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Giro Source MIPS MTB Helmet | Lightweight, Trail-Ready Bike Helmet
Giro Source MIPS MTB Helmet | Lightweight, Trail-Ready Bike Helmet
Giro

Giro Source Mountain Bike Helmet with MIPS - Black/Multi

£134.99
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

Giro Source Mountain Bike Helmet with MIPS - Black/Multi

Season:SP25

Brand:Giro

Code:35934-A20

Ride confidently with the Giro Source MIPS helmet. Featuring deep coverage, 17 vents, Roc Loc® 5 fit system, and MIPS for rotational impact protection.

Conquer technical trails with confidence in the Giro Source MIPS Mountain Bike Helmet, engineered for all-mountain performance, extended protection, and superior ventilation. Designed for aggressive riders, the Source combines deep coverage and 17 Wind Tunnel™ vents to keep you cool on intense climbs and descents.

Built with MIPS (Multi-directional Impact Protection System), this helmet reduces rotational forces during certain impacts, offering enhanced brain protection. Paired with the Roc Loc® 5 MIPS fit system, the Source delivers a secure, custom fit with easy one-handed adjustment.

  • MIPS Brain Protection: Integrated MIPS helps reduce rotational impact forces to protect your brain in angled crashes.
  • Extended Trail Coverage: Deep coverage at the back and sides enhances safety for enduro and trail riding.
  • Roc Loc® 5 MIPS Fit System: Fine-tune the fit, tension, and tilt with one hand for a secure, customised feel.
  • 17 Wind Tunnel Vents with Internal Channeling: Ensures maximum airflow to keep you cool and dry on hot, technical rides.
  • In-Mould Polycarbonate Shell with Hardbody™ Wrap: Lightweight construction fused to an EPS liner for superior strength and durability.
  • Adjustable Moto-Style Screw-In Visor: Easily change visor positions on the fly, including a high-up setting for goggle storage.
  • Tool-Free, Bolt-On Visor: Make quick visor adjustments without tools, perfect for adapting to changing light or conditions.
  • IONIC+® Anti-Microbial Padding: Odour-fighting silver-infused padding keeps your helmet fresher, longer.

Designed for Serious Trail Riders

Whether you're tackling steep descents, tight switchbacks, or long uphill slogs, the Giro Source MIPS MTB helmet delivers the ventilation, fit, and safety you need. Ideal for enduro, trail, and e-MTB riders looking for high-end protection in a sleek, rugged design.

Technical Information
Certification:
  • CE EN 1078
Weight:
  • 340g (size M)
Material Composition:
  • 45% EPS, 22% PC, 25% Nylon, 2% Polyester, 2% POM, 3% PU, 1% Silicone
Sizing Information

These size charts and conversions are meant to serve as a guide. Giro recommend you try-on before riding to ensure full comfort and performance.

Bike Helmet Size Guide

How to measure your size – Wrap a measuring tape around your head, keeping the tape level from front to back. Note the measurement and reference the Size Guide. Note: Make sure the helmet fits with a little room when the fit system is loose, and sits low enough to protect your forehead without hindering your vision. Once you’ve got the right size, you can adjust the fit.

For helmets equipped with MIPS technology, please review the following warning: SOME MIPS® LOW-FRICTION LAYERS, ALONG WITH OTHER PARTS OF A HELMET, MIGHT CAUSE LACERATIONS TO THE WEARER’S HEAD/FACE IN SOME ACCIDENTS. THIS MIGHT OCCUR DUE TO THE HIGH PRESSURE ON THE SCALP FROM THE IMPACT OR AS A BY-PRODUCT OF THE LOW-FRICTION LAYER’S MOVEMENT IN CERTAIN ANGLED IMPACTS TO HELP REDUCE THE ROTATIONAL ENERGIES TO THE HEAD. IF YOU WOULD LIKE FURTHER INFORMATION, PLEASE CONTACT US.

Adult SizeCircumference
S52 - 55.5cm
M55.5 - 59cm
L59 - 62.5cm
XL62.5 - 65cm
Professional Opinion
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