I have a 2002 Orbea with DA 9 speed. The bike came with 53/39 up front and a 11-23 cassette.
That combo has served me well so far but I am doing longer rides now with more hills. I have an old 1980s Trek 500 sports bike that has a 12-32 cassette; I tried to swap rear wheels but the Orbea's DA would not climb on to the largest two cogs.
I bought a spare rear wheel and mounted a 11-26 cassette. I still had a little difficulty getting the lowest cog but it made it, albeit with rub on the jockey pulley.
I turned the B-tension screw all the way in and there seems to be plenty of clearance now (I started getting clearance about 2/3 in, but went further to be safe). So far, I've only used the bike on the trainer with this wheel, not out on the road.
I have a 10-week SIG training coming up so I was gonna bring the bike in to a shop for a general tuneup tweak, new cables, etc. My questions:
If they adjust everything for the 26t low, will it mess up the shifting on the 11-23 wheel if I go back and forth between wheels/cassettes?
Fwiw, the 11-23 is a Dura Ace cassette, the 11-26 is a SRAM (the more expensive one with the orange spacers). The chain is the Shimano original.