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Crank bolts loose? Huh?

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Crank bolts loose? Huh?

Old 07-30-12, 03:35 PM
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rousseau
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Crank bolts loose? Huh?

Did my weekly lube and maintenance today. While wiping the outer crank ring I noticed it felt a little loose, which isn't good, so I tightened the crank bolt where it was loose. Then I checked the other three outward-facing crank bolts to find that they were loose too! The one inward-facing bolt connecting to the crank arm wasn't loose.

Still, what the hey? I never thought I'd see the day that four crank bolts all got loose. I didn't feel anything unusual on my ride yesterday, but I'll have to compare how it feels with the group ride I'm going on right now.

Weird? Weird!


Edit: By the way, I'm pretty sure this means I ride my bike lots.
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Old 07-30-12, 03:49 PM
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Do you mean chainring bolts? I have found that they are often not tight enough on a new crank. Folks tighten them just against the friction on the nut, but you actually have to hold the nut to tighten them properly. Its why they make a tool for that slot.
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Old 07-30-12, 05:47 PM
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D'oh! Chain ring bolts, yes. Actually, a wide enough flat-head screwdriver would do the trick. I'll have to remember to use one of those next time.
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Old 07-30-12, 05:51 PM
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Big screw driver works, but is also good for accidental impalement. That is why I got the $6 tool. Well, in truth, my largest screwdriver wasn't big enough. I probably would have risked the stabbing.
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Old 07-30-12, 05:58 PM
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Right ^^^^ the specific chainring bolt tool is VERY useful! I highly suggest having one in your toolbox if you do your own maintenance...I've got a couple of Shimano brand one's, not sure who else makes them. I'm sure a quick call to your LBS and they could find you one if a jiff.
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Old 07-30-12, 06:04 PM
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Be very careful with aluminum bolts. They strip very easily. Use loc tite blue.
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