Troy Lee Designs D4 Carbon MIPS BMX Race Helmet-Inferno Gray Helmet Size:Adult X-Small These bolts are also compatible

These bolts are also compatible with Madera 3/8" hubs

75" HEAD ANGLE: 74° SET TUBE ANGLE: 71° POST SIZE / CLAMP SIZE: 27

: super lightweight alloy frame

Fits wheel sizes 20"-29" and is not compatible with plus or fat tire wheels

AXLE: 10x110

Troy Lee Designs D4 Carbon MIPS BMX Race Helmet-Inferno Gray Helmet Size:Adult X-Small These bolts are also compatibleThe Troy Lee Designs D4 Carbon MIPS BMX Race Helmet weighs in at just about 1 kilogram making it one of the lightest helmets in the game. The D4 incorporates the MIPS brain protection system to help prevent rotational stress resulting from angled impacts. Instead of steel, the D rings are titanium to get just that little extra bit of weight saving. The EPP collarbone impact system is a specially designed area to help mitigate helmet collarbone