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Specialized Ambush MTB Helmet 2018

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Product Description

Equally suited for trail rides, enduro races, and anything in-between, the Ambush provides trail and all mountain riders with the lightest and most ventilated extended coverage helmet available.

  • Patented Aramid-Reinforced Skeleton provides internal EPS support.
  • Patented Energy Optimized Multi-Density EPS construction helps to manage impact energy.
  • Mindset 360 fit system provides a secure, customizable fit with 360-degree tension adjustment, five height positions, and an integrated dial for easy, on-the-fly adjustments.
  • Micro indexing visor allows for a wide range of fast, secure on-trail adjustments, as well as convenient goggle stowage.
  • 4th Dimension Cooling System with massive vents, internal Cross-Channels, and aligned exhaust ports increases airflow to keep you cool.
  • Low profile in-molded shell with smooth, snag-free exterior shape.
  • Extended coverage for added protection and durability.
  • Lightweight, quick-drying liner features a Gutter Action Brow that channels moisture away from eyes.
  • Tri-Fix web splitter for improved comfort and ease of strap adjustments.

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Size Chart

Specialized

Specialized Helmets

How to measure yourself for a helmet
helmet sizing 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.

Sized helmets

SizeCentimetresInches
S 51 - 57 20 - 22½
M 54 - 60 21¼ - 23½
L 57 - 63 22½ - 24¾

Universal helmets

NameCentimetresInches
Flash 50 - 58 19¾ - 23
Sierra 50 - 58 19¾ - 23
Align 54 - 62 21¼ - 24½
Max 56 - 64 22 - 25¼

Kids helmets

AgeCentimetresInches
Toddler 44 - 52 17 - 20½
Child 47 - 55 18½ - 21

Specialized cycling helmets are expertly built to provide the ultimate protection for your head, whatever your cycling discipline. Great ventilation, great fit and great design - the perfect safety accessory.

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

 

Mountain Bike Helmet Guide

MTB Helmets

A mountain bike helmet needs to protect your head, while being comfortable enough to wear all day long. Fit and venting are key, and we will look into this further below. When it comes to protection, all our MTB helmets meet the minimum safety standard (CE EN 1078). Some go much further with enhanced safety features like dual density cores and MIPS.

Features to look out for in an MTB helmet:


Features

Shell

All mountain bike helmets have a hard shell covering the foam core. Nowadays most MTB helmets have in-moulded shells which are bonded securely to the core rather than just stuck on. Some MTB lids have more coverage around the back of the head and are designed for more aggressive trail and enduro riding. The shells on higher end lids overlap the edges to protect the core from wear.

MTB helmet shell

Core

Underneath the shell is the EPS foam core. This is the part of the helmet that will absorb the force of impact if your head hits the ground in a crash. Some higher end MTB lids have dual or multi density EPS cores which offer improved impact protection. Helmets designed for more aggressive riding may features additional ‘Roll Cage’ strengthening elements. These are moulded into the EPS core, and help to hold the structure of the helmet together under impact.

Helmet with EPS foam core

MIPS

A Multi-directional Impact Protection System (MIPS) is fitted between the helmet core and your head. This slip-plane technology reduces the rotational forces that result from certain impacts. Integrated into the fit system, MIPS is found on high-end MTB helmets and takes head protection to the next level.


Fit & Straps

Fit is also an important safety consideration. All MTB helmets have an adjustable fit system that makes sure the helmets stays securely attached to your head. Higher-end mountain bike lids often feature a retention system that wraps around more of your head. This helps to hold the helmet in place for a more secure fit as well as improved comfort. One handed adjustment dials make it easier to get the perfect fit. Chin straps are there to keep your helmet in place even if you take a knock on the head. These straps are fully adjustable on all helmets. Premium MTB lids often have easy fit buckles which make it easier to get your helmet on and off.

Helmet with a correctly adjusted chin strap

Liner

The padded liner is the bit of the helmet that connects directly to your head. If you ride a lot, then features to look out for are quick drying, hydrophilic and anti-microbial padding. These will help keep your head smelling sweetly on every ride. Some high-end lids have systems that the move sweat away from your brow to keep it out of your eyes and off your eyewear.

Some helmet liners use quick drying, hydrophilic and anti-microbial padding

Ventilation

Keeping your head cool as you ride is essential. All MTB lids have vents to keep the air moving over your head and cool you down. Overheating is more of an issue on the climbs as you are moving slowly while putting in a lot of effort. If your ride focus is on rapid climbing, then ventilation is a very important consideration. If you take it easy on the way up, to save your energy for the downs, then you won’t need as much venting. Generally speaking, more and/or larger vents will increase the amount of airflow over your head. While the size and number of vents is important, you should also consider their position. Vents close to the brow offer cooling where you need it most. Internal airflow channelling draws air in and circulates it around your head for more efficient cooling.

Mountain biker wearing a Bell Super 2 Helmet

Visor

Compared to road cycling, you have a more upright position on a mountain bike. This is why mountain bike lids come with visors, to keep the sun or rain out of your eyes. Many MTB helmets have removable visors as some riders prefer to cycle without them. You can raise and lower adjustable visors easily while you are riding. This means that you can move the visor out of the way, for unrestricted vision, when it’s not needed.

Mountain biker with a visor in a low position

Goggle Compatibility

Goggles are a great way to keep dust, and mud out of your eyes on rowdy descents. Some enduro style MTB helmets are designed to work with goggles. Strap grippers on the rear help to keep the goggle in place. High rise adjustable visors mean you can park them on your head when it’s time to climb up for another run.

Goggle straps on a Met Parachute

Action camera mounts

With a dedicated action camera mount, you can attach your GoPro securely to your helmet. Break-away mounts are the safest way to attach your action camera.

Mountain biker with GoPro mounted to a full-face helmet

Weight

A lighter helmet will be more comfortable on your head but may offer less protection than a bulkier lid. Extra head coverage and additional structural elements all add weight. That said even bulky enduro style MTB helmets are lightweight enough for you to wear comfortably on all-day-long rides.

Lighter weight helmets tend to offer more comfort

Sizing

It is important to get a helmet that fits correctly. Simply measure the circumference of your head and match it to the helmet size. Do this by placing a tape measure on the centre of your forehead and wrap it around your head above the ears. See our clothing size guide for more details.

Helmet sizing

Finance

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1Fill your basket with everything you want from Tredz and go to the checkout.

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Delivery & Guarantee

Christmas Delivery

We will try our very best to get your products delivered to you before Christmas, but due to Santa's overspill into our delivery services, we would like to make you aware that while we are making every effort to deliver your order to you in time for Christmas, there may be a potential risk of delay.

The last date to order a bike that is available for Christmas delivery is 5pm on Tuesday 18th December. For all other items the last date to order items that are available for Christmas delivery is 12pm on Wednesday 19th December.

You can easily spot which items are guaranteed for Christmas delivery with the icon. Choose your size and colour to see if the item qualifies for Christmas delivery.

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 to mainland 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.

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