12-25 to 11-32 conversion

[T4tomo]

The suggestion was (imo) to read the leaflet for the mech that came with the bike (Which is 8 years old and the OP had bought second hand)…not to go online and look up the technical information for the mech

really?

Look at it, either in paper form or online and you’ll have your answer.

 

[vickster]

really?

I only saw post #20… my bad

 

[fraz101]

Unless the chain is on the short limit now, going from 25t to 28t will probably be OK without an extra (inch) link. Also see @roubaixtuesday 's sound advice (cross-post) ref wear. I would buy a chain as well so that if the old chain skips on the new cassette, I can take immediate remedial action.

The chain is brand new It was replaced last year and hasn’t been used since.

I will try 12-28 before anything else.
I don’t want to change the front chain rings.

 

[fraz101]

Went out and did 2500ft of climbing yesterday on the 25t over Dukes Pass (popular hill climb here)

I managed pretty well on the 25t. Will try a few more hills before deciding.