P.S.A: Shimano Ultegra 8000 Chainset

Discuss light weight issues concerning road bikes & parts.
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Ginsterdrz
Posts: 37
Joined: Sun Jul 08, 2012 1:16 pm

by Ginsterdrz

According to GCN and Shimano it's NOT backwards comparable with 6800.

Big mistake in my eyes. After the debarkle with the 6800 cranks snapping, I (along with many others) would like to upgrade.

Anyone tried it to prove Shim wrong???

moyboy
Posts: 164
Joined: Thu Aug 18, 2016 12:19 am

by moyboy

Has to do with the crankset chain ring spacing is different. About 0.4 less, so you'll need to use the new Front Derailleur.

Thenuge
Posts: 99
Joined: Wed Jun 21, 2017 1:37 pm

by Thenuge

moyboy wrote:Has to do with the crankset chain ring spacing is different. About 0.4 less, so you'll need to use the new Front Derailleur.


Yea I saw that and can't remember the benefit. Was it that it allows for less cross chaining or something?

jih
Posts: 129
Joined: Fri Jan 29, 2016 12:54 pm

by jih

It's supposed to allow shorter chainstays.

In practice it'll probably not actually be incompatible for most people. 0.4mm isn't very much.

Nefarious86
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by Nefarious86

Yo do realize there are plenty of topics on this already and that there are plenty of users doing the mix and match without issue. 0.4 is less than half a turn on a limit screw.
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wingguy
Posts: 3822
Joined: Thu Mar 08, 2012 11:43 pm

by wingguy

Ginsterdrz wrote:According to GCN and Shimano it's NOT backwards comparable with 6800.

Since this was already covered with 9100 vs 9000 (and 8000 is just slightly heavier 9100) why would you expect it to be any different?

morganb
Posts: 533
Joined: Wed Mar 15, 2017 5:30 pm

by morganb

Does anyone know if this is in the cranks or the rings themselves? I am likely going to be getting a Power2Max 110 asymmetric to run Shimano rings and wondering if 9100/8000 rings would shift worse with a 9070 FD.

jih
Posts: 129
Joined: Fri Jan 29, 2016 12:54 pm

by jih

It's 400µm. Quit worrying and ride your bike.

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