This stem cap is where your bike fashion sense and the weight weenie in you collide. This Ultralight and ultra-sleek stem cap integrates a 15mm headset spacer with your stem cap in a finely machined piece. Why have an extra steerer tube requiring spacers on top of your stem, you ask? Well, many carbon steerers require that the steerer tube extend above the stem. Also, riders may want the flexibility to move the handlebar height up and down for different types of riding or for bike resale. 1 1/8" top (straight 1 1/8" or 1 1/2" to 1 1/8" taper) steerer tubes only 15mm internal cylinder wall heights Light-weight and durable Compatibility 1 1/8" top (straight 1 1/8" or 1 1/2" to 1 1/8" taper) steerer tubes only Related Products Anodized Color Kit Bike Color Accents Tech Specs Weight (cap + bolt): 15mm a 16gMaterial: 6061-T6 aluminumIncluded: Black aluminum boltStem Cap Bolt Torque spec: 2-3 Nm with light grease on threads onlyMade in the USA Patent and trademark information