Raise your bar and save your back. The Delta Alloy Stem Raiser Pro lets you increase your bicycle's handlebar height by up to 4.6" for a more comfortable, upright position. Installs easily on any bike with a 1 1/8" threadless steerer tube. Features: Increases bar height up to 4.6" Polished aluminum with anodized finish resists corrosion Machined aluminum top cap is threaded for easy installation Forged and heat treated for extra strength Compatible with 1 1/8" threadless steerer tubes