Originally posted by MichaelW
Its called a tyre boot, and you can use anything strong enough, wrappers, duck tape, stronger paper money.
Last year I rode my MTB with a piece of cardboard over a sidewall gash for the last 2 months of the season. Even won my last race with it.
I've also booted a cut tire with dollar bills on high psi road tires on more than one occaision.
Once I forgot I used a $5 bill. The tire was still in pretty good shape, so I kept riding on it. At the end of the season I changed tires, and, wa-la, out popped 5 bucks. I'm not convinced that a 5-spot works any better than a single, though.
So, I usually have a buck or two on me when I ride. You never know, you may need lunch money in December.