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Free UK Shipping Over £50 & Easy Returns





Free UK standard shipping on orders over £50
The Troy Lee Designs D4 Carbon Helmet sets the benchmark for full-face protection in mountain biking and BMX disciplines. Engineered with a carbon composite shell, it perfectly balances lightweight design with uncompromising safety, making it a top choice for riders seeking elite performance. The inclusion of Mips® C2 rotational impact technology, along with an EPP chin bar, ensures superior protection against a variety of impacts.
Designed for comfort and practicality, the helmet features a removable snap-in liner made from moisture-wicking materials that keep you cool and dry during intense rides. Its anatomical "3D" contoured cheek pads come with an emergency release system, providing added safety for EMS responders. With three shell sizes available, the D4 Carbon offers a tailored fit for diverse head shapes and rider ages, enhancing both protection and comfort.
Additional thoughtful details like super-light titanium D-rings and smart sheer breakaway visor screws demonstrate Troy Lee Designs’ commitment to innovation and rider-centric design. This helmet meets or exceeds CPSC 1203, CE EN1078, ASTM F1952-DH, and ASTM 2032-BMX safety standards, ensuring reliable certification for competitive and recreational riders alike. Explore the full range of Troy Lee Designs helmets and gear to enhance your ride.
Does the D4 Carbon Helmet come in different sizes?
Yes, it is available in three shell sizes to provide a precise fit for various head sizes, along with multiple hat size options from XS to XXL as detailed in the sizing chart.
Is the helmet suitable for both downhill and BMX riding?
Absolutely. The D4 Carbon Helmet is designed to perform at the highest level in both downhill mountain biking and BMX disciplines, meeting all necessary safety standards for these sports.
Stock Status Instock - Instore - Item Usually shipped or available for shop collection, within 48 hours (Mon-Fri)
Instock - Supplier Warehouse - Item is held in Suppliers Warehouse, Depending on the the supplier transfer time can vary from 24 Hours to 14 Days for item held in European warehouse.
(over festive periods some suppliers shut from 24th Dec-2nd Jan so orders can be delayed through this period.)
Brands held in European website include Trek, Bontrager, Electra, Wahoo, Rapha. For up-to-date transfer times please call customer services on +44 (0)1782 768622
Most out products are shipped by FedEx, providing unprecedented reliability and speed. Lightweight Spares below £25.00 value have a Royal Mail postage option, which is sent via Tracked 48 service. - £2.99
Shipping on all Domestic Orders over £50.00 (excluding bikes and home trainers) for delivery within the UK is completely FREE!
Bike and Home Trainers and oversize Goods £15.00 - FedEx
White Glove Bike Delivery - our white glove option has your bike personally delivered to you by a fully trained Mechanic and Bike fitter - £99.99
(Certain bikes will only have this option such as Cargo Bikes)
To Qualify for FREE Shipping:
In some cases, we may ship items out with another courier, depending on the status and availability of items ordered. (Customers will not be charged more and will be refunded any unused postage cost) If part of an order is cancelled and the total drops below the £50.00 free postage, a postage charge may be taken.
Delivery costs will be clearly stated on the checkout page, though you will need to register (to provide your delivery address) in order to see the delivery costs.
If you have any questions about delivery charges, times or none delivery please do not hesitate to get in touch by email:store@swinnertoncycles.co.uk or by telephone on +44 (0)1782 768622. Handling is normally 48 hours, but at busy periods this may be extended but we will endeavor to process your order within 5 working days. Please bear in mind in some cases orders can take longer to process, please contact us for more details.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.










































































































