Spare wheel - reindex why?

[mikees]

I wanted a dedicated trainer wheel /Tyre and have exactly the same as my road wheel ( askium with 30-12 tiagra cassette with correct spacers )

Road wheel fine - new wheel jumps gears and miss changes

It’s exactly the same! Any ideas ?



Mike

[anonymous-user]

Are both cassettes identically worn?

Is it a symptom of the indexing being out, or of a chain & cassette that haven't worn together making that known?

[mikees]

JPJPJP said:

Are both cassettes identically worn?

Is it a symptom of the indexing being out, or of a chain & cassette that haven't worn together making that known?

Think it’s this - will try a new chain set and possibly another new cassette - none of them are that expansive

[Bobley]

Make sure that you have the same thickness spacer behind the cassette (assuming they're relatively recent as the newer Aksium is 11 speed and Tiagra is 10 speed.).

[fromage]

Measure the distance between the dropout/frame and the 11/12T on the cassette, have seen some wheels where the distance varies and therefore require a reindex