100% ALTEC MTB Helmet
- ShowProduct Information 100%'s ALTEC is the advanced rider’s choice for confidence inspiring, protective, lightweight and ve... read more
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100%'s ALTEC is the advanced rider’s choice for confidence inspiring, protective, lightweight and ventilated All-Mountain helmet.
Featuring Smartshock® suspended rotational system, the ALTEC’s Smartshock® elastomers reduce energy transfer to the brain over a wide range of speed and impact types.
- Smartshock® - 14 Point Smartshock® Rotational Protective System
- Multi-Density EPS foam - injection molded with polycarbonate
- Massive airflow - With an impressive 15 ventilation ports
- Altec 350g/M-Shell - Expanded coverage while still lightweight
- Sunglass Storage - Integrated sunglass storage system
- Multi-point adjustable visor designed - For maximum vision and goggle stowage
- Anti-Microbial liner - Washable, moisture-wicking
- Adjustable Ratcheting Fitment System
- Nexus Push Release Snap-Buckle
- Size-specific molds - XS/S, S/M, and L/XL
In The Box:
- Extra comfort-liner for customized fitment
Occasionally, without notice, manufacturers change product design and/or specifications.
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100% Size Guide
100% Helmet Size Guide
Size Guide - Adult Helmets
|Head Circumference||Liner Size|
|XS||20 7/8" - 21 1/4'||14 mm|
|S||21 5/8" - 22"||12 mm|
|M||22 1/2" - 22 7/8"||12 mm|
|L||23 1/4" - 23 5/8"||14 mm|
|XL||24" - 24 3/8"||14 mm|
24 3/4" - 25 1/4"
Size Guide - Youth Helmets
|S||18 1/2"-18 7/8"|
|M||19 1/4" - 19 5/8"|
|L||20 1/8" - 20 1/2"|
Read our clothing size guide for more information on sizing.
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
Buy now, pay 12 months later with interest free credit Pay nothing for 3 or 6 months on orders over £850, or 12 months on orders over £1,500* *Not available through PayPal Credit
Flexible finance options
Choose your term.
Lowest monthly cost
for 6 months
Delivery & Guarantee
UK Delivery Information
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.