Troy Lee Designs A1 Mips MTB Cycling Helmet
- ShowProduct Information Five-Star Rated By VA Tech Helmet Lab Troy Lee Designs introduced the A1 helmet in 2013 and it is st... read more
- Show Reviews & Q&As
- Show A1 Helmet Sizing
- Show Mountain Bike Helmet Guide
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Five-Star Rated By VA Tech Helmet Lab
Troy Lee Designs introduced the A1 helmet in 2013 and it is still one of the most comfortable MTB helmets on the market, made even safer with the addition of MIPS rotational brain protection.
This lightweight, fully encapsulated all-mountain helmet utilizes maximum coverage and dimension to keep you safe and protected in all riding conditions. When the action heats up, the 8 intake and 8 exhaust vents allow air to flow through the helmet and cool the head. The moisture-wicking one-piece anti-microbial liner sheds water quicker than regular padding and is washable.
- Reinforced polycarbonate shell in-molded with the EPS liner extends down the sides and back of the head for maximum protection and durability
- MIPS brain protection system reduces rotational forces to the brain
- 8 pressurized intake passages draw in cool air for maximum ventilation
- 8 rear vacuum vortex outlets help exhaust and draw heat from the head
- Triple position adjustable retention system allows customized fit for various eyewear, head shape and riding styles
- Single-piece, ultra-plush, removable and washable comfort liner made of anti-microbial moisture-wicking material for a dry, comfortable feel
- Full-spectrum adjustable moto inspired visor with anodized aluminum hardware
- 5-Star Rated by the VA Tech Testing Institute Bicycle Helmet Testing
- CPSC 1203, CE EN 1078, AS/NZS 2063 certified
Occasionally, without notice, manufacturers change product design and/or specifications.
A1 Helmet Sizing
Troy Lee Designs A1 Helmet Size Guide
How to measure
To find the circumference of your head, place a tape measure in the centre of your forehead, wrap it around above your ears and around the back of your head. If there's a slight difference between two different sizes, always go for the tighter size.
A1 Helmet Size Chart
Youth / XS
48 - 55
54 - 57
57 - 60
60 – 62
21 ¼ - 22 3/8
22 3/8 – 23 5/8
23 5/8 – 24 3/8
Please note, all size information is provided as a guide - if you're unsure or need any further assistance you can call us on 01792 799508 ... we're happy to help!
Mountain Bike Helmet Guide
How do I apply for finance?
Spend £99 or more at Tredz and you can spread the cost. Pay monthly over 6-48 months, interest free (dependent on repayment terms and amount).
1Fill your basket with everything you want from Tredz and go to the checkout.
2During checkout, select the finance option you want as your method of payment.
3You will be sent to our finance provider's secure server to complete your application.
4Finance providers PayPal & V12 will use the information provided to make a decision and complete checkout if you are approved.Read more about buying on finance
Flexible finance options
Choose your deposit.
Choose your term.
Lowest monthly cost
for 6 months
Delivery & Guarantee
UK Delivery Information
International Deliveries – Temporarily Suspended 11/11/20
Note: We are still offering deliveries to the Isle of Man, Scottish Highlands, Scottish Islands, Channel Islands, Isle of Wight, Jersey and Guernsey. We are no longer delivering to Northern Ireland.
Courier Delivery update: Due to the COVID19 situation, we are currently experiencing some delays with deliveries. Our couriers are working around the clock to get your order to you as soon as possible but there is a potential delay of up to 48 hours . Please check your tracking on track your order here.
Please note on the TNT tracking app it may show your delivery status as ‘Collecting’ (as per image below). This means your delivery has left our warehouse and is currently held at TNT main depot and there could be up to a 48 hour delay.
Please keep checking the TNT tracking for further updates. On behalf of TNT we apologise for any delay and inconvenience this may cause.
We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.
Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.
Please note that Pre-Order dates can sometimes change due to updated stock information.
Click here for more UK and international delivery information.
Returns & Warranty
It's easy to return a product with our 365 day, hassle free returns.
We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).
Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.
If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.
For more information please visit our Returns & Warranty page.
Finance provider options available