When I brought my Cannondale Quick in for a new chain and cassette I decided to buy a second, inexpensive set of wheels (and cassette) as I want to change my tires fairly frequently. I have slightly knobby tires, standard hybrid tires, and a pair of slicks. I brought the wheelset home and put on the hybrid tires. Man, I could hardly get them on. I actually had to use the tire levers to get them on and was extremely displeased. How am I going to change a flat? Well, I discovered that I had bought 26 x 1.5 inch rims and my tires are 26 x 1.25. Odds are that the wheels on the bike are 26 x 1.25. I don't know how all of us erred. I do know that the knobby tires on my original wheels are 26 x 1.7. Right now the bike is at the LBS, I haven't looked at the wheels on the bike to check to see if they are 1.25 inches.
Anyway, what should I do? Should I just put the knobby tires on these rims? Will it work to go back and forth between the wheels when they are slightly wider? Should I see if the LBS will take them back? I wonder about that because I already had tape put in the rims and the cassette installed.
My thumbs hurt. Plus I am extremely irritated that I made this error. For some reason I was sure that the wheels were 1.5 inches.