth on an LTWOO R9

[Strappacatena]

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.

[raisinberry777]

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.

[Strappacatena]

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.

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.

[hsaus]

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.

[Strappacatena]

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.   

[jonathanf2]

The B screw on LTwoo R9 rear derailleur in my opinion completely useless. You can probably fit an 11-36t and it should work.

[Strappacatena]

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.