3T Apto Pro Stem3T's Apto Pro Stem is manufactured from 6061 aluminium and offers an excellent strength-to-weight ratio and weighs only 164g in its 110mm size. It benefits from 3T's long history of producing high-performance components with elegant Italian style and features a unique reverse bolt design. This helps the Apto to have a clean look and its wide bolt spacing improves the faceplate's connection with the handlebars.Features:  Material: AL 6061  Finish: Shot peened, black anodised  Steerer Diameter: 1 1/8”   Angle: ±6°  Clamp Diameter: 31.8mm  Bolts: Steel bolts  Stack: 40mm  Key Size: 4mm Allen key  Reverse bolt design  Weight: 164g (110mm)Buy 3T Components from Chain Reaction Cycles, the World's Largest Online Bike Store.