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Old 05-16-14, 12:30 AM   #1
Little5er
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Interchangeable Cassettes

So I will be riding in my first crit next weekend and I have a question regarding wheels for the wheel pit. I'm currently riding on 10 speed SRAM and I have an older 7 speed shimano wheel set from my old bike. Would there be any chance that the 7 speed cassette will work with the 10 speed derailleur?

I'm guessing the answer I will get is no, so if that is the case does anyone know the best place to find a cheap used cassette that I can put on my spare wheel set?

Thanks
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Old 05-16-14, 03:52 AM   #2
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Doesn't sound possible, but if it were at minimum you'd need a longer free body and a longer axel.

BikeRadar.com ? View topic - Cassette compatibility
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Old 05-16-14, 07:21 AM   #3
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No. Your shifters are also part of the problem. Changing them on a free-lap would be... time-consuming.

To find cheapest cassettes, I use Google Shopping. You could also try CraigsList for your area. The cheapest cassettes I can usually find are in the $50-60 range. Cheapest SRAM cassette I found (I prefer SRAM cassette's with my Ultegra setup) was one I found at Performance Bikes. It was on a sale. I haven't found it again.

Best solution, though: check at your LBS. Racers should support LBS's so when you need something last-second, they will be more inclined to help you.
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Old 05-16-14, 07:38 AM   #4
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It's not just a matter of buying a new cassette, like gsteinb said, you won't be able to put a 10-speed cassette on the 7-speed wheel.

In other words, you can't use the rear wheel as a pit wheel.

Last edited by globecanvas; 05-16-14 at 10:10 AM.
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Old 05-16-14, 07:40 AM   #5
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I got an ultegra 10 speed from ebay for like $55. I bet you can get tiagra or 105 for around $30.
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Old 05-16-14, 08:26 AM   #6
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Originally Posted by Little5er View Post
So I will be riding in my first crit next weekend and I have a question regarding wheels for the wheel pit. I'm currently riding on 10 speed SRAM and I have an older 7 speed shimano wheel set from my old bike. Would there be any chance that the 7 speed cassette will work with the 10 speed derailleur?

I'm guessing the answer I will get is no, so if that is the case does anyone know the best place to find a cheap used cassette that I can put on my spare wheel set?

Thanks
front wheel should work, you can just buy a spare rear wheel with a cheapo cassette to use as a backup. aside from just pit wheels, it's good to have a backup to use when needed.
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Old 05-16-14, 10:09 AM   #7
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Gsteinb giving mechanical advice is hilarious. I'm surprised he even knows what a cassette is. He is right about this one, though. Even a blind squirrel gets a nut every once in a while.

Put the front in the pits and pray. Get a spare like MDcatV says. I bought my trainer wheel brand new on Amazon for $75 shipped.
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Old 05-16-14, 10:46 AM   #8
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7-speed wheel won't fit on your 10-speed bike without lots of work. The spacing between the dropouts for 7-speed is less than 10-speed. If I were in your position, I would either borrow a rear from someone for my spare or go without.
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Old 05-16-14, 11:18 AM   #9
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Another option is to replace the hub, nipples, spokes, cassette, and the rim. You should be fine with the same rim tape though.
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Old 05-16-14, 12:26 PM   #10
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Thanks for all of the tips everyone! Looks like for now I'm going to go with the front wheel and pray...
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Old 05-16-14, 07:47 PM   #11
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Quote:
Originally Posted by MDcatV View Post
front wheel should work, you can just buy a spare rear wheel with a cheapo cassette to use as a backup. aside from just pit wheels, it's good to have a backup to use when needed.
will work.

Quote:
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Gsteinb giving mechanical advice is hilarious. I'm surprised he even knows what a cassette is. He is right about this one, though. Even a blind squirrel gets a nut every once in a while.

Put the front in the pits and pray. Get a spare like MDcatV says. I bought my trainer wheel brand new on Amazon for $75 shipped.
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Old 05-17-14, 06:35 AM   #12
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You can use the 7 speed wheel. After you install it, shift around until you find the least noisy, least skipping gear. Then leave it in that gear.
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