Take a standard knackered gearbox sprocket, cut the teeth off then turn it down to fit inside a suitable piece of tube and machine the centre out of another sprocket to fit over the tube. Fasten it to the bike and slide it until the chain line is as required, cut the tube to length then weld it up (or in my case get someone who can weld properly to weld it up). Bottom pic is an 18t we did for Old Blu' last time, going for a 20t this time for "tourability"
Friday 8 March 2013
Dr SPROCKET
Take a standard knackered gearbox sprocket, cut the teeth off then turn it down to fit inside a suitable piece of tube and machine the centre out of another sprocket to fit over the tube. Fasten it to the bike and slide it until the chain line is as required, cut the tube to length then weld it up (or in my case get someone who can weld properly to weld it up). Bottom pic is an 18t we did for Old Blu' last time, going for a 20t this time for "tourability"
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1 comment:
Nice Mod Pete....Much better than an 1 1/4" offset !!
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