When we're in the market for a rear tire on our cross-country race machines, we immediately turn to the Schwalbe Thunder Burt Addix Evolution 29in Tire. This hyper-fast-rolling tire is a speedy addition to our ride with plenty of contact points and aggressive side knobs. We're rolling up to speed and getting through this 2-hour XC race in just an hour and a half with this quicker-than-quick rubber on our rides. Speedy rear tire for cross-country use Speedy Addix rubber compound rolls up to speed quickly Ideal in hardpack race situations Race Protection cuts down on weight while still protecting sidewall Tubeless-ready tire allows for lower tire pressure