roadiewill
New Member
- Location
- Wiltshire
How do you measure torque when tightening the seat post clamp? My tarmac has a carbon seatpost that Im concerned about over tightening.
thanks
thanks
Measuring Torque
- Thread starter roadiewill
- Start date
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Smokin Joe
Squire
- Location
- Bare headed cyclist, Smoker
Invest in a torque wrench for about £40. Or get your LBS to torque it up to the correct setting and then slacked off half a turn with an allen key and re-tighten to get the feel for the amount of pressure you need.
HLaB
Marie Attoinette Fan
My Bianchi has a clever but simple gauge built into the seat clamp but i've never seen it elsewhere 
. I've never really bothered with the Sirrus I just do what feels right, one of these days though I'll invest in a Torque wrench too.
. I've never really bothered with the Sirrus I just do what feels right, one of these days though I'll invest in a Torque wrench too.
E
Euan Uzami
Guest
DaveP
Well-Known Member
- Location
- Romney Marsh; Kent
roadiewill said:
Roadie,
Any decent torque wrench will have the settings already etched into the body somewhere making it a bit of a doddle in setting to the correct value.
Good luck...
I was using the BBB Torque wrench for putting on my wife’s new Tektro CR 720 brakes last week. A nice piece of kit.Euan Uzami said:
If you have one of these wrenches, make an arm from a length of metal strip and a hex head bolt. ( make sure the bolt is dead tight ).
A 1m length with a 1 kg weight hanging on it will be 9.8 Nm.
If you drill holes in the arm at appropriate distances, you can plot a 'calibration curve' for the wrench.
Do this every six months and you will be ISO 9000 approved.
Or NOT, but it satisfies your mind.
A 1m length with a 1 kg weight hanging on it will be 9.8 Nm.
If you drill holes in the arm at appropriate distances, you can plot a 'calibration curve' for the wrench.
Do this every six months and you will be ISO 9000 approved.
Or NOT, but it satisfies your mind.
E
Euan Uzami
Guest
yep, nice int it. i especially like the little button that releases the heads.john59 said:
Mr Pig
New Member
- Location
- North Lanarkshire
Word of warning. Most car torque wrenches don't go down low enough to cover most of the fittings on a bike. Just in case you thought a car one would do the job, it won't.
E
Euan Uzami
Guest
...but needed for some torques. e.g. crank bolts 35Nm.
fossyant
Ride It Like You Stole It!
- Location
- South Manchester
Big wrench...ooh...it's a plastic bike......not then....
Get a good quality torque wrench, and some carbon assembly paste....
I have yet to experience plastic parts......hmmmm !!!!
Get a good quality torque wrench, and some carbon assembly paste....
I have yet to experience plastic parts......hmmmm !!!!
youngoldbloke
The older I get, the faster I used to be ...
Recently, after considerable searching/research, I finally bought two torque wrenches from PVR Direct, both Sealey, and both with calibration certificates. A STW1012, 2-24 Nm, and an AK623, 27.1 -108.5 Nm. Also Sealey S0533 Hex Bit & Holder set, and a couple of adaptors/sockets. All for about £60. I am no expert but I think they are pretty good - as I said I did a lot of research, and was looking for certificated kit - and they were discounted by more than 50% when I bought them. Best prices around at the time. Also relatively difficult to find 'light' torque wrenches anyway. The S0533 Hex bit and holder set is really worth having.
first posted on http://www.cyclechat.co.uk/forums/showthread.php?p=486405#post486405
first posted on http://www.cyclechat.co.uk/forums/showthread.php?p=486405#post486405
Steve Austin
The Marmalade Kid
- Location
- Mlehworld
Torque wrenches are a perfectly good way of spending money on something for your toolbox that you don't need.
All bolts need tightening till they are tight. I don't need a £60 spanner to tell me that
All bolts need tightening till they are tight. I don't need a £60 spanner to tell me that
Mr Pig
New Member
- Location
- North Lanarkshire
Steve Austin said:
Sorry, but that's nonsense. Unless you familiar with using tools and the torque they exert there is no way you'll get the torque right. 'Tight' is a relative term and means different things to different people. And it does matter.
In my experience, most people vastly over-estimate the amount of force fasteners need. They round off Allan bolts and keys like nobody's business then blame the tools! Not just on bikes but on everything. They assume tighter is better and do not understand the amount of leverage the tool gives you.
And conversely there are some things that need to be done up far tighter than you might expect, even on a bike. Like you, I've got a far better chance than most of getting the torque in the ballpark using my own judgement, but if anything, my experience has taught me to use a torque tool if one is available. I would say it was a must for anyone less technically proficient.
Steve Austin
The Marmalade Kid
- Location
- Mlehworld
So, in order to do any work on a bike then we all need to buy torque wrenches Mr Pig.?
Think about that for a minute, and i think you'll agree its a daft statement.
Bikes are very simple machines that need a modicum of common sense and mechanical ability. I can't think of one component that 'needs' a torque wrench in order to be done up correctly.
Its something recommended by the manufacturers to squeeze out of liability, and defects. Thats the nonsense in this discussion.
Think about that for a minute, and i think you'll agree its a daft statement.
Bikes are very simple machines that need a modicum of common sense and mechanical ability. I can't think of one component that 'needs' a torque wrench in order to be done up correctly.
Its something recommended by the manufacturers to squeeze out of liability, and defects. Thats the nonsense in this discussion.
