Shimano R8000 shifter and long cage rear derailleur questions

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Catagory6
Posts: 612
Joined: Thu Feb 09, 2017 2:36 am

by Catagory6

Can the r8000 rear handle an 11-36 sprocket spread?

Or does the r8000 shifter work with a grx rear?

by Weenie


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jch3n
Posts: 199
Joined: Fri Jul 22, 2016 8:34 pm

by jch3n

Yes to both.

Shimano tend to be conservative with max cog guidelines (which makes sense). Short cage can easily handle 11-32, if not 11-34, meaning long cage should handle 11-36 just fine.

I have r8000 shifters with GRX rear on my gravel bike. Can confirm that also works fine.

Catagory6
Posts: 612
Joined: Thu Feb 09, 2017 2:36 am

by Catagory6

jch3n wrote:
Tue Aug 09, 2022 12:03 am
Yes to both.

Shimano tend to be conservative with max cog guidelines (which makes sense). Short cage can easily handle 11-32, if not 11-34, meaning long cage should handle 11-36 just fine.

I have r8000 shifters with GRX rear on my gravel bike. Can confirm that also works fine.
thanks

CampagYOLO
Posts: 705
Joined: Thu May 06, 2021 3:58 pm

by CampagYOLO

Yep and I've done it myself on a gravel bike with a 2x set up.

I've got r8000 long cage rear mechs running fine with an e*thirteen 9-39 cassette on a 1x set up with no additional hardware such as a roadlink.

renoracing
Posts: 139
Joined: Tue Mar 27, 2012 2:48 am

by renoracing

Yup... I'll echo the above sentiments. The only thing worth noting, that'll become obvious when you set it up, is that depending on the front chainring's tooth differences(ie 16t in a 50/34 setup), you'll end up with a saggy chain in the bottom couple cogs of the cassette, while in the small ring. It's a neccessary evil of setting the chain long enough to allow big/big crosschaining.

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satanas
Posts: 315
Joined: Sat Jul 04, 2020 5:45 pm

by satanas

36T is fine with a long cage (even with 5800GS/6800GS), and 40T will often/usually be okay on Shadow RDs with appropriate chain length and B-tension adjustment; I've done both successfully. With an Ultegra RX RD 42x27 + 11-40 was fine and all gears had okay chain tension with a tiny bit in reserve, not that I used the extreme crossover ones, except by accident.

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