Mechanics and Fixing Any Questions Answered

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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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gbj_tester in reply to @M_V

I'm feeling like it's currently a bit under geared

But it probably won't feel undergeared if you have the upshift option. Anyway, sprockets are cheap so get 13 and 14 and see how it goes.

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