Torque Specs and Service Manuals
09-08-21, 06:27 AM
#1
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Torque Specs and Service Manuals
In a nutshell, I'm new to working on bikes but have been doing it fairly often as I've been riding fairly often and I like to take care of my bikes. I have a Giant Contend and a Giant Revolt Advanced 3. I do not see any "service manuals" for these bikes online when I search. Is this a thing in the bike world? Mostly, I'm just looking for the torque specs for the various fasteners to prevent from over-tightening or under-tightening. Where can I find these? Do the bike manufacturers not provide them? On some bikes, I've seen "Nm" written on the frame/components itself, but mine do not have this.
Thanks.
Thanks.
09-08-21, 06:49 AM
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Here are some basic ones, bicycle repair books like Zinn's have them as well:https://www.parktool.com/blog/repair...s-and-concepts
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09-08-21, 07:55 AM
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If your bike has Shimano components, then you will find quite a bit of info for installing, adjusting and servicing them at their Tech Documentation site. https://si.shimano.com/
The DM's give you the most information. Older versions of their products won't have a DM, but you can glean a lot of info from the other documents they do have. There are also lineup and compatibility docs.
Of course they aren't written to be in depth discussions. They are brief but once you gain some understanding and have a few "ah-ha" moments, they will be valuable sources.
SRAM and others have the documentation too. But I find it much harder to find on their sites.
And Park Tool makes some pretty decent instructions and vids too.
As for tightening things. IMO, you just need to tighten them enough to not slip or move. You don't have to go to the specified torque. Generally I think of that as the max torque you should ever use on that part.
The DM's give you the most information. Older versions of their products won't have a DM, but you can glean a lot of info from the other documents they do have. There are also lineup and compatibility docs.
Of course they aren't written to be in depth discussions. They are brief but once you gain some understanding and have a few "ah-ha" moments, they will be valuable sources.
SRAM and others have the documentation too. But I find it much harder to find on their sites.
And Park Tool makes some pretty decent instructions and vids too.
As for tightening things. IMO, you just need to tighten them enough to not slip or move. You don't have to go to the specified torque. Generally I think of that as the max torque you should ever use on that part.
Last edited by Iride01; 09-08-21 at 08:00 AM.
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09-08-21, 12:55 PM
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Originally Posted by Iride01
...As for tightening things. IMO, you just need to tighten them enough to not slip or move. You don't have to go to the specified torque. Generally I think of that as the max torque you should ever use on that part.
09-08-21, 09:53 PM
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Originally Posted by easyupbug
Here are some basic ones, bicycle repair books like Zinn's have them as well:https://www.parktool.com/blog/repair...s-and-concepts
Also appreciate the other advice given here. Sounds like it's not quite as dire as automobiles, but still worth the effort.
