Mechanics and Fixing Any Questions Answered

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M_V

Anyone know if small cogs work alright on Sturmey AW hubs? I'd like to build a wheel for my raleight Twenty with one and would need to use a cog around 12 or 13t. Some of the photos of them on ebay make it look like the chain might hit bits of the hub if a cog that small is used.

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gbj_tester in reply to @M_V

for my raleight Twenty with one and would need to use a cog around 12 or 13t

Need? 48/14×4/3×20"=91" top gear, which seems like more than you'd ever need on a shopping bike. Also 68" direct and 51" low are more than I'd want.

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M_V in reply to @gbj_tester

Maybe I need to do my maths. It’s single speed just now and I think it’s on something like 48/14.

Edit: Realise that makes little sense but I'm feeling like it's currently a bit under geared so thinking I'd fit a smaller cog.

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