Block and chain
Californiakid
Posts: 2
Hi,
I have a 9 speed block bought with a wheel 2 years ago second hand. I only use them for racing. I am able to ride with the chain i had already on the bike on the 52 ring with no problems but when i change to the 42 ring the chain slips on about 4 of the gears.
I have now changed the chain for a 9 speed chain (bought new) and again exactly the same happens. It hasn't been a problem in racing as i've never come off the 52 ring but i would like to know why this happening. I would have thought the gears it slips on would slip on both the 52 and 42 ring not just the 42 but maybe they need replacing? I asked one bike mechanic and he said it's the rear mech, any idea's?
I have a 9 speed block bought with a wheel 2 years ago second hand. I only use them for racing. I am able to ride with the chain i had already on the bike on the 52 ring with no problems but when i change to the 42 ring the chain slips on about 4 of the gears.
I have now changed the chain for a 9 speed chain (bought new) and again exactly the same happens. It hasn't been a problem in racing as i've never come off the 52 ring but i would like to know why this happening. I would have thought the gears it slips on would slip on both the 52 and 42 ring not just the 42 but maybe they need replacing? I asked one bike mechanic and he said it's the rear mech, any idea's?
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Comments
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I'd say it was the cassette (being worn), not the mech - if it's slipping. If it's jumping out of gear it could be the rear indexing has gone awry.0
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You can rarely tell just by looking at the thing, but if the chain is skipping forwards on the sprocket teeth I'd say it's a worn cassette. Can occur in one chainring and not the other, but I've never been sure why0
