Originally Posted by
highroller
i use kevlar beaded tyres but they dont seem to make much difference. after 2 weeks i still got a flat from a small prick

Kevlar beads aren't intended to prevent flats, they make the tire slightly lighter and make it able to be folded. The bead is the wire that goes into the rim of the wheel, and doesn't have any effect on flat resistance. The alternative to kevlar is the traditional steel wire, which is too stiff to be able to fold the tire.
Keith