| Monday | 9.00am - 5.30pm |
| Tuesday | 9.00am - 5.30pm |
| Wednesday | 9.00am - 5.30pm |
| Thursday | 9.00am - 5.30pm |
| Friday | 9.00am - 5.30pm |
| Saturday | 9.00am - 5.30pm |
| Sunday | 10.00am - 4.00pm |
| Bank Holidays | 10.00am - 5.00pm |

2026 GIRO Isode Mips II Unisex Cycling Helmet in Matte Black
The Isode Mips II features a compact shape, light weight, and efficient ventilation combined with a beginning user-friendly fit system that provides 7cm of dial adjustability. With the added rotational energy management of Mips Evolve Core, the Isode II Mips is a best-in-class sport road helmet.
Key Features:
- All Giro helmets are designed to reduce as much energy as possible while meeting and exceeding stringent safety standards. The goal of Giro's Mips® Evolve Core‐equipped helmets is to reduce rotational forces while enhancing fit and comfort by combining the Mips slip plane with the helmet's adjustable fit system. Giro believes that helmets equipped with this technology can reduce the amount of rotational force that may be transferred to rider's brain in certain impacts.
- In‐Mold Construction fuses a tough polycarbonate outer shell with the helmet's impact‐absorbing foam liner. The fusion process allows for better ventilation systems, making in‐mold helmets lighter and cooler than traditional helmets.
- The Roc Loc Sport fit system offers easy one‐handed operation with a 7cm adjustment range. Its confident clicking feel and sound lets riders know that the helmet is adjusting to a comfortable fit. With comfort similar to Roc Loc 5 and ponytail compatibility, the new Roc Loc Sport fit system brings premium function to sport level helmets.
- Combined with the massive vents, internal channeling forces air to flow over the scalp, providing remarkable cooling power.
All UK Mainland Bike Deliveries Over £999 - Free Bike orders are sent via TNT/FedEx with estimated delivery within 1 working day after quoted dispatch time (For Scottish Highlands, Northern Ireland, Isle of Man and the Channel Islands deliveries please allow an additional 1-4 working days).Bike orders under £999 and eBikes will incur a £25 delivery fee.
Free Delivery On Orders Over £199.99 - When you spend more than £199.99 at 99 Bikes deliveries to a UK mainland address will be free (excludes bikes & large items).Certain regions and territories of the UK will incur additional charges, details of which can be found on our delivery page.
Click & Collect Orders -Please be aware Click & Collect orders may take some time to fulfil. We advise not to travel to your chosen store until you have been notified that your order is ready for collection.
At 99 Bikes our priority is to ensure that you are highly satisfied with your purchase. In the unlikely event that you aren't, we offer a 30 day online return policy* in which you can receive a full refund. Any item including bikes (with the exception of food) can be returned to us for any reason provided it is received by us in an unused and resalable condition in or with its original packaging which must be undamaged.
Find Out More About Returns >
| ADULT SUPER FIT SIZE | CIRCUMFERENCE |
| S | 51 - 55 cm |
| M | 55 - 59 cm |
| L | 59 - 63 cm |
| XL | 63 - 65 cm |
| ADULT SUPER FIT FULL FACE | CIRCUMFERENCE |
| S | 51 - 53 cm |
| M | 51 - 55 cm |
| L | 55 - 59 cm |
| XL | 59 - 63 cm |
| ADULT UNIVERSAL | CIRCUMFERENCE |
| Women Adult | 50 - 57 cm |
| Unisex | 54 - 61 cm |
| Extra Large | 58 - 65 cm |
| YOUTH SIZE | CIRCUMFERENCE |
| XS (Scamp Model) | 45 - 49 cm |
| S (Scamp Model) | 49 - 53 cm |
| XS (Dime Model) | 47 - 51 cm |
| S (Dime Model) | 51 - 55 cm |
| Universal Child | 47 - 54 cm |
| Universal Youth (Ages 5+) | 50 - 57 cm |




