9 speed cassette on...
 

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[Closed] 9 speed cassette on 7 speed hub

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 pdw
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I'm trying to put some of my old 9 speed kit onto my daughter's bike which has a 7-speed hub. I can do it fairly easily by dropping a sprocket so I've got 8 of 9, but for political reasons (her brother has 9 speed) I wondering if I can get all 9 on.

There's quite a lot of clearance on the between sprockets and spokes so I'm wondering about attacking the hub and/or cassette with a grinder. Anyone been down this route? The smallest sprocket is 11T so I can't do the 11T lockring on 12T sprocket trick.


 
Posted : 08/05/2020 11:25 am
Posts: 3344
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Wouldn't it be easier to find a wheel with an 8 speed hub?
Because that will also fit 9, 10 & 11 speed cassettes.


 
Posted : 08/05/2020 11:50 am
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Just take one sprocket off the other kid's bike so they're equal. Otherwise, upgrade to a newer wheel.


 
Posted : 08/05/2020 12:18 pm
 pdw
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Just take one sprocket off the other kid’s bike so they’re equal.

Good thinking 🙂 I should never have told him it was 9 speed in the first place.

Upgrading to a newer wheel puts it above my budget for this (which is zero). 20" wheels with 8 speed hubs don't seem to be cheaply available, and I don't think any of my parts bin hubs have the right number of spokes to do a rebuild.


 
Posted : 08/05/2020 12:26 pm
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Shimano hub? Fit 8s freehub body, re-space/re-dish etc.


 
Posted : 08/05/2020 12:50 pm
 pdw
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Sadly not. I've got at least a couple of 8 speed FH bodies in the parts bin too.


 
Posted : 08/05/2020 1:10 pm

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