Torque settings for brake lever on carbon bars

[sg37409]

I have  shimano 105 11sp controllers on the tandem which has carbon bars.
The LH one came loose on a ride and I nipped it back up again.  Not too tight though - I don't know if it tightens a band around the 'bar or if its a bolt driven on to the 'bar itself, and being carbon I don't want to crush it.

Is there a torque setting for these ?  And does anyone know if its a band or the bolt end direct on the 'bar ?
thanks
Steve

[FifeingEejit]

Iirc carbons usually 5Nm,grip paste helps

Sent from my BKL-L09 using Tapatalk

[hatler]

I'd be astounded if the fixation method was a bolt end being brought to bear directly on the bar. Surely it's a band-on?

[hatler]

My 10spd 105 levers use bands, and they surely wouldn't have regressed like that.

[Neil C]

Latest 11 speed 105 (R7000) definitely has a band on fixing.

See Dealer Manual here - https://bike.shimano.com/en-EU/product/component/shimano105-r7000/ST-R7000-R.html

Page 12 says 6-8 N-m torque.
 
But page 10 has the note "Even with the recommended tightening torque, there is a possibility that the carbon handlebars may become damaged and insufficiently tightened. Confirm the
appropriate torque with the bicycle manufacturer or the handlebar manufacturer."

[sg37409]

Thanks people 👍

[citoyen]

Iirc carbons usually 5Nm,grip paste helps

Sent from my BKL-L09 using Tapatalk

Interesting. I wouldn’t have thought of grip paste for this purpose. I use it for carbon seatpost in carbon frame. Would it work the same for metal on carbon?

[grams]

It’s vaseline filled with sharp sand, so as long as it can dig in to one or both surfaces it ought to provide some extra friction once tightened.

[citoyen]

It’s vaseline filled with sharp sand, so as long as it can dig in to one or both surfaces it ought to provide some extra friction once tightened.

[pumpkin]

grip paste or something like 'Carbon adherance compound' sounds so much better than It’s vaseline filled with sharp sand