Quote:
Originally Posted by Adam Ef
Does it skip forwards in every gear on the back? If so, it's likely the front. Worth trying stamping on the pedals with it in the smaller sprockets in the back, first on the inner front, then on the outer front. You might find it's the smaller ones on the back that are causing the skip forwards as that's the most common. Chain may be ok but smaller rear sprockets might not. Is it the first chain that's been used on that cassette or has it had a couple? Cassettes usually last 3 chains, if chains are changed before they start to wear.
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Thanks Adam,
I'll give that a go. The sprocket and chain have less that 500 miles on. However when the bike is in its highest gear i can lift the chain off the big ring at the front by about 8mm. The teeth look worn and hooked on the big ring.