Troy Lee Designs D4 Composite BMX Race Helmet-Royalty Black/Gold Helmet Size:Adult Small 2mm diameter at the grip

2mm diameter at the grip area to 31

BB: 19mm sealed Mid 8 spline

The Troy Lee Sprint Brushed Jersey- Marine/Teal features a 4-way-stretch rear collar with ever so critical moisture wicking properties

and an internal spline system provides a -10

Troy Lee Designs D4 Composite BMX Race Helmet-Royalty Black/Gold Helmet Size:Adult Small 2mm diameter at the gripThe Troy Lee Designs D4 Composite BMX Race Helmet Royalty Black Gold offers premium protection with an aerospace engineered shell that keeps weight low without compromising strength. Featuring Mips C2 technology for rotational impact protection and a carefully designed ventilation system, this helmet ensures comfort and airflow during intense rides. Inside, X static and XT2 anti microbial padding help maintain freshness, while emergency ready cheek