Compatibility Forks with 1 1/8" steerer tubes. Designed for carbon steerer tubes but works with metal steerer tubes with ID from 23.5mm to 24.5mm. Never use a star nut on forks with carbon steerers. weight: 38g Material: 7075-T6 aluminium Insertion Depth: 28mm Stem Cap Bolt Torque Spec: 2-3 Nm with light grease on threads only Expansion Bolt Torque Spec: 5-7 Nm