Hello everyone,
my question is, what do I need to upgrade to GRX 12 speed from 11 speed.
My current setup is GRX 11 - 810, 2 chainrings 48/31, XTR 11-40 cassette.
Can I buy only right 12 speed GRX 820 shifter, 12 speed chain, and a new 12 speed cassette (11-36).
Will it work?
GRX 11 to 12 speed upgrade
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I think the cable pull ratio has changed.
That said, they do use a revised cable pull ratio, that according to Shimano, is officially not cross-compatible with 11-speed road or Shimano’s MTB 12-speed components
https://escapecollective.com/shimano-gr ... s-on-look/
Sounds like the 11s derailleur wont work with the different 12s pull ratio.
That said, they do use a revised cable pull ratio, that according to Shimano, is officially not cross-compatible with 11-speed road or Shimano’s MTB 12-speed components
https://escapecollective.com/shimano-gr ... s-on-look/
Sounds like the 11s derailleur wont work with the different 12s pull ratio.
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Funnily enough, the 12s derailleur apparently works on 11 speed finewarthog101 wrote: ↑Mon Mar 18, 2024 11:58 amI think the cable pull ratio has changed.
That said, they do use a revised cable pull ratio, that according to Shimano, is officially not cross-compatible with 11-speed road or Shimano’s MTB 12-speed components
https://escapecollective.com/shimano-gr ... s-on-look/
Sounds like the 11s derailleur wont work with the different 12s pull ratio.
https://www.youtube.com/watch?v=dEEe0hIMpf0
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- Posts: 917
- Joined: Wed Sep 25, 2013 10:05 am
There you go then!Treptay wrote: ↑Mon Apr 01, 2024 12:18 pmFunnily enough, the 12s derailleur apparently works on 11 speed finewarthog101 wrote: ↑Mon Mar 18, 2024 11:58 amI think the cable pull ratio has changed.
That said, they do use a revised cable pull ratio, that according to Shimano, is officially not cross-compatible with 11-speed road or Shimano’s MTB 12-speed components
https://escapecollective.com/shimano-gr ... s-on-look/
Sounds like the 11s derailleur wont work with the different 12s pull ratio.
https://www.youtube.com/watch?v=dEEe0hIMpf0
This video is the R7120 STI with R8000 GS RD
Shimano 105 12 Speed Groupset With 11 Speed Rear Derailleur
https://www.youtube.com/watch?v=9u6ntnyw5vQ
Shimano 105 12 Speed Groupset With 11 Speed Rear Derailleur
https://www.youtube.com/watch?v=9u6ntnyw5vQ