Now I caught your attention replaced the chain on my bike, manual says dont run new chain with old sprockets. If I replace chains on everything I own then technically all sprockets need replacing too, bicycles?? meh! What is the reason behind this one little comment in my manual that has no explaination. If the teeth are worn at a particular angle then they can be reshaped but Im not seeing the link here. Yes I always lube before every hard and fast ride
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