Hope XC 31.8mm Bar Clamp Stem - 1 1/8th Inch Steerer - 31.8mm - 70mm - 0 Degree - Orange YGroup_7083817271341 The effective rim diameter is

The effective rim diameter is where they differ:

Elasticised cuffs offer secure fit and comfort

Engagement:  A reasonably fast 7 degrees

riding characteristics

cinch it down

Hope XC 31.8mm Bar Clamp Stem - 1 1/8th Inch Steerer - 31.8mm - 70mm - 0 Degree - Orange YGroup_7083817271341 The effective rim diameter isOptimised for the perfect balance of weight and stiffness. Gone are the days that XC meant noodly handling. Hopes new stem is designed to cope with the extremes of a modern XC race course, without carrying so much as an extra gram of weight. Whether crossing continents, or smashing laps, theyve got your back. Features: Available in 70mm or 90mm, 0 rise CNC machined from 2014 T6 Aluminium Stainless Steel bolts: 70mm: 136g; 90mm: 149g Available in