Troy Lee Designs D4 Carbon MIPS BMX Race Helmet-Reverb Black/White Helmet Size:Adult X-Large and a BMX race-specific tread

and a BMX race-specific tread pattern designed to maximize traction out of the gate and around turns

Both 3/8″ and 14mm specific versions

Rim Center Offset (mm): 0 mm

The Box Two Alloy External Bottom Bracket is a great upgrade for your bottom bracket and will work with all 24mm spindles and frames with 68 or 73 x BC 1

Troy Lee Designs D4 Carbon MIPS BMX Race Helmet-Reverb Black/White Helmet Size:Adult X-Large and a BMX race-specific treadThe Troy Lee Designs D4 Carbon MIPS BMX Race Helmet uses advanced tech to provide superior protection and comfort and tops it off with style. TLD has engineered this helmet with increased strength and added durability with very little weight gain. Featuring an integrated MIPS Brain Protection System to reduce rotational forces on the brain caused by impact. Instead of steel, the D rings are titanium to get just that little extra bit of weight saving.