I guess it depends on the tire the OP is using. If he has cheap Kendra or no name tires, I would use Tuffy Tire liners. Yes you do get pinch flats at times but this doesn't happen alot. On the other hand, once the Kendra tries start to wear down, you will get ALOT of flats. With the liners, you can really wear out cheap tires all the way though to the liner! The liners give you more miles on cheap rubber.