Question on tube size
I got some new wheels for my tandem today, Rolf Prima Vigors. The tall aero rims required a tall valve stem, and the only thing the LBS had is a 700x18-25 size. The tandem runs 700x28 tires. I installed the 18-25 tubes along with the new wheels and took a quick spin, they seem fine. Am I going to destroy my wheels, break my neck, get arrested, die, etc. if I run these smaller sized tubes? By the way, I am very impressed with the Rolfs, they even came with a test data sheet that shows the tension of each spoke and the runout on each rim. (Reminds me of the data sheets that come with high performance rifles). The butt dyno says they feel alot faster than the DT Hugi/Velocity Dyad 48 spoke wheels I was running before these. And here is an unavoidable gloat, due to a miscommunication during the purchase of the tandem, I got the wheels as a free swap for the stock wheels that came on the bike (CoMotion Speedster). Hats off to Suncoast Bicycles in Inverness, FL!!! There are still a few honest businessmen out there!