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Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet
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Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 1
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 2
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 3
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 4
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 5
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 6
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 7
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 8
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 9
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Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 1
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 2
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 3
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 4
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 5
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 6
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 7
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 8
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet red/white L (58/59) Figure 9
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Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet

$474.29 You are saving $71.14

$403.15

Price excluding VAT, plus shipping

Color: red/white
Size :
Size table Size table

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This product will be released on 24 November 2026

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Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet
Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet
Color: red/white
Size: L (58/59)
$474.29

$403.15

Seen at a lower price elsewhere? Question about the product
Description

Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet

The D4 Polyacrylite brings all the safety and comfort features of the D4 family into a price-conscious shell — without compromising on any of the details that have made the D4 the most coveted full-face in mountain biking. Mips® C2, a front air intake system, and quick-release anatomical 3D cheek pads with Emergency Release System deliver the protection and fit that downhill and BMX riders demand, now in a shell designed to reach more riders than ever.

Features:

  • Mips® C2 Rotational Impact Brain Protection System
  • Advanced Polyacrylite shell construction
  • Front air intake system with high-flow polymer center and power grid side mesh
  • Collarbone Suspension System
  • Anatomical 3D contoured cheek pads with Emergency Release System
  • Quick-dry padding
  • Breakaway visor screws

Specifications:

  • Polyacrylite outer shell in three sizes (XS/S – M/L – XL/XXL)
  • EN 1078 / ASTM F1952-DH / ASTM F2032-BMX
  • Range of use: Downhill, BMX race
  • Weight: approx. 1150 g
  • Closure: D-ring
  • Ventilation: 16 ports
  • Equipped with Mips® C2

Contents:

  • 1x Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet
  • 1x Helmet bag
Color: red/white
Size: L (58/59)
Helmet Type: Downhill Helmets
Features: Emergency System Padding (EQRS)
Gender: Unisex
Material: Thermoplastic
Season: All-weather
Closure type: Double-D
Application area: Downhill / MTB

Size table for Troy Lee Designs D4 Polyacrylite MIPS The Line Downhill Helmet:

Measurements in:
cm
Size Head Circumference (cm)
XS 53-54
S 55-56
M 57-58
L 58-59
XL 60-61
2XL 62-63

How to measure your height:

Sizing Info
1 Head circumference

Measure your head circumference by placing the tape measure horizontally around your head. Guide it about one centimetre above your eyebrows across your forehead and around the widest part at the back of your head. Make sure the tape stays at the same height all the way around and is neither slipping nor too tight so you get an accurate measurement.

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