Troy Lee Designs GP Silhouette BMX Race Helmet-Black/Gray Helmet Size:Youth Medium SRAM 22/24mm cranksets are usable

SRAM 22/24mm cranksets are usable with a separate adapter

each size is proportionally tapered

360-degree seamless construction for comfort

Youth: Typical rider from ages 8-13

Aluminum Cones

Troy Lee Designs GP Silhouette BMX Race Helmet-Black/Gray Helmet Size:Youth Medium SRAM 22/24mm cranksets are usableThe Troy Lee Designs GP Silhouette Helmet Black Gray is both lightweight and durable with a 1500 gram polyacrylite shell. It features 16 air vents to keep your noggin cool while pedaling hard. For added safety there is an emergency release system for first responders. Comes in three shell sizes to fit old heads, small heads, big heads, bald heads. A Troy Lee Designs helmet sock is included. SPECIFICATIONS Technoligically advanced polyacrylite shell