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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 06-18-08, 05:45 PM   #1
Joseph G
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Used Trek 700 Multi-Track

I am not new to biking, but I am new to advanced bicycle mechanics. I have done minor repairs. I have a very well used 1992 Trek 700 hybrid. Besides repacing the tires, seat, and cables, that I can do: on this bike I will need to replace the bottom bracket(don't even know what bottom bracket to order), sounds like a pepper mill grinding. Moreover, I think that have to replace the the rear hub and some broken spokes. Besides the minor repairs, the major repairs at a bike shop would cost more than the bike is worth. Would appreciate any suggestions.
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Old 06-18-08, 05:58 PM   #2
DieselDan
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Make sure the seatpost isn't siezed. If so, then forget it, the cost of removal isn't worth it. Better to replace the entire rear wheel then get a new rim laced to the hub. Of several spokes are broken, and the bearings need replacing, just get a new wheel. The bottom bracket can have the bearings replaced for a reasonable price.

The question isn't are the repairs more then bike, but is the repair cost more then a new bike.
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Old 06-19-08, 12:13 AM   #3
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Thanks for the reply. How do you know if the seat post has seized? Also, I know getting the bike repaired would cost more than the bike is worth. Moreover, doing it myself may end up costing me more than buying a similiar used hybrid. However, I would like to learn how to do these more advanced repairs.
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Old 06-19-08, 02:54 AM   #4
Bill Kapaun
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Your major dilemma is tool cost, unless you can borrow bike specific tools.
I've replaced a BB myself without the correct BB specific tools, but I had a good assortment of other tools to choose from. One was a large curved jaw vise grip pliers!. You still need a crank puller though.
That's probably a cup type BB? IF just the Ball Bearings were pad, it would be cheap to fix, parts wise. Chances are though, that one or more cups and/or the spindle is bad. Those parts are getting difficult to find and could EASILY cost more than a low end cartridge stle BB. Those require a special tool to install.
Crank puller- probably $15? (I paid $18 at the lbs)
BB tool- probably another $15? (lbs wanted $22?)

Then you have the rear wheel. Doesn't your bike have a 6 speed Free Wheel?
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Old 06-19-08, 10:39 PM   #5
Joseph G
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Thanks for the reply. The bike has a seven speed free wheel with a Shimano Altus derailler. I want to purchase a basic bike specific tool kit: e.g. Nashbar, Pricepoint, or Performance Bike tool kit.
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