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Can I use any old rear wheel on my Trek 4300?

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Can I use any old rear wheel on my Trek 4300?

Old 05-20-08, 10:32 PM
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Can I use any old rear wheel on my Trek 4300?

I bought a set of road tires for my Trek 4300... and put them on, and love them But I was thinkin... if I got say, just a 21 speed rear wheel from somewhere, would it work on my bike? I was thinkin, if I mount my oem tires on a spare set of rims, changing tires would be as easy as swapping wheels. I already have the front tire mounted and ready to go for a 'swap' just missing a rear wheel... So can I do this? Like say I got a hold of a quick release rear 21speed Chinamart wheel...

edit: my bike is a 24 speed... so would a 7 gear rear wheel work in place of my current oem 8 gear wheel?
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Old 05-20-08, 10:50 PM
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It can be done as 7-speed cog spacing is the same as 8-speed cog spacing, but it's best done by adjusting the limit screws on the rear derailleur to "dial-out" the eighth shifter click. If you're not familiar with derailleur tuning, you might consider just purchasing an 8-speed wheel and cassette. If you choose wisely, you can have a higher gearing range for road with the smooth tires and a wider range for MTB riding.
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