Questions tagged [torque-wrench]
The torque-wrench tag has no usage guidance.
25
questions
5
votes
3answers
2k views
What's so special about bike-specific torque wrenches?
Prelude
I had figured that since I'm riding an alloy bike with a carbon fork, I will only need a torque wrench if/when I will want to change the stem—and even then, that's assuming the steerer is of ...
0
votes
1answer
105 views
Tightening torque for a Surly bike
I just bought a Surly steamroller frame and I am about to mount my bike.
I would like to know the tightening torque related to my frame or other components of my bike that is recommended by Surly.
But ...
2
votes
2answers
2k views
What should the torque of an expander plug in a carbon fork be?
What torque should be used for the expander plug in a carbon fork?
This one shows 8NM, which seems high
Manufacturers rarely seem to supply this information, yet tightening too much could damage the ...
11
votes
1answer
711 views
Consequences of under-tight cassette ring?
I have a torque wrench that goes up to 24 N⋅m but as far as I understand a cassette ring should be tightened to about 40 N⋅m. What is the consequence of tightening the cassette ring to 24 N⋅m instead ...
6
votes
2answers
605 views
How do I properly torque a track cog lockring?
I see a torque rating is stamped onto a lot of track cog lock rings:
However, I cannot find a way to use a torque wrench when tightening the lock ring. All the tools I've found, like Park Tool's HCW-...
1
vote
1answer
1k views
Replacing cranks on SRAM Force AXS
I've purchased some shorter cranks for my SRAM Force AXS eTap bike, and I'm trying to decide between learning and swapping them myself vs. bringing it into a LBS.
Pros of doing it myself:
learn for ...
1
vote
1answer
253 views
Bottom bracket servicing
My crankset is driving me nuts, because of creaking noises when pedaling.
I have fixed the issue twice already, by removing the bottom bracket (FWIW, it's a 68x115mm square, pictured below, and my ...
4
votes
1answer
2k views
Clarification on the steerer tube torque of the stem bolts
On my stem a label says "All max. 8 Nm" next to the handlebar clamp bolts.
This is the only labeling:
On the internet I found other values ranging from 20 - 30 or even 10 - 30.
Refer to:
This ...
1
vote
1answer
3k views
Torque wrench doesn't click
I have a new and calibrated torque wrench that is for 2-15NM. When I'm tightening a bolt it doesn't seem to click even at 2NM no matter how hard I turn.
I tried using it against a same size hex key ...
1
vote
0answers
208 views
Click/snap sound while fastening brake lever onto carbon bar
I was fastening Shimano STI levers onto Bontrager carbon drop handlebars yesterday, with my torque wrench set at ~2nm, and heard a short rather loud click/snap sound shortly after starting to tighten, ...
10
votes
4answers
3k views
Are rotor bolts designed to shear?
I was toying about with a disk brake for the first time and managed to shear two bolts clean off while reassembling.
Curiously, both tore the head off, leaving the threadded shaft in the tapped hole ...
5
votes
2answers
1k views
torque wrench warm up procedure?
Does anybody have a suggested "warm up" procedure for a small 1/4" drive torque wrench? I've searched the internet and found surprisingly little on this topic.
Here is how I've been doing it so far:
...
4
votes
4answers
436 views
Torque wrenches
How do I determine the torque required for different bolts, etc.? I am new to the world of torque wrenches and have not purchased one yet. I am suffering from chronic loosening of the left side crank ...
5
votes
2answers
301 views
How can I assess my torque wrench?
I have owned a dynamometric wrench for two years now, and I got it second-hand in the first place. I fear that relying on its indication could be even less accurate than tightening by intuition. For ...
0
votes
1answer
629 views
Shimano FC-M521 middle chainring replacement
What exact torque should be applied to secure the double gear fixing bolt (Y-1FM98020) ?
And what tool is usually used to fix the nut without damaging it while tightening the bolt?
1
vote
1answer
2k views
Over-tightening a BB
I just installed an external bottom bracket (Hollowtech II type) on my steel bike. The manufacturer (Sugino) prescribes a 40-50Nm torque. I own no torque wrench, so I just wrenched it on pretty tight. ...
1
vote
2answers
12k views
Need to know the wrench size for 10.9 screw
My pedal just unscrew. It has a hexagon-headed screw with '10.9' screw label. Anybody knows what size of wrench I need for this screw?
17
votes
3answers
82k views
Tightening torque: 5Nm, 40Nm... how do I tell?
I have wonderful new manuals everywhere, of brakes, wheels...
In these manuals I see "tighten up to 5Nm", "tighten up to 40Nm".
There must probably be tools with such measurements on them, but I don'...
2
votes
1answer
961 views
Italian bottom bracket Shimano BB-6400 fixed cup tightening - what tool?
All,
I have a Shimano 600 Italian-threaded bottom bracket (BB-6400) and after riding with it for a few weeks, the fixed cup is loosening. I've since read up about Italian BBs and learned that the ...
5
votes
4answers
10k views
My crank fell off, how do I re-attach it?
I was out riding on my mountain bike when my crank unexpectedly fell off (video).
How do I reattach the crank? There's a torque range specified (25-30 Ft-Lbs):
how critical is this? I don't own a ...
5
votes
2answers
6k views
Is torque relevant for steel/aluminium? Where do I find torque specs?
When you are not dealing with carbon, is torque relevant?
I've never seen it mentioned on the hundreds of answers here, or the hundreds of how-tos I've read elsewhere.
Should I just tighten ...
16
votes
7answers
12k views
Why would I need a torque wrench for a bicycle?
I was rather surprised to find a question about choosing a torque wrench on this site. I haven't cycled for years, but many years ago when I actually cycled I would do with a set of ordinary wrenches ...
4
votes
2answers
744 views
What should I look for in a torque wrench?
It has come to the point where I need a torque wrench for installing things on my bicycle. What should I look for when purchasing one?
9
votes
4answers
5k views
How to objectively evaluate torque wrenches?
My local bicycle group bought very nice but very expensive torque wrenches (if I can remember right they cost about €300–500). My local discount store markets them for about €50. My local auction site ...
8
votes
2answers
2k views
Tightening a nut too much
Often guidance will be given to tighten a nut to "20 ft. lbs. (27 Nm)" or something along those lines.
What's the best way to ensure you tighten things up, but don't over-tighten?
Is there any way ...
