Material: Steel

and it comes with a closed resistance unit to reduce noise

Marathon Silica compound for easy rolling and longer life

Trinity (alloy) - 2009-2011

Aluminum crown and lightweight steerer

GIANT Recon E- Bike Headlight - HL600 featured Material: SteelReliable and high quality LED Lamps and strips from leading manufacturer CREE Total internal reflection (TIR) lenses draw LED light into efficient, well controlled beams that maximize the usable lumens in the target area without glare Precisely milled CNC 6061 Aluminum Housing for durability as well as fast heat dissipation IPX6 waterproof rating Different from traditional lithium battery bike lights, RECON E lights are designed to plug into and work