Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.takiguy
11-17-07, 09:34 AM
Hello,
I just bought a used Trek Mountain Track 800 for $120. I didn't get a good chance to test it beforehand, and I have very little experience doing anything with bikes other than replacing a punctured tire.
The problem is: whenever I am putting a lot of pressure on the pedals and pedaling hard -- ie on hard uphill climbs -- the pedals will 'jump.' It happens a lot when rear gears are in the 4 highest (4,5,6,7), and front is in the highest (3).
I looked at the chainring, and the teeth are a little bent. The "cogs" on the rear cassette look ok. I don't know very much about the chain itself other than it doesn't look bent :\.
Is it jumping because the teeth are bent on the chainring? Should I get a wrench/vice and try to straighten the teeth? Is there something wrong with the chain? Derailleur? I'm not sure how to fix much of anything, and I am just now learning all the parts of the bicycle, but I bought this bike partially for riding and partially to learn how to fix things (which I am not very good at). What can I do? Thanks.
I just bought a used Trek Mountain Track 800 for $120. I didn't get a good chance to test it beforehand, and I have very little experience doing anything with bikes other than replacing a punctured tire.
The problem is: whenever I am putting a lot of pressure on the pedals and pedaling hard -- ie on hard uphill climbs -- the pedals will 'jump.' It happens a lot when rear gears are in the 4 highest (4,5,6,7), and front is in the highest (3).
I looked at the chainring, and the teeth are a little bent. The "cogs" on the rear cassette look ok. I don't know very much about the chain itself other than it doesn't look bent :\.
Is it jumping because the teeth are bent on the chainring? Should I get a wrench/vice and try to straighten the teeth? Is there something wrong with the chain? Derailleur? I'm not sure how to fix much of anything, and I am just now learning all the parts of the bicycle, but I bought this bike partially for riding and partially to learn how to fix things (which I am not very good at). What can I do? Thanks.