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Merlin Cycles£249.00Visit shop Troy Lee Designs Black Troy Lee Design D4 Shadow Poly Full Face Helmet - / Large
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The Troy Lee Designs D4 Shadow Poly Full Face Helmet is engineered for gravity-focused mountain bikers and downhill racers who prioritize high-level safety without moving to a full carbon construction. Its standout benefit is the integration of the Mips C2 rotational impact protection system, which offers superior brain protection during angled impacts; however, potential buyers should note that the polyacrylite shell is heavier than its carbon fiber counterparts, which may cause neck fatigue during exceptionally long days in the saddle.
| Age Group | adult |
|---|---|
| Colour | Black |
| Gender | Male |
| Model Part Number | 174499004 |
| Brand | Troy Lee Designs |
Yes, the full-face coverage and impact protection ratings make it suitable for BMX and mountain bike racing.
The visor is designed to be adjustable to accommodate various riding positions and goggle styles.
Yes, TLD offers replacement comfort liners that can be removed for washing or replacement.
It is recommended to replace any helmet after a significant impact, or every 3-5 years due to material degradation.
The Mips C2 system is an integrated part of the safety design and should not be removed by the user.
Adjust the internal padding thickness or check that the rear fitment system is correctly seated.
Clear the front intake vents and side Power Grid meshes of any mud or trail debris.
Ensure the goggle strap is positioned correctly on the rear recess of the helmet and try adjusting the visor position.
To ensure proper fit, measure your head circumference above the eyebrows and refer to the manufacturer sizing chart. Always ensure the chin strap is tightened securely before every ride, leaving only enough room to fit two fingers between the strap and your jaw. For care, remove the comfort liner and wash it by hand with mild soap and cold water, allowing it to air dry completely. Do not use chemical solvents or harsh detergents on the outer shell, as these can degrade the structural integrity of the polyacrylite material. Inspect the shell and internal Mips liner after any significant impact, replacing the helmet if any cracks or signs of damage appear.
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