Giro Source MIPS Mountain Bike Helmet

  • Provides deep coverage
  • Integrated MIPS technology
  • Roc Loc 5 Fit System
WAS £129.99
SAVE 51%
Stock Status:
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The Giro Source MIPS® delivers performance and protection in a trail-ready design.  Deep coverage with aggressive styling, the Source MIPS is equipped with 16 vents and deep internal channelling, the comfort and security of the Roc Loc 5 fit system, a moto-style adjustable screw-in visor, and full lower hardbody protection for added durability.   

  • Integrated MIPS® Technology combines Giro’s Roc Loc 5 fit system with a customized MIPS low friction liner providing an added measure of protection from rotational forces on angled impacts
  • Adjustable moto style screw in visor and goggle compatibility
  • Extended coverage and full lower hardbody protection.
  • Roc Loc 5 Fit System offers on the fly fit tension and vertical adjustment for added comfort and stability
  • 16 vents and deep internal channelling

What is MIPS? All Giro Helmets are designed to reduce as much energy as possible while meeting and exceeding safety standards. The aim of Giro's MIPS helmets is to reduce rotational forces and Giro believes that helmets equipped with MIPS technology can reduce the amount of rotational force that may be transferred to the riders brain in certain impacts.

Size Chart:
Size Chart


MPNGIH7140521, GIH7140522, GIH7140523, GIH7140529, GIH7140530, GIH7140531, GIH7129440, GIH7129441, GIH7129458, GIH7129459, GIH7129438, GIH7129439, GIH7129460

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Our Payment Options

Maestro Mastercard Visa PayPal V12 Retail Finance

Online we currently accept payment from the methods listed above including a wide range of finance options. In store we also accept payment in the form of cash and gift vouchers.

Finance Options

In order to get the kit you want, when you need it, without ruining the family finances we offer a highly flexible range of finance options to help you get the best products on your bike now rather than at the end of the season when you've saved up the cash to make the purchase. There are even interest free options which effectively spread the cost without costing you any extra.

D.T.(Automotives) Limited T/A Tweeks Cycles is authorised and regulated by the Financial Conduct Authority and is the broker and not the lender. Our FCA registration number is 689896. D.T.(Automotives) Limited offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance and Klarna. Credit is provided subject to affordability, age and status. Minimum spend applies. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority.

Delivery & Returns

UK Mainland Delivery Prices

Delivery Type Cost Estimated Delivery Time
Standard Delivery for orders under £49.99 from £1.33 2-3 working days from day of despatch(Excludes weekends and Bank Holidays)
Standard Delivery for orders over £49.99 Free
Express Delivery from £1.68 1-2 working days from day of despatch(Excludes weekends and Bank Holidays)
Special Delivery from £12.54 For any next working day delivery order before 4pm Monday to Thursday.
For any weekend delivery order before 4pm Friday
Click & Collect from £7.62 Collect your parcel from a local post office. 2-3 working days from day of despatch(Excludes weekends and Bank Holidays)

For international shipping please visit our delivery page.

For information about returning an item please visit our returns page.