What shifter clamp torque with carbon handlebars?

Discuss light weight issues concerning road bikes & parts.
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vinuneuro
Posts: 103
Joined: Mon Mar 06, 2017 10:34 pm
Location: Chicago

by vinuneuro

The Easton instructions say to use the torque spec from the shifter manufacturer. Shimano specs 6-8 Nm (53-70 inlb). Seems high for such a small surface area.
'16 Spec Diverge Expert

by Weenie


Alexandrumarian
Posts: 164
Joined: Mon Mar 28, 2016 6:34 pm
Location: Romania

by Alexandrumarian

Just trying to guess from last years memory, Campy manual says 7nm. I got very thin (scarily so) walled high modulus bars and stopped at 4, maybe 5, with plenty of paste in the mix. They did not move since and I am very heavy. I guess tighten to 4, lean on them, tighten more if needed...

alcatraz
Posts: 969
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

Park tool on youtube goes the safe way (imo) and recommends to only use the torque you need. Tighten the clamp and try to push the shifter sideways. As long as it doesn't "easy" move sideways it's the right torque.

/a

AfromD
Posts: 23
Joined: Mon Feb 20, 2017 11:46 am

by AfromD

Shimano says 7nm for Dura Ace shifters. Probably for the rest as well. Since I also rest my weight on the shifters, a secure fixation is more important to me than the risk of damage to the bar. So I tightened them to that spec. On my MTB, however, I have them much looser, so that they hopefully will twist away in event of a crash.

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