I understand they are 20g ligher than Velox which is the only rim tape worth using IMHO. I think they rock just for the fact that I know they will never leave sticky crap on the inside of my rim. For $15 for 72 they only cost $5 more than rim tape since you have to buy 2 rolls anyway. An added benefit is that the shops I go to never seem to have the correct width of Velox. They either have MTB tape or the super thin crap that fits no rim I have ever seen or used. With these, you just buy'em and use'em.