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  1. #1
    Junior Member
    Join Date
    Jun 2007
    Location
    Tampa Bay
    My Bikes
    Orbea Onix
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    How to check how much force is being applied?

    I noticed that a lot of parts and components have instructions limiting the force to be applied. Is there a meter that one can use? How do you make sure you are not exceeding the limits?

  2. #2
    Senior Member Retro Grouch's Avatar
    Join Date
    Feb 2004
    Location
    St Peters, Missouri
    My Bikes
    Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Hase Kettweisel Tandem (redundent recumbent), Merin Bear Valley (The gopher).
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    26,060
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    Torque wrench.

    I've got a couple of them: I use one with 3/8 drive for cranks and bottom brackets which I'd probably undertorque if left to my own judgement. I use one with 1/4 drive for high dollar stems and carbon fiber parts which I'd probably overtorque or not tighten evenly if left to my own devices.

    Other than that, I pretty much just guess: Little bolt - just snug it down. Big bolt - crank that puppy.

    If you don't have a torque wrench, here's a way to educate your guess that works on big bolts. The torque spec for crank bolts is usually around 30 lb/ft. Imagine a 30 pound weight hanging on the end of a foot long wrench handle. Tighten it that much.

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