left threaded torque wrench,

Wilby_89
Wilby_89 Posts: 96
edited July 2016 in Road general
I need to get a left threaded torque wrench for my vectors 2s.
when tightning them by feel I seem to get the results of -0.21 where as I should be aiming for a 0.
Garmin recommends using a torque wrench to get this result.
Was wondering if anyone knows a specific wrench that will achieve this for a resonable price
everytime I look on amazon they state reversible but the torque doesnt work both ways which i need any recommendations please.

Comments

  • BrandonA
    BrandonA Posts: 553
    The Park Tool wrench will do it
  • Wilby_89
    Wilby_89 Posts: 96
    Yeah I thinks that's my only option along with the crow foot adapter.
    Didn't think I would have to spend another £100 after spending so much on the vectors.
    Oh well I guess if I want accurate readings it has to be done.
  • sungod
    sungod Posts: 17,379
    when using a crow foot adaptor, when you want the torque wrench to operate in the other direction you simply move it to the other side of the adaptor
    my bike - faster than god's and twice as shiny
  • Wilby_89
    Wilby_89 Posts: 96
    Cool thanks,
    Do you mean as opposed to change the switch direction on the torque wrench?
  • veronese68
    veronese68 Posts: 27,826
    Surely using a crows foot on a torque wrench will throw the readings out rendering it inaccurate.
    Kinesis Pro6
    Marin Nail Trail
    Cotic Solaris
  • slowbike
    slowbike Posts: 8,498
    Veronese68 wrote:
    Surely using a crows foot on a torque wrench will throw the readings out rendering it inaccurate.
    Why? - Garmin use one...

    https://www.youtube.com/watch?v=9pvMqxQwpz4

    they also say that you don't need to use a torque wrench - just err on the side of over tighten ...
  • g00se
    g00se Posts: 2,221
    What torque do you need to achieve?

    I've got one of these and it's bi-directional:

    http://www.chainreactioncycles.com/x-to ... lsrc=aw.ds
  • sungod
    sungod Posts: 17,379
    Wilby_89 wrote:
    Cool thanks,
    Do you mean as opposed to change the switch direction on the torque wrench?

    yes, you leave the lever in the direction where the wrench acts as a torque wrench

    simply choose which side of the adaptor you need to connect through to give you overall rotation in the correct direction
    my bike - faster than god's and twice as shiny
  • Barbarossa
    Barbarossa Posts: 248
    Generally, torque wrenches with reversible ratchets still only measure torque clockwise. Those of you who don't believe me, torque up a bolt, reduce the torque setting and reverse it and see if it clicks before the bolt loosens.

    For left-hand measurement, you need one with a push through drive peg like this one.

    When you use a crows foot, the torque wrench should be at 90 degrees to the crows foot to give the same torque as indicated.
  • veronese68
    veronese68 Posts: 27,826
    Slowbike wrote:
    Veronese68 wrote:
    Surely using a crows foot on a torque wrench will throw the readings out rendering it inaccurate.
    Why? - Garmin use one...

    https://www.youtube.com/watch?v=9pvMqxQwpz4

    they also say that you don't need to use a torque wrench - just err on the side of over tighten ...
    Why? Physics. You are adding a lever onto the end of it so the amount of force required changes. Although making a longer lever will make it under read so you would be over tightening.
    Kinesis Pro6
    Marin Nail Trail
    Cotic Solaris
  • slowbike
    slowbike Posts: 8,498
    Veronese68 wrote:
    Slowbike wrote:
    Veronese68 wrote:
    Surely using a crows foot on a torque wrench will throw the readings out rendering it inaccurate.
    Why? - Garmin use one...

    https://www.youtube.com/watch?v=9pvMqxQwpz4

    they also say that you don't need to use a torque wrench - just err on the side of over tighten ...
    Why? Physics. You are adding a lever onto the end of it so the amount of force required changes. Although making a longer lever will make it under read so you would be over tightening.

    Good point - just as well Garmin say to err on the side of over tightening then ;)
  • veronese68
    veronese68 Posts: 27,826
    Slowbike wrote:
    Good point - just as well Garmin say to err on the side of over tightening then ;)
    I wonder if they knew they were that or it's just a happy coincidence.
    Kinesis Pro6
    Marin Nail Trail
    Cotic Solaris
  • Wilby_89
    Wilby_89 Posts: 96
    Just tightened the pedals to the correct torque did the calibration test and getting the same results -0.34 as before when I just did it with the normal spanner?
    Therefore I thought id add a bit more nm not too much and getting the same result -0.34 what's up with that are my vector 2s faulty.
    Just wasted a £100 on a torque wrench just to get the same result can anyone help please.
  • slowbike
    slowbike Posts: 8,498
    Sorry - one of the reasons I went to Stages was because it was a simple, no calibration jobby ... and it was cheaper ...
    I have 2 torque wrenches - a long handled one for the car - I use this on the cassette lockring - and a fixed 5Nm key one - anything else just gets the hand tighten ... fortuantely none affect any readings on the computer... :)
  • Wilby_89
    Wilby_89 Posts: 96
    sorted it just added a washer and torqued to the correct amount and now getting 0 to -0.03 that's more like it few was worried there sorry to waste your time.
  • slowbike
    slowbike Posts: 8,498
    you're not wasting anyone's time ... everyone on here wastes their own time! ;)

    was the washer included in the pedal set? Did you just miss it out due to not reading the instructions?

    (Oh and btw - it's phew ... few is not so many - unless you're referring to the washers? ;) )
  • Wilby_89
    Wilby_89 Posts: 96
    Yeah it was included with the vectors 2s.
    did some searching on the internet and they recommend to add the washer.
    if I'm still not getting a perfect 0 but instead 0.03 to 0.09 this wont affect the accuracy to much will it?
    tried nearly every measurement between the recommended 34-40nm and can never find that sweet 0.
  • slowbike
    slowbike Posts: 8,498
    No idea! I assume you're talking about the calibration settings?
  • Wilby_89
    Wilby_89 Posts: 96
    yeah in the Garmin installation video the guy does the calibration test and gets a perfect 0 where as when I do it to the recommended torque I get between 0.03 to 0.06 but was wondering is this something to be worried about or is it such a small increment that it wouldn't matter.

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