Do you tighten your water bottle bolts to a specific torque?
I tighten just about every other bolt with a torque wrench to a specific torque but do the water bottle bolts by feel - ie, does the cage wiggle.
So just curious, does anyone tighten to a certain spec? 5Nm is common in other spots but sounds kind of high for that spot. A quick search brings up 2 and 3 Nm which seems to be similar to what I've done by hand. |
Quick answer - no, never thought about it before.
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Nope, just snug and tug. If your concerned about over tightening use a nylon bolt. The bolt will strip before the boss.
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2Nm sounds like about finger tight. I've aimed for finger tight in the past. Also, for the record, Speedplay cleats say 2.5 Nm if using a torque wrench, or until the screws feel notchy if no torque wrench. They specially designed the screws so that you get a notchy feeling at their desired torque. Anyway, that's pretty little torque, and I think my water bottles are about that tight.
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I don't use a torque wrench on any M5 or M6 bolt on my bikes.
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Trek's specs for M5 waterbottle bolt- 2Nm, 3Nm max.
Typical spec for M5 waterbottle bolt- 3Nm, 4Nm max. Both are from Lennard Zinn's, Zinn and the Art of Road Bike Maintenance. |
No, the only places I use a torque wrench are
- stem bolts (both steerer and bar locations) - seatpost collar (force of habit learned from carbon frames, so I do it on my steel frames also) - headset preload - front derailleur clamp edit: Oops, forgot one: - cleats |
Snug. I have metal and plastic cages; I use an allen wrench lengthwise and make it hand tight.
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One thing I'll say is do not under any circumstance tighten an empty waterbottle cage bolt against a simple riv-nut mount on an alloy, carbon, or titanium frame - it's just asking to have the spinning nut of death rise from the grave and haunt you. And yet people do it. Constantly.
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Anyone use LocTite on water bottle cage bolts? I guess I've had them come loose on me on a rare occasion.
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Now I have to go find a scrap frame and see what torque value will cause the rivnut to spin out.
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