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Does anyone manufacture a 12-32 7-speed freewheel cluster to replace the current 13-28 on my 20" Dahon, with a view to touring with panniers? If that's impossible, & I decide to buy a 20" freehub (cassette) wheel, do I have to specify the hub + cassette width?

  • How many chainrings does it have ? You might be able to get a smaller small. I ended up installing a triple crank on my folder, with a 52/40/28 and an 8 speed cassette 11-34. Gives 15 gear-inches at the low-low end. – Criggie Feb 20 at 7:18
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I decide to buy a 20" freehub (cassette) wheel, do I have to specify the hub + cassette width?

Yes. Many 7 speed hubs were 126mm between the drop-outs. You may also have a 130mm hub. This is very easy to measure, take the rear wheel out and measure the internal distance between the axle dropouts.

Also be aware that 7 speed hubs used a slightly narrower freehub body (where the cassette slides onto the hub) that later 8 and higher hubs. You can put a 7 speed cassette with a 8+ speed hub with a spacer.

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