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Old 01-21-07, 03:01 PM   #1
cam117
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Do I need a special hub for an 11-21 cassette?

I need to get a new cassette to go with a wheel that I'd like to dedicate for my trainer. I just ordered a SRAM 970 11-21 cassette from pricepoint but then saw this from Sheldon Brown:

"Cassettes that feature an 11 tooth sprocket are intended to fit "C" (Compact) hub bodies only. The spline grooves in the 11 do not run all the way through (it wouldn't be strong enough if they did.)"

The wheel that I want to use is a Bontrager Select that came on my Trek 1200 with a 12-25 cassette.

Will this cassette fit my hub without modifications? I don't want to have to mess with any customizations or having to adjust the derailleur when I swap wheels on the bike.

Thanks!
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Old 01-21-07, 03:34 PM   #2
Sheldon Brown
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Quote:
Originally Posted by cam117
I need to get a new cassette to go with a wheel that I'd like to dedicate for my trainer. I just ordered a SRAM 970 11-21 cassette from pricepoint but then saw this from Sheldon Brown:

"Cassettes that feature an 11 tooth sprocket are intended to fit "C" (Compact) hub bodies only. The spline grooves in the 11 do not run all the way through (it wouldn't be strong enough if they did.)"

The wheel that I want to use is a Bontrager Select that came on my Trek 1200 with a 12-25 cassette.

Will this cassette fit my hub without modifications? I don't want to have to mess with any customizations or having to adjust the derailleur when I swap wheels on the bike.
Just take a look at the Freehub body and compare it with the photos at:

http://sheldonbrown.com/k7

Most Freehubs made in this millennium will work with an 11.

Sheldon "Look And See" Brown
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Old 01-21-07, 09:05 PM   #3
moxfyre
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Quote:
Originally Posted by cam117
Will this cassette fit my hub without modifications? I don't want to have to mess with any customizations or having to adjust the derailleur when I swap wheels on the bike.
As Sheldon Brown has pointed out, if you have a modern hub it will fit an 11T cog. That being said, you may have to adjust the derailer a bit to get ideal performance when using the 11T cog. You'll have to experiment a bit, but you should be able to set it up to shift well with both the 11-21 cassette and the 12-25.
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Old 01-27-07, 12:31 PM   #4
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Thanks for the posts. As predicted, I got the cassette on the wheel just fine.
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