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  • So just got my new H+Son wheels built by Arup (fantastic job - see pics) on the bike with a new 18t EAI cog on the rear. Problem is when I put the chain around the cog it doesn't want to sit properly in it. Will only sit in a couple of the gaps between the teeth. What the fuck is wrong ?

    Am I missing something stupid ? The front is a 48 if that helps....and I'm sure that it's 1/8 as the old one and new one is

    Any help appreciated as it driving me crazy as I just want to take it out for a spin.

    Cheers

    CMC


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