After my boyfriend suffered a bad blow on a trip last week, I gave him my only tire boot, so I had to order more. Stumbled across these park tool boots and wow they're expensive but having them saves you a trip and a potentially expensive cab ride home. So if you use them on my road bike I highly recommend cutting them in half as they are too big for a 25mill tire unless you completely tear the tire in half which is fine and you also have six shoes instead of three.