Fitting carbon handlebars without a torque wrench...any tips
Jeast
Posts: 176
Or should I not attempt it? Read some horror stories about snapped bars and the injuries that ensue!
0
Comments
-
If you can't judge torques, then get a torque wrench to be on the safe side.0
-
Also, would you recommend that i use any of the special carbon component assebly grease or will the rough finish on the Ritchey bars be enough to prevent slip?0
-
Have a look what Ritchey say - it varies for different products.0
-
Best to use carbon paste. If you really cant borrow a torque wrench off someone, then tighten it up until you cant rotate it. Then ride. If it slips, tighten it up a little bit more. Repeat.0
-
Was asking myself the exact same question a few weeks ago. Rather than getting full torque wrench, how about a Ritchey Torque key ? Got mine from LBS for £9.99 or something like that and ideal for stem, etc etc
http://www.chainreactioncycles.com/Models.aspx?PartnerID=79&ModelID=394782010 Specialized Stumpjumper FSR Expert Carbon
2014 De Rosa R848
Carrera TDF Ltd Commuter0 -
If you've got a set of small weights you can replicate it sort of.
Torque in Nm (ie force * distance from pivot (centre of bolt))
Acc due to gravity 9.8 or there abouts
so 1 kg generates 9.8 N force vertically down.
4Nm would be 1 kg at 4Nm/9.8Nm = 0.408m
so the 1kg needs to be 40.8cm from the bolt centre
2kg needs to be 20.4cm
4kg needs to be 10.2cm
etc.
Bear in mind this force (towards ground) has to be applied tangentially.0 -
Torque in Nm (ie force * distance from pivot (centre of bolt))
Acc due to gravity 9.8 or there abouts
so 1 kg generates 9.8 N force vertically down.
4Nm would be 1 kg at 4Nm/9.8Nm = 0.408m
:shock:
Torque Key it is.0 -
If you want a torque key, I've got one I'll post to you along with a few different sized bits for it.
All I ask is that you post it back when you're done.
PM me your address if you want it.0 -
Jeast wrote:Torque in Nm (ie force * distance from pivot (centre of bolt))
Acc due to gravity 9.8 or there abouts
so 1 kg generates 9.8 N force vertically down.
4Nm would be 1 kg at 4Nm/9.8Nm = 0.408m
:shock:
Torque Key it is.
I have a torque wrench. :!:0 -
Cat With No Tail wrote:
If you want a torque key, I've got one I'll post to you along with a few different sized bits for it.
All I ask is that you post it back when you're done.
PM me your address if you want it.
Ah, thanks for the offer No Tail, very kind...but I'll probably just buy one, since it llooks like I'm going to need to have one anyway. I might even buy a torque wrench if I can find one cheap enough.
Thanks again.0 -
Good plan, it's a handy tool to have anyway.
Despite the fact that those Richey torque keys say they only work with the key that's fitted, you can take it out with a pair of plyers.
To be honest, I'd go for a proper torque wrench if you can, worthy investment.0 -
It's well worth investing in a torque wrench. I rounded a thread on a bolt once, luckily it wasn't owt serious but it made me see the light.
Got one of these http://www.chainreactioncycles.com/Mode ... elID=37294
You can get them cheaper. I use mine for a broad range of jobs on and off the bike. I have too many expensive bits on my bike to get it wrong and have to replace them!Niner Air 9 Rigid
Whyte 129S 29er.0 -
If you can afford some Ritchey carbon bars, a torque wrench is a small investment.0
-
-
Total non problem - just do it up till it feels tight, without going apeshit and trying to bend the hex wrench.
It's really not rocket science. Never had any problems whatsoever with mine (and my stem is an old single bolt job).0
