Review on Giro Radix MIPS Mountain Bike Helmet for Men by Jaime Miranda

I measured the correct size according to the instructions and after repeated use of the rope and tape measure I got 59 or maybe a quarter inch less. My old Giro, maybe ten years old and dropped on hard ground a few times, is medium but narrow and hard or impossible for a light cap so I went for a big one. Despite many adjustments and a week of riding and adjusting, I couldn't get the front end to sit high enough above my brows and was close to my brows even with the ratchet as tight as possible in the back. I opted for the Sweat Buster and the extra thickness was enough for a comfortable fit. My advice for in-between sizes: make sure you can return or try on a size. Otherwise I'm satisfied. This is a heavier helmet and runs hot, but it offers really good protection and feels safe.