Chain slipping under pressure

undapressure

Hi

I have just had the chain, front chainring and rear mech replaced. Now, when I put some power down, the chain slips, but when pedalling normally it is fine.

Is this beacause the cassette is worn? Its only 20-30 rides old.

Seems to be in the middle range of cogs it slips which are the ones I mainly use.

Thanks

nicklouse

is it the chain?
where is it slipping?

could be many things including poor set up and worn parts.

undapressure

I assume it is the chain, it just feels as if it slips a tooth when you put a bit of power on the drivetrain.

Can't really tell where it is actually slipping. Whole drivetrain is new except for the cassette. Could it be that the cassette is loose?

MickyDub

Rear cassette will need to be replaced too in my opinion.

jonnyc2420

ive just found ive got the same after replacing my chain, my rear cassette is roughly the same as yours in terms of age 20 - 30 rides roughly 10 - 15 miles each time. using a raceface evolve xc chainset and a KMC X9L Gold 9 Spd Chain - feels like the chain slips a tooth in most gears under power but fine under normal conditions. hard to tell if this is 'slipping' because its only feels like one tooth then its ok again. - surely the cassette cant be fubar after such little time?

jonnyc2420

just replaced the cassette and it was the cause of my slippage - it was really hard to see any difference even when new and old were compared together, but has definatley solved the problem!