Troy Lee Designs D4 AS Composite Helmet Derrailleur Hangers “How do we bring pro-level

“How do we bring pro-level performance down to a price more riders can afford

compatible Edge bike computers or Garmin smartwatches

3DF AirFit ventilated soft impact foam (back)

Our classic models feature lenses engineered for impact resistance

Troy Lee Designs D4 AS Composite Helmet Derrailleur Hangers “How do we bring pro-levelAlways Evolving. Built with an aerospace shell design and materials, we were able to get the D4 Composite helmet to 1050 grams without sacrificing any strength. Mips C2 protection system is used to add an additional layer of safety in the event of a fall. For comfort, the D4 Composite routes cooling air through a front air intake system that flows through the polymer center and power grid side mesh keeping your head cooler during the ride. X static