Stumpjumper Expert Pump Aethos: Billions of calculations in

Aethos: Billions of calculations in the pursuit of one thing—the perfect ride

the seat tube is typically just a "tube" with pivots and BB shell welded on

Computational Fluid Dynamic design integrates the maximum volume of internal channeling for optimal airflow through the helmet

QR pins for easy adjustment or removal

100% Recycled Polyester Wind Shell provides a sustainable solution to wind and water resistance on any trail ride

Stumpjumper Expert Pump Aethos: Billions of calculations inWith the all new Stumpjumper Expert, we've bottled up that "new bike day" feeling and put it into a radical new trail bike so agile, so lively, so in tune with the trail, that it feels like an extension of your body. Levitate up the climbs. Decimate the descents. The Stumpjumper Expert is going to make you rethink how a trail bike should ride. THE TRAIL BENCHMARKWhen we set out to design the all new Stumpjumper, we pursued some hefty goals. It had to