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tightening crank arm

Old 09-08-05, 02:03 PM
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gonesh9
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tightening crank arm

After a mountain bike ride the other day I noticed the crank arms are a little loose, there's some back-and-forth play... I've got Shimano XT mountain cranks. Could I just tighten it with an allen wrench, or could there be something else wrong?

Sorry if it's a dumb question... I've learned how to deal with a lot of issues on the bike, just haven't ever delt much with the cranks or BB.
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Old 09-08-05, 02:16 PM
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Well, you can certainly retighten them,but if the interface is hosed they will come loose again. Sure it's not a loose BB?
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Old 09-08-05, 09:45 PM
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Originally Posted by sydney
if the interface is hosed ...
Interface ? hosed ? Those two words don't even exist in the vocabulary of bicyle mechanics. what are you babbling about master muppet ?
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Old 09-08-05, 10:55 PM
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Must be something in the air.. mine did this too. About 25 miles into a 45 mile ride. I heard the distinctive "tinking" sound. I had about 250 miles or so on the crank/BB. I retightened the bolt and all seems well now.
D
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Old 09-09-05, 09:39 AM
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yeah, so figure out if it's the bottom bracket or the crank arms

i recently had a crank arm that kept slipping (loosening even after tightened) which means theres actually a problem with the crank arm

but figure out if its yer BB or crank arm. either can be tightened back down and hopefully that'll correct it. if it doesnt then you got a bigger problem with on eof them.
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