MTB cassette on a road freehub

Discuss light weight issues concerning road bikes & parts.
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TonyM
Posts: 3252
Joined: Thu Jan 22, 2015 4:11 pm

by TonyM

Which spacer do I need to use in order to get a Shimano 11 speed XT cassette on a Shimano road freehub?

1.75mm, 1.85mm, 2mm??

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silvalis
Posts: 678
Joined: Mon Sep 07, 2015 1:02 am
Location: Aus

by silvalis

1.85mm
Chasse patate

by Weenie


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Maximilian
Posts: 300
Joined: Tue Apr 26, 2011 8:09 pm
Location: Warwickshire

by Maximilian

I used a 2mm spacer to fit a Shimano Deore XT M8000 cassette (11-42) with an Ultegra RX800 derailleur. I needed a Wolf tooth road link too. Shifting isn't lighting fast but then I never expected it to be. If I used more reasonable chainrings it'd be better but I wanted the range that 50/34 gave (do it all bike for Portugal, loads of stupid steep single-track). If you do something weird like me you'll need a looong chain or a section you can add in with quicklinks

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alanyu
Posts: 80
Joined: Thu Jun 06, 2019 1:10 pm

by alanyu

I used a 1.85mm spacer to mount 11-42T cassette on my touring bike with RS500 wheelset and ltwoo 1*11 shifter. It works perfect

CharlieBravo383
Posts: 7
Joined: Sun Sep 09, 2018 2:27 pm

by CharlieBravo383

I cant recall exactly which spacer it was that i used, but I’m almost certain it was the 1.85.
I’m running a 11-42, 52-36 setup with oval rings, with roadlink, and di2. Shifting is superb - and generally pretty fast, though drop down from largest cog to the middle of the cassette is sometimes a bit jumpy. Mostly due to the longer chain. I curbed that by shortening it and adjusting synchro-shift to never allow the big-big combo of gears to ever happen.
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Maximilian
Posts: 300
Joined: Tue Apr 26, 2011 8:09 pm
Location: Warwickshire

by Maximilian


CharlieBravo383 wrote:I cant recall exactly which spacer it was that i used, but I’m almost certain it was the 1.85.
I’m running a 11-42, 52-36 setup with oval rings, with roadlink, and di2. Shifting is superb - and generally pretty fast, though drop down from largest cog to the middle of the cassette is sometimes a bit jumpy. Mostly due to the longer chain. I curbed that by shortening it and adjusting synchro-shift to never allow the big-big combo of gears to ever happen.
Maybe I should get hold of a 1.85mm then to see if shifting improves. Di2 will definitely play a part in it though

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CharlieBravo383
Posts: 7
Joined: Sun Sep 09, 2018 2:27 pm

by CharlieBravo383

Is that Box Hill in your avatar? I thoroughly enjoyed the ‘climbs’ on the Prudential this year, and with 11-42 its a piece of cake... not the fastest by all means, but definitely easy.

If i remember correctly the first time i tried the larger cassette i had a problem with the rear derailleur not being able to get into the largest gear, and i tried to tweak the bejaysus out of the screw, until i realised that i needed a spacer. Problem solved. I have a duplicate setup on my bike in Cape Town, also 11-42, with roadlink, but different frame, and i think i have a very slightly bent hanger as i struggle to get into 52-11, though getting up to 36-42 is no problem. Same spacer used.

Enjoy!

by Weenie


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