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The Troy Lee Designs D4 Polyacrylite Helmet is a lightweight, strong full-face helmet designed for downhill and BMX safety and comfort.
The Troy Lee Designs D4 Polyacrylite Helmet is a lightweight, strong full-face helmet designed for downhill and BMX safety and comfort.
Troy Lee Designs

Troy Lee Designs D4 Polyacrylite Helmet The Line Grey

£300.00
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Troy Lee Designs D4 Polyacrylite Helmet The Line Red
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.

Returning an item

Online or in-store purchases can be returned to any of our 12 stores free of charge or can be returned by post or courier at your cost after completing the online returns form below. If you are returning an item due to a fault, we will refund your postage costs.

Bikes & Bulky items

If you wish to return a bike or bulky item to us, please keep the box it arrived in and let us know by contacting our support team via our online webchat, email or by phone (020 45063856) and we will help arrange a collection.

Non Bike - Customer Returns Form

If you wish to return or exchange an item, please fill out the form below following the steps inside. Returns can be processed quicker if all required information is provided.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Troy Lee Designs D4 Polyacrylite Helmet The Line Grey

Season:SS26

Brand:Troy Lee Designs

Code:TLD17404700LineCharcoal

The Troy Lee Designs D4 Polyacrylite Helmet is a lightweight but strong full-face helmet, designed to keep downhill and BMX aficionados cool and safe. As well as delivering a dose of Troy Lee Designs style, it is also practical, being quick-drying and odour-resistant.

Importantly, it offers many of Troy Lee Designs' best safety features, including MIPS C2 protection against rotational forces, an EPS impact-absorbing liner, and an impact-resistant ABS (Acrylonitrile Butadiene Styrene) shell. It also comes with an adjustable visor that will protect your eyes from flying mud or the sun but can be raised to maximise your visibility if needed.

An impressive 16 vents work to keep you cool as you ride, speeding the air through the front air intake system, then around your head to take away heat. Nonetheless, racing can be strenuous, which is why this helmet includes quick-dry comfort padding, which is also antimicrobial and anti-odour, so that it will feel great and smell fresh every time you put it on.

Strong, dependable, and unmistakably Troy Lee Designs, the D4 Polyacrylite helmet offers the protection and comfort you need for stunting or dialling in your DH riding technique in the run-up to race day. The D4 range expands with this Polyacrylite model, packing the same safety and comfort features as the premium carbon and composite models into a price-conscious shell. Details make the D4 a coveted full-face in mountain biking, including an unmatched anatomical fit.

Product Details:

  • Safety System: MIPS C2 Rotational Impact Brain Protection System.
  • Shell Construction: Advanced Polyacrylite shell construction with an impact-resistant ABS shell and EPS impact-absorbing liner.
  • Ventilation: 16 vents with a front air intake system, featuring a high-flow polymer centre and power grid side mesh.
  • Collarbone Protection: Integrated Collarbone Suspension System.
  • Visor: Adjustable breakaway visor screws to protect eyes from mud and sun.
  • Padding: Anti-microbial, anti-odour, and quick-dry comfort padding.
  • Cheek Pads: Quick-release contoured 3D cheek pads for an anatomically optimised fit.
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