torque wrench

abcdggs

is a torque wrench really necessary to build a bike?

if so what kind of values would i want on one i get??

AstraMonti

abcdggs wrote: »

is a torque wrench really necessary to build a bike?

if so what kind of values would i want on one i get??

If you were building a carbon bike i 'd say is essential. You don't want to overtight it!

abcdggs

thanks, what kind of values do i want like 5-25 nm or 21-105nm?

Lumen

In my non-expert experience, there are two levels of torque you want to apply: 4-5 Nm, and "lots".

Something like this is quite appealing.

I have a BBB torque wrench (from CSS), it does the job. In a recent review I read the Park one (with the traditional bar thing hanging off it) was considered good VFM.

edit: there's a table of torque values for different parts at the back of the Park book, but it's by no means comprehensive. I can check ranges when I get home if you like.

Chips Lovell

Depends on what are tightening.

DirkVoodoo

5-25 Nm would cover most of the major parts on the bike.

Yes they are pretty important, the right torque is vital and since the ranges are so small (between 12-15Nm for shimano cranks) it is nearly impossible to gauge accurately by hand and can result in expensive repair bills if you get it wrong.

abcdggs

that would be great, thanks
i've just started buying things to build up my bike and i would hate to damage it

DirkVoodoo

This is pretty essential reading so:

Park Tools recommended torque sheet

Also check out the manufacturer's websites for specific torque ranges if they aren't listed there. Write them down so you always have them at hand.

Lumen

DirkVoodoo wrote: »

Park Tools recommended torque sheet

This?

Bicycle Specific Torque Values

Stupid non-S.I. units.

DirkVoodoo

Ah balls, my link he no work!

Yes, I'm guessing that's right Lumen, I just formatted my laptop so I have no pdf viewer installed.

kona

45nM is the max and thats a crank bolt, and cheap torque wrench will do it.
I got a lidl one for e25 the goes to 105nM

abcdggs

thanks all, looks like i'll have to buy one. more money this cycling lark is taking on me.:mad:i really hope this bike turns out well