Rotor crank arm won’t fit the axle

Discuss light weight issues concerning road bikes & parts.
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jencvo
Posts: 78
Joined: Thu Oct 18, 2018 12:01 pm

by jencvo

I’ve been trying to help a friend install a Rotor 3D24 crankset earlier. He hasn’t had the thing on the bike I’m forever. Anyhow when we tried putting it together, the left crank arm barely fits on the axle. I tried jamming it and it only made it by a few millimeters. The thread doesn’t appear damaged at all, I applied grease to it as well. I removed the bolt completely from the crank arm but it still wouldn’t move at all.

Any suggestions?

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by Weenie


goodboyr
Posts: 1404
Joined: Wed Jan 10, 2007 10:56 pm
Location: Canada

by goodboyr

You are not supposed to remove the bolt completely. When you back it out it spreads the gap, but if you remove it completely you can damage the arm and/or split the bolt.
It's called a "DTT" bolt. It has two different threads.
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Last edited by goodboyr on Sat Apr 13, 2019 3:23 am, edited 1 time in total.

jfranci3
Posts: 677
Joined: Tue Jul 26, 2016 5:21 pm

by jfranci3

The bolt can spread the arm a bit.

jencvo
Posts: 78
Joined: Thu Oct 18, 2018 12:01 pm

by jencvo

Thank you both!!

goodboyr
Posts: 1404
Joined: Wed Jan 10, 2007 10:56 pm
Location: Canada

by goodboyr

https://velotechservices.co.uk/shop/vcl ... 7386000657



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