Duc 32 Stem with Carbon Bars - Torque?

xnofriendsx said:

Just curious is anyone is using carbon bars on the Duc 32 stem. 25.4mm.
If so what torque settings are you using for the stem?
Maverick wasn't quite too sure and told me it is up to the bar manufacturer, but i was told it was the stem manufacturer that determines the torque amount.
My response from Maverick...

"All torque for h-bars are determined by the manufacture for crush.
We do not have a recommended setting as all bars seem to be a bit different.
But, I tend to use about 40in/lb for carbon, even up to 50in/lb if it's a good brand bar!"

Anyways...
Any suggestions?

Click to expand...

Yes I did in the past before the OS stem. But it's the same, 4 to 5 N.m, Ethan is right, 40 to 50 in/lb

This is good info as I just ordered some easton carbons. I have ridden others DUCs with carbon bars, but the last person did not have them tight enough and it rotated a bit in the stem which was sketchy.

http://www.ritcheylogic.com/dyn_prod.php?p=05-252-100&k=97993

The above link takes you to an inexpensive torque wrench that is a great addition to your tool box for just such a need.

/\ that Richey tool blows.

Step up and buy the Shimano Pro clicker wrench with bits & blow case for $100

banks said:

/\ that Richey tool blows.

Step up and buy the Shimano Pro clicker wrench with bits & blow case for $100

Click to expand...

$100 for a torque wrench. You must be talking about a MTB tool. Anything slapped with MTB in the product must be tripled in price. MX jerseys....$15, MTB.....$45. And so on...

I'll stick with my cheapo torque wrench rigged up to work with allens. Has worked great for years.

Thanks for the info though guys!

xnofriendsx said:

$100 for a torque wrench. You must be talking about a MTB tool. Anything slapped with MTB in the product must be tripled in price. MX jerseys....$15, MTB.....$45. And so on...

I'll stick with my cheapo torque wrench rigged up to work with allens. Has worked great for years.

Thanks for the info though guys!

Click to expand...

Tork Wrench is essential in our toolboxes, not only for carbon parts. I have two Facom from 0.5N.m to 25N.m with all kinds of tools and can't imagine working without them.

The odds of over torquing your stem on a carbon bar & crushing it ain't so high. Those puppies are designed for the forces exerted when you hit bumps w/ stiff arms. But you need a torq wench because a 4 bolt face plate stem requires only 5nm of force to properly hold the bar in position. More importantly, the wrench puts equal force on all 4 bolts. If there's unequal force on any of those bolts, you have a stress riser on this aluminum part & the uneven force could snap the face plate & render your stem useless. I hate it when that happens. The deft touch of a skilled mechanics wrist & hand is worth way more than a Snap - On torque wrench but we don't sell them cheap.

I have Easton carbons in my OS stem, and I just snug them down firmly as I have done with carbon and other bars for many years. Calibration of the hand.