Originally Posted by
dsbrantjr
Helicopter tape. That's really what it's called. Good for chainstays where they get hit by the chain and for frame areas like head tubes abraded by cable housings, too.
This^^^ Polyurethane tape is what this is for googling purposes. Get the outdoor, UV resistant version. I wouldn't be surprised if the crankskins are made of this stuff but as they are already perfectly pre-cut to fit your cranks their price isn't all that bad. Although for about the same price you could get enough helicopter tape to do a few other parts of your frame as well.