I just ran across a great deal on Ultegra/Open pro 650c wheels. I was thinking about getting some slicks to put on my mountain bike for rides on dirt roads with friends with hybrids; something I could pump up and go fast with or to keep my road bike dry on rainy days. So, I know absolutely nothing about 650c whheels; are they interchangeable with 26in. mountain wheels except for the rear axle length? Will the rim line up for V-brakes? I'm looking for a quick swap before a ride. Oh, yes, I have the cassette issue but one question at a time.
