Osprey Seral 7 Lumbar Pack - One Size Postal Blue MFPN=81201010 Promax C-1 chain tensioners are

Promax C-1 chain tensioners are extruded then CNC-machined from 6061-T6 aluminum for optimal strength and low weight

6000 series forged aluminum arms with DUB Spindle Interface

Excellent for most bicycle applications including bearings

The Hylex is a full hydraulic disc brake system for drop bar bikes

-04: Dual Valve head

Osprey Seral 7 Lumbar Pack - One Size Postal Blue MFPN=81201010 Promax C-1 chain tensioners areOsprey Seral 7 Lumbar Pack One Size Postal Blue. The Osprey Seral lumbar pack is perfect for the minimalist looking for something other than a traditional over the shoulder pack. The Seral features a dedicated hydration compartment that stores an included 1. 5L lumbar reservoir and compresses for stable carry. Dedicated hose magnet attaches the bite valve for easy access. Easily accessible zippered main compartment with internal tool organization Dual