I am looking at getting a new (used= new to me) set of wheels for my bike.
The price is right, they look good, and It seems like they WILL hold my butt up pretty reliably. The problem is...
They are equipped with 8-9 speed compatible Ultegra hubs. My bike is currently equipped with RX-100 hubs w/ a 7-speed, hyperglide cassette (12-28). It IS a cassette and not a freewheel, which a few people have asked since I've been wheel shopping. I read up on the things @ Sheldon Brown's, and I think I'm more confused now than I was before.
I think my concerns are...
1) Will my 7-speed cassette fit onto the 8-9 hubs?
1a) if not, then can I buy a newer cassette that WILL work without having to upgrade the entire drivetrain?
1b) If not, what CAN I do to put new wheels at the least cost?
2) Frame spacing. Sheldon says that 7-speeds ususlly have 126mm spacing and 8-9 speeds are @130mm. I measured between the inside faces of the dropouts. 5-1/16 inches. Arrgh, which size is it? 126 or 130? 128???