Had my bike serviced yesterday. Needed a new chain which was a bit of a surprise. The LBS said I should replace the cassette as well so they are compatible. He told he to see how it goes with the current one for a week or so but if it jumps about then changing it would be changed.
Went out this morning and it looks like a change is in the cards as when I stood up to climb a small hill it jumped all over the place.
This made me think. Do I then need to change the one on the trainer as well to avoid the same issues.
Hoping this is not the case