Torque Wrench

[Dirtbreath]

Have just invested in a fancy torque wrench and want to go through my bike this weekeknd (basically just play with my new toy). I found these recommended specs on the Yeti website (in lb.inch) but want to know what to tighten a stem onto carbon bars and also bar ends. Another one is the water bottle cage mount.

Torque Specs

Pivot Bolts

125 -150

Derailleur Hanger Bolts 30 -45

Handlebar Binder Bolt

150 -180

Stem Binder Bolt

175 -260

Seatpost Binder Bolt

150 -180

Saddle Clamp Bolts

175 -250

Rear Derailleur

70 -86

Front Derailleur Clamp

45 -60

Chainring Bolts

88 -132

 

Go to the part manufacturers site and get it there. A frame manufacturer can not tell you how tight to make your stem.

 

 

 

 

Easton site not much help. Bought used so didnt get a manual.

[wisecrack]

lol...I also don't know if you can order them or just go to a hardware shop and buy more sizes. They have a locking bit that keeps them attached to the wrench so I do not think all types will fit.

 

Noticed my seat clamp needs a size that's not included.

 

[Slowbee]

mmmm wisecrack, thats what worries me, so I am looking for something that you can add bits and pieces as and when required

 

 

[Cicada]

 

 

I can supply a product that is manufactured by a comp that also produces for Teng Tools. It really looks identical to the Teng product

5Nm - 20Nm

Have been using one for years and is totally up to the job

I've got 10 in stock

Price R 450.00

 

Cicada2008-06-26 05:08:30

[Slowbee]

cicada,you have a pic or wbsite to go look at?

 

 

[Johan Bornman]

Mmmm... interesting topic. What would be the most critical bolts that need proper torque?

 

The most critical one where common sense doesn't give you any guidance is the bolt on a taper spindle BB.

 

As for all the other bolts on a bicycle, common sense combined with a bit of experience and a good hand is all you need. For bolts in carbon, use a short, dainty spanner and hold it on the head rather than on the handle. This will ensure that your strength is diluted and that you don't brutalise the bolt.

 

The cassette lockring also requires a fair bit of torque but is very, very forgiving and your error could be quite large and it'll still be perfectly OK. Nice thing about this lockring is that you can teach yourself the perfect torque by counting the number of krrrrs the ring makes at it tightens. If you memorise the melody you can get it torqued to 5% accuracy using a standard spanner.

 

Dont use a large mechanic's socket ratchet with adapter onto adapter to bring the socket size down to 6mm and then apply force to any little bolt, especially bolts in carbon, copper, brass and aluminium. Your inflated sense of strenth and machismo will strip the little bolt.

 

In Afrikaans you could say that route would "verkrag" the bolt but the direct translation of "rape" doesn't quite have the same meaning.

 

If you can't afford a torque wrench or just don't want another set of toys in your garage, borrow one....actually two, a big and small one. Tighten the square bit into a vice and teach your brain the difference between 6nm and 50nm. Get used to how the length of the lever affects feel. Once you have that ingrained in your mind, you've saved yourself R2000 rand.

 

If you want to see how not t use a torque wrench, go have your tyres rotated at one of those tyre places and ask the attendant to torque your nuts...the wheel's nuts, to 50nm. Spot the look on his face. But even if he knows what you're talking about, watch his technique. He'll turn until he hears the click and then continue turning until the spanner bends or car shoots off the ramp - whichever comes first. They just don't have that touch to feel the click and then let go.

 

Most cars have their nuts torqued about triple what it should be. If a women cannot remove the wheel with the little wheel spanner provided with the car, blame your friendly tyre centre.

 

When I was at university the engineering faculty used to publish a wonderfully salacious magazine. Like all good tabloids it had a page 3 babe, commonly known as the torque wench. I hope the tradition was preserved.

 

 

 

 

 

 

Johan Bornman2008-06-26 09:45:48

[Dirtbreath]

 

 

Most cars have their nuts torqued about triple what it should be. If a women cannot remove the wheel with the little wheel spanner provided with the car, blame your friendly tyre centre.

 

 

 

You let women change a wheel?! Shame on you!

[Johan Bornman]

I can supply a product that is manufactured by a comp that also produces for Teng Tools. It really looks identical to the Teng product
5Nm - 20Nm
Have been using one for years and is totally up to the job
I've got 10 in stock
Price R 450.00

This is a good price for a good product guys. Most of you will have a bunch of 1/4 inch bits and sockets already.