1

I have a GRX RD-RX810 rear derailleur and I need a compatible (thumb) shift lever for flat bars.

Any suggestions which shifters are compatible for my setup?

6
  • I'm amazed that this isn't a duplicate, as GRX is basically a wide-ratio road drivetrain, and Shimano road and MTB 11 speed kit isn't directly compatible. While I think that's been discussed here before, I can find it.
    – Chris H
    Commented Nov 22, 2023 at 9:18
  • Yo puedo leer un poco español, pero esta pregunta no es muy facile para un novicio. ¿Timón = manillar?
    – Chris H
    Commented Nov 22, 2023 at 9:29
  • @ChrisH What about these? Looks like 105/11-speed-compatible thumb shifters, should have GRX-compatible pull-ration, or am I wrong?: link
    – DoNuT
    Commented Nov 22, 2023 at 10:41
  • @DoNuT good find. I think they ought to work. I haven't worked with GRX (my gravel bike is 105 2×11) and I stopped thinking much about drivetrain compatibility between road and MTB series when I bought that bike - it's through-axle and my other bikes are QR.
    – Chris H
    Commented Nov 22, 2023 at 10:45
  • 1
    @DoNuT That works: cube.eu/ch-en/cube-nulane-race-fe-rubyred-n-black/…
    – Rеnаud
    Commented Nov 22, 2023 at 10:51

2 Answers 2

4

The other answer has already a specific product, but i wanted to answer in a more generic way for people with a similiar issue and maybe not the exact same product :)

You can find official compabilitly list of all shimano components at

https://productinfo.shimano.com/#/

You need to know which specific version you have. (not just RX810, but also 1x11/2x11 etc.)

In the compability chart, look for Shifters with the SL prefix.

SL = flat handlebar shifters

ST = drop handlebar shifters

For your case, you most likely you can use shifters from the 105 series and there was a limited edtion GRX specific flat handlebar shifters.

1
  • I didn't want to do product recommendation (since SL-U5000-R seems to be the other option if you ignore TT bike bar-end shifters) but yours is probably the better overall answer. It would be great if deep-linking into the compatibility chart would work.
    – DoNuT
    Commented Nov 22, 2023 at 12:18
3

Shimano offers thumb shifters that are compatible with 11-speed road groupsets

https://bike.shimano.com/en-US/product/component/105-5800/SL-RS700.html

I haven't checked if there is a newer iteration of the product since 105 R5800 is out for a few years but they've been used on flatbar GRX bikes, as an example: https://www.cube.eu/ch-en/cube-nulane-race-fe-rubyred-n-black/cb9372bb50c65be2c045a3ed7996cbb7

Edit As out also mentioned in the other answer, scrolling to the 11-speed section of the road rear drivetrain compatibility chart lists these (and SL-U5000-R) as the current options. SL-prefixed components is what you have to generally look for. ;)

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.