City approved. Trail tested. Designed for both road and trail, the new Challenger 7 has been completely redesigned. Combining a simplified mesh upper with new soft foam, an increase in stack height for a more comfortable feel and the addition of the exclusive rubber to the lower unit, plus a reinvented outsole for a better ride while -ground. Inspired by gravel tyres, smaller, tightly spaced knobs in the center and larger, more aggressive knobs on the perimeter are added to improve grip on rough terrain.