Schwalbe Thunder Burt Tire - 29 x 2.25 Tubeless Folding BLK Evolution Super Ground Addix Speed ModelNumber=25104 } Features an ergonomic curve

} Features an ergonomic curve to support the sit bones and a generous cutout to relieve perineal pressure

100% CroMoly construction fully brazed crown single eyelet dropouts and cantilever bosses

Features a flat seat for dynamic sitting in different positions without tilting effects

P Zero SmarTube is the most advanced inner tube in the range

Aluminum lever blade and steel hardware ensure durability

Schwalbe Thunder Burt Tire - 29 x 2.25 Tubeless Folding BLK Evolution Super Ground Addix Speed ModelNumber=25104 } Features an ergonomic curveSchwalbe Thunder Burt Tire 29 x 2. 25 Tubeless Folding Black Evolution Super Ground Addix Speed. Schwalbe Thunder Burt Tires. The development goal of this tire was to combine the best of the Racing Ralph and Furious Fred. With its many small lugs it has the grip of the Racing Ralph but the low rolling resistance of the Furious Fred. PaceStar: fast rolling cross country compound with easy rolling base layer fast center and grippy shoulders TECH SPECS