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 Post subject: torque wrench?
PostPosted: Wed Mar 12, 2014 12:36 am 
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Joined: Wed Sep 26, 2007 1:57 pm
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Location: San Francisco, CA
Is it time to join the torque wrench generation? Or are torque wrenches for wimps?

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 Post subject: torque wrench?
Posted: Wed Mar 12, 2014 12:36 am 


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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 12:43 am 
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Joined: Tue Feb 05, 2013 11:53 pm
Posts: 110
Vectors?


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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 12:51 am 
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AndreLM wrote:
Vectors?

Yes. To install them I used a 25 lb box of kitty litter mounted on an 11 inch pedal wrench. That should have worked. But power data are clearly low:

Single point from Vector is on heavy randonneuring bike, most others are on Ritchey Breakaway road bike. Strava data are low because weight doesn't include equipment (clothes, helmet, shoes, backpack).

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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 12:56 am 
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Joined: Tue Feb 05, 2013 11:53 pm
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Cool. Would love to see your conclusions (even if I do not plan to use them...)


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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 1:08 am 
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I need to put them up against Powertap on the same bike (requires pairing each with a separate head unit). But it may be a washer issue, not a torque issue. I didn't use any washers because on my crank, which is relatively flat, it didn't look like any would be needed.

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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 1:26 am 
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You need to add about 2.5 lb. to your 25 lb. bag of cat litter to get the desired 25 ft lb. of torque with an 11 inch lever no?


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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 2:41 am 
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Joined: Fri Oct 28, 2011 3:25 am
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Location: United Kingdom of Great Britain and Northern Ireland
What you going to do with that 15mm crowfoot?


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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 3:29 am 
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Apply proper torque the Vector onto the crank.


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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 4:07 am 
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I pushed slightly to account for the difference....
But it seems a torque wrench might be a good idea in general for bolt-tightening. Or is that over-stated?

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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 8:24 am 
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Joined: Tue Apr 12, 2011 8:08 am
Posts: 2012
Location: Pedal Square
Got one (BBB) some time ago and found out that 5Nm is really not all that much. Didn't have any problems in the years without it, though.

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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 12:13 pm 
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Can't hurt to know how tight you've gone, at least if you decide to go more or less your decision is a bit more informed.


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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 1:07 pm 
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Joined: Sat Feb 23, 2008 6:33 pm
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smart move DJ. your measuring your training precisely, might as well properly measure your bolt torquing. just think of all the other bolts you can now torque properly with peace of mind. DC Rainmaker has info on the proper torque values for the Vector.


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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 1:51 pm 
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Joined: Sun Jan 03, 2010 4:58 am
Posts: 515
For a person who torques bolts everyday, it might be a waste of time. For an item like Vector, it appears to be a must have [experience or not].

For a person who will spend $1700 for a set of pedals and buy a $50 torque wrench.........well that's just ludicrous. If I did not want to buy a good torque wrench, I would pay someone who would torque it down properly for me.

BTW, using a beam type torque wrench is only accurate if you are looking at the indicator straight on. Attempting to torque a fastener, hold the items, and looking straight on the wrench to get a correct reading, is like watching monkeys with footballs.


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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 4:56 pm 
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Location: San Francisco, CA
Well, to be honest I didn't buy the Vector. But the beam wrenches were specifically recommended to me as generally more useful than the click-type wrenches as long as you have line-of-sight. The click-type are better for working under cars, and I don't have a car.

It seems like the torque wrench is a good idea for someone not turning bolts on a daily basis. Even if it prevents one mistake it's worth the money.

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 Post subject: Re: torque wrench?
Posted: Wed Mar 12, 2014 4:56 pm 


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 Post subject: Re: torque wrench?
PostPosted: Wed Mar 12, 2014 5:15 pm 
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Joined: Tue Jan 28, 2014 7:54 am
Posts: 25
I have the Vectors and use the Beam torque wrench and crowfoot method. Having moved and installed my Vectors numerous times between my trainer bike and road carbon, I can say that the Beam+crowfoot method is workable, but probably not ideal or incredibly precise. I've had issues in terms of getting lower readings on one bike vs the other.

The challenge in getting a correct reading is being able to look straight on the gauge while tightening given the rotation of the crank set while trying to tighten. Subsequently, I've purchased a TEKTON click-type torque wrench from Amazon to use with the crowfoot. This combination does not work well given the overlap on the female end of the crowfoot due to the increased head size of the click-type torque wrench. I'd like to use this but I think another crowfoot type option would be required (anyone have any thoughts on this?)


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