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120 spaced cassette hubs. so I can run a singlespeed with a cassette sprocket. Do these exist?
There are a number of BMX cassette hubs which could work in a 120mm frame with the addition of a few washers. As the ones with ⅜" or 10mm axles are typically aimed at small people with small rims, lower spoke counts such as 24 and 28 are available too.
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This should do the trick:
https://www.veloduo.co.uk/blogs/news/sunxcd-120mm-rear-cassette-hub-conversion
anyway - 120 spaced cassette hubs. so I can run a singlespeed with a cassette sprocket. Do these exist?