Cassette wear?

[Aki]

Hi
I had a similar problems in the past with my cassette.
There are commercial tools available to check for sprocket wear,but I check mine with the blunt end of a 10mm twist drill bit .
If the sprocket is in good order the 10mm drill bit will fit snugly in the valley between the teeth and will not rattle side to side.
Try it on a gear you don't often use for reference.
If there is anything more than a slight bit of play your cassette is on the way out .

I change my chains at 0.5% wear and find the cassettes last a much longer.

If you dont fancy the 10mm drill route,putting a new chain on will confirm a worn cassette , the new chain will jump more than the old one did on a worn cassette.

If your chain and sprockets do turn out to be OK , the ratchet in your free-hub may be slipping occasionally this can feel like your chain is jumping.

Anyway good luck

Paul

 

[Avc97]

Attached further photos. Doesn’t appear to have any wear?

 

[soundwave]

id say the chain is to short.

 

[Avc97]

Update: I’ve taken the bike to the shop I purchased it from, have just spoken to them and they’ve confirmed it’s a problem with the motor and are awaiting replacement parts from Giant.
Thanks everyone for your help.

 

[vfr400]

Hi
I had a similar problems in the past with my cassette.
There are commercial tools available to check for sprocket wear,but I check mine with the blunt end of a 10mm twist drill bit .
If the sprocket is in good order the 10mm drill bit will fit snugly in the valley between the teeth and will not rattle side to side.
Try it on a gear you don't often use for reference.
If there is anything more than a slight bit of play your cassette is on the way out .

I change my chains at 0.5% wear and find the cassettes last a much longer.

If you dont fancy the 10mm drill route,putting a new chain on will confirm a worn cassette , the new chain will jump more than the old one did on a worn cassette.

If your chain and sprockets do turn out to be OK , the ratchet in your free-hub may be slipping occasionally this can feel like your chain is jumping.

Anyway good luck

Paul

That's a ridiculous test. The teeth and valleys on cassettes are all different shapes to aid shifting.