Improving upon the class-leading D3 helmet was no simple task, but Troy Lee Designs is never one to rest on its laurels. Built with an aerospace-grade composite shell, the new D4 Composite helmet weighs in at just 1050-grams without sacrificing any of the strength of the previous model. MIPS C2 protection system is used to mitigate rotational impacts, while the front air intake system with 24 vents keeps your head cooler than ever during intense rides. Washable X-static and XT2 anti-odor padding keep the inside of the helmet feeling fresh, and there's now an EPP collarbone impact system that helps reduce the forces transferred to this sensitive area.
Improving upon the class-leading D3 helmet was no simple task, but Troy Lee Designs is never one to rest on its laurels. Built with an aerospace-grade composite shell, the new D4 Composite helmet weighs in at just 1050-grams without sacrificing any of the strength of the previous model. MIPS C2 protection system is used to mitigate rotational impacts, while the front air intake system with 24 vents keeps your head cooler than ever during intense rides. Washable X-static and XT2 anti-odor padding keep the inside of the helmet feeling fresh, and there's now an EPP collarbone impact system that helps reduce the forces transferred to this sensitive area.
in 1 offers
The lowest price for Troy Lee Designs D4 MIPS Stealth BMX Race Helmet-Gray, XX-Large right now is $340.80 at J&R Bicycles BMX Super Store.
The all-time low was $336.54 on 11 Mar 2026 — today's price is 1% above the lowest ever. This is at or near its all-time low — a good time to buy.
Prices last updated 21 Mar 2026.
Troy Lee Designs D4 MIPS Stealth BMX Race Helmet-Gray, XX-Large
Improving upon the class-leading D3 helmet was no simple task, but Troy Lee Designs is never one to rest on its laurels. Built with an aerospace-grade composite shell, the new D4 Composite helmet weighs in at just 1050-grams without sacrificing any of the strength of the previous model. MIPS C2 protection system is used to mitigate rotational impacts, while the front air intake system with 24 vents keeps your head cooler than ever during intense rides. Washable X-static and XT2 anti-odor padding keep the inside of the helmet feeling fresh, and there's now an EPP collarbone impact system that helps reduce the forces transferred to this sensitive area.
Improving upon the class-leading D3 helmet was no simple task, but Troy Lee Designs is never one to rest on its laurels. Built with an aerospace-grade composite shell, the new D4 Composite helmet weighs in at just 1050-grams without sacrificing any of the strength of the previous model. MIPS C2 protection system is used to mitigate rotational impacts, while the front air intake system with 24 vents keeps your head cooler than ever during intense rides. Washable X-static and XT2 anti-odor padding keep the inside of the helmet feeling fresh, and there's now an EPP collarbone impact system that helps reduce the forces transferred to this sensitive area.
Last updated at 21/03/2026 05:14:25
Troy Lee Designs D4 MIPS Stealth BMX Race Helmet-Gray, Adult XX-Large
| Core Material | EPS Foam |
| Shell Material | Aerospace Composite |
| Adjustable Fit | No |
| Ventilation | 24 Vents |
| MIPS Protection | Yes |
Troy Lee Designs D4 MIPS Stealth BMX Race Helmet-Gray, Adult XX-Large
| Core Material | EPS Foam |
| Shell Material | Aerospace Composite |
| Adjustable Fit | No |
| Ventilation | 24 Vents |
| MIPS Protection | Yes |
