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9 to 8 speed cassette needs new free hub?

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9 to 8 speed cassette needs new free hub?

Old 05-23-14, 03:47 PM
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lungimsam
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9 to 8 speed cassette needs new free hub?

How can I tell if I need an 8 speed freehub, or if the one I have with the 9 will work?

The new cassette will have the same size outer cogs (11-32T).

Last edited by lungimsam; 05-23-14 at 03:52 PM.
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Old 05-23-14, 03:55 PM
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If it doesn't work it can be made to work with a spacer. Even if it does work you may want to add a spacer to get a perfect chain line. Some cassettes have blobby soldered-in pins (or maybe tack-welded?) that won't work so well with some spacers. Zig-zaggy type spacers can sometimes avoid the blobs, but to make sure get a grinder or file and work them down a little flatter.

spacer


Zig Zaggy spacer

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Old 05-23-14, 06:12 PM
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Originally Posted by lungimsam View Post
How can I tell if I need an 8 speed freehub, or if the one I have with the 9 will work?

The new cassette will have the same size outer cogs (11-32T).
All Shimano freehubs that take a 9-speed cassette will also take an 8-speed or a 10-speed cassette. No extra spacers are needed for the 8-speed. You would need a 4.5 mm spacer to fit a 7-speed cassette and a 1 mm spacer (it comes with the cassettes) to use a 10-speed cassette.
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Old 05-23-14, 08:02 PM
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Originally Posted by HillRider View Post
All Shimano freehubs that take a 9-speed cassette will also take an 8-speed or a 10-speed cassette. No extra spacers are needed for the 8-speed. You would need a 4.5 mm spacer to fit a 7-speed cassette and a 1 mm spacer (it comes with the cassettes) to use a 10-speed cassette.
HillRider's got it, as usual.

Short version: you do not need a different freehub.
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Old 05-24-14, 07:30 AM
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Thanks, y'all. Glad to know I am not opening a can of worms with this mod.
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