Quick BB Question

blablablacksheep

Got a new chainset installed on April 30th apox and i think i correct in saying that i need to re-tighten the non-drive side crank arm pinch bolts again ?

Is this correct and if so how much should i re-tighten non torque wise, as i dont have torque wrench at hand just want to know apox how much to re-righten the pinch bolts.

pictures included.

http://imageshack.us/photo/my-images/845/dscf0609t.jpg/
http://imageshack.us/photo/my-images/109/dscf0610z.jpg/
http://imageshack.us/photo/my-images/68 ... 611oy.jpg/

cheers

nicklouse

why do you think you need to tighten them?

blablablacksheep

nicklouse wrote:

why do you think you need to tighten them?

Like i said in post i thought you supposed to re-tighten the pinch bolts after a few rides/weeks after the chainset was installed.

also from the picture 1 it does show a gap which i can move the plastic plate within it.

Is this wrong then about needing to re-tighten the pinch bolts after installing a new chainset then?

just not 100% if non drive side might come loose ect.

nicklouse

yes there should be a gap. yes the plastic bit can be lose.

yes it is advised that you re torque the bolts. but you need a torque wrench for that.

but if they have not loosened then they dont need tightening. but you can not know that without a torque wrench.

so there is no answer to your question.

re torquing is not the same as re-tightening.

cooldad

By gap, I'm assuming you mean the end of the crank where the pinch bolts are. Tighten that up so there is no gap and you will end up with stripped cranks and/or pinch bolts.
The plastic plate is loose, it just fits in a hole in the axle and needs to be lifted if you want to take the crank arm off.

cooldad

The perils of having too many threads open once again.

blablablacksheep

nicklouse wrote:

yes there should be a gap. yes the plastic bit can be lose.

yes it is advised that you re torque the bolts. but you need a torque wrench for that.

but if they have not loosened then they dont need tightening. but you can not know that without a torque wrench.

so there is no answer to your question.

re torquing is not the same as re-tightening.

ok so bassically there is no point doing anything unless have a torque wrench :roll:

Is there any way i can check or tight tthat would let me knof they might need to be re-torqued by the LBS then?

nicklouse

blablablacksheep wrote:

ok so bassically there is no point doing anything unless have a torque wrench :roll:

Is there any way i can check or tight tthat would let me knof they might need to be re-torqued by the LBS then?

correct. unless they are that lose they are falling out.

cooldad

I use 'finger' torque. Without straining:
Tiny bolts, use one finger.
Bigger bolts, use 4 fingers.
Bigger bolts use hand.
Bigger bolts use wrist.
Bigger bolts use forearm.
Big mother bolts use arm.
Big mother****** bolts use body weight.

Never stripped one or had anything come loose.

But it is a judgement call.

Those I would use 4 fingers.