Box One Prime 9 Chain:

Spring: DebonAir

This makes a huge difference in pinch flat protection

A wide 11-50t gear range that is a perfect fit for any ride

high-grade steel and features cushioned grips for comfort

Royal Racing Core Short Sleeve Jersey - M - Black Heather Images Uploaded - Ready for Review Box One Prime 9 Chain:Casual yet technical, fast wicking, UV and antimicrobial treated. Looks and feels like a cotton t shirt. This 85% Polyester 15% Cotton mix looks like your favourite tee but performs like a tech ride jersey you won't believe the performance until you try it. The Core jersey also drys up to 4 times faster than cotton. Core Jerseys are UV Treated and you might think this an extravagance for a company with its roots in the Pennines and Welsh Valleys.