Di2 1x10/11 Hack, will this work?

Discuss light weight issues concerning mountain bikes & parts.

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Toorqs
Shop Owner
Posts: 43
Joined: Mon Sep 21, 2009 7:35 pm

by Toorqs

Im putting together a new 29" build for 2013 that hopefully will consist of:

Shimano 9070 rear derailleur
XX1 crankset with 32 or 34 ring
11spd 10-42 XX1 cassette or 10 spd Ceradure 11-36 cassette
Seatpost battery
TT shifter with custom clamp

Basicly im wondering if it is possible to:
a) run the 9070 derailleur with a 10spd cassette, and what kind of cage replacement it would need if any
b) fit a XX1 cage to the 9070 dearailleur to use a XX1 10-42 cassette

dhphat
Posts: 20
Joined: Thu May 22, 2008 6:04 pm

by dhphat

a) run the 9070 derailleur with a 10spd cassette, and what kind of cage replacement it would need if any?
won't work and its function of the cpu/ shifter not the derailleur.
b) fit a XX1 cage to the 9070 dearailleur to use a XX1 10-42 cassette?
not possible, and the issue isn't the cage in this case. Its the placement of the cage on the derailleur.
Rapha cycling's Ed Hardy

thisisatest
Shop Owner
Posts: 1980
Joined: Sat Jun 13, 2009 4:02 am
Location: NoVA/DC

by thisisatest

Closest thing you can do is get k-edge to make a ki2 using an ultegra rear derailleur. 9070 will not work with 10speed, but a 6770 rear derailleur on an otherwise 9070 group will shift 10speed. Ki2 conversion is a custom cage with a carefully placed upper pulley offset, and I believe at least one tension spring is different.

Toorqs
Shop Owner
Posts: 43
Joined: Mon Sep 21, 2009 7:35 pm

by Toorqs

ok, thanks for input.

I guess it would be less hassle to do a stock Ultegra DI2 derailleur with a 11-32 and run a 2x10 front. Or could i get this to work with a 34 or possibly 36 cog?

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