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Discussion Starter · #1 ·
ok, I'm new to these forums but i'm looking for a little assistance as far as my Bottom Bracket and Rear hub are concerned. I've got a 04 P2, comepletely stock, except for the back rim, which is now a sun mammoth. i used the same hubs and spokes, but the spokes are slightly too long according to the guys at the shop. I don't know if this could be causing what i've got going on or not. to start with whenever i climb a hill that requires me to push instead of spin the cranks, i get a loud metally popping sound when the left crank is at the 10 o'clock position. I don't know what it is. the bike still has that damn truvativ boxguide on it, and i don't know if thats causing the popping or if its the bottom bracket having loose bearings...or....? as far as the rear hub is concerned it seems like the bearings arent tight enough. so i took the rim off, and tightened the bearings, which were slightly loose, and replaced the rim. I tried to wiggle the rim side to side and it did wiggle, and made that loose bearing rattle, so i took the rim off and put it on about 4 times trying to get the bearings tight enough. I'd tighten the bearings and wouldn't be able to wiggle the axle at all, and the axle was difficult to spin, but when i put the rim back on the bike it sill had that damn wobble. i don't know if this is because this is a loose bearing hub to begin with or if the problem lies elsewhere. please reply, i know its a long post but im still sort of new to reparing my bike. Thanks

Ian
 

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ballbuster
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start with the bearings.

First off, check Sheldonbrown.com for instructions on how to adjust hub bearings. In a nutshell, tighten the cones until you have a tiny hair of slop in the axle. When you tighten the QR, that will take up that tiny bit of slop.

The popping has to come from somewhere in a bearing, most likely. Dont forget to check the pedal bearings. All the bearings should spin silky smooth. Sometimes pedals have bushings in place of ball bearings, which means they won't spin freely, but still should feel smooth.

Heck, if you bought the bike from a shop, they should hook you up with service. Check with them before you do too much on your own.
 

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Discussion Starter · #3 ·
pimpbot said:
First off, check Sheldonbrown.com for instructions on how to adjust hub bearings. In a nutshell, tighten the cones until you have a tiny hair of slop in the axle. When you tighten the QR, that will take up that tiny bit of slop.

The popping has to come from somewhere in a bearing, most likely. Dont forget to check the pedal bearings. All the bearings should spin silky smooth. Sometimes pedals have bushings in place of ball bearings, which means they won't spin freely, but still should feel smooth.

Heck, if you bought the bike from a shop, they should hook you up with service. Check with them before you do too much on your own.
Yeah i figuredout what the problem with the hub is. As it appears to me the guy that was assembling the wheel had his head up his ass and ordered the wrong length spokes for the left side. since the wheel sits to the left a little, i had to set it off center in the dropouts to get it centered between the rear triangle. that little bit of an angle was causing the rattle. so yeah thats going in. as far as the popping sound, its not from the pedals, more from the bottom bracket area as far as i can tell. is there any way to tighten the bearings in the bb w/o completely dissasembling it and pulling the cranks because i don't have the tools for that. im trying to avoid as much downtime as possible, cuz im going to school in like 10 days, and i wanted to ride a bit.

ian
 
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