Te mortuo heres tibi sim?
Join Date: Aug 2004
Location: East coast
Bikes: hardtail, squishy, fixed roadie, fixed crosser
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yes. something could be broken in there. or it could be signs of something wearing out. based on the vague description, it would be pretty hard to diagnose what's going on...
o.k. real answer. do you have tools/knowledge to take the cranks/bb off and out? yes? do so, and see what's up. no? either get the tools and either look on the web or in a bike repair book for the knowledge, or take your bike to a shop.
is anything feeling loose, by hand or when pedaling? or just making noise? most likely either something is a) loose or b) broken/manked up bearings. if loose, a simple tightening may suffice, or the interface between the crank/spindle/bearings may be screwed. if bearings, you may either be able to replace the bearings, or may need a new bottom bracket. if something is messed up, replace with new.