OSPREY Seral 4 - With Reservoir Color:- Aprium Purple Magnetic resistance unit provides a

Magnetic resistance unit provides a quiet and frictionless ride

Wheel Diameter: 20” – 29”

and fun for gravel

Strong enough for any bike

Insert into any Hollowtech II bottom bracket tool for compatibility with newer generation 39mm and 41mm outer diameter Shimano external bottom brackets like those found on Dura-Ace 9000

OSPREY Seral 4 - With Reservoir Color:- Aprium Purple Magnetic resistance unit provides aFor riders looking for a low profile lumbar pack with integrated hydration, 4 liter Seral is the perfect trail companion. This slim waist pack features the next gen 1. 5 liter Hydraulics reservoir with high strength magnetic coupling for improved hose management even in rough terrain and enough storage capacity for ride essentials, such as a spare tube, CO2 and multi tool and, of course, snacks. AirScape backpanel with contouring lumbar wrap provides