5Dev Spindle Taking a Spin With The Spindle If you have 5Dev Crankarms and you don't have a spindle yet, you're in the right place. The 5Dev Spindle is designed to work with 5Dev Cranks. It is available in either 29mm or 30mm and comes in several different lengths including 130mm, 139mm Super Boost, 122mm, and 145mm to fit all your mountain bike needs. Features Diameters available: 29mm, 30mm Lengths available: 130, 139 Super Boost, 122, and 145mm Designed for 5Dev cranks | 5Dev | Spindle 29X130 Dub Boost