Giro Radix MIPS Trail MTB Bike Helmet - Harbor Blue Brand_Reid 8mm interface

8mm interface

Designed for performance and engineered for simplicity - the ELEMNT BOLT GPS Bike Computer makes every second count

and Mips technology

5 OUTER WIDTH (mm): 35 PROFILE HEIGHT (mm): 19 ETRTO: 584x30

The original service manual from the 70's can be viewed below

Giro Radix MIPS Trail MTB Bike Helmet - Harbor Blue Brand_Reid 8mm interfaceRADIX MIPS HELMET THE RADIX MIPS HELMET COMBINES RUGGED STYLE AND DURABILITY TO MEET THE DEMANDS OF CORE TRAIL RIDERS, WITH THE COVERAGE, LIGHT WEIGHT, AND VENTILATION RIDERS NEED TO RIDE COMFORTABLY AND CONFIDENTLY ALL DAY.. DETAILS THE RADIX MIPS HELMET IS FOR THE RUGGED ADVENTURER WHO APPRECIATES A PERFECT FIT, THE SUN STAYING OUT OF THEIR EYES, AND PLENTY OF VENTILATION. The highly adjustable Roc Loc 5. 5 Mips system allows you to customize fit