Giro Radix MIPS Men's Mountain Cycling Helmet

The fit on this helmet is great. I realize that's a very personal thing and just because it fits me doesn't mean it will fit you.I've had several Giro helmets over the years. (Including the first one with a Roc Loc system in the early 90s!) The last time I bought a bike helmet I got a good deal on a Bell and it was fine. But helmets age out after a few years and need be replaced, so here we are. Also, I recently replaced my motorcycle helmet with a Bell MIPS and I wanted to upgrade to a MIPS helmet for the bike, too.I had forgotten how well Giro helmets fit me and I'm loving how comfortable this one is.If I had to come up with any negatives, I only have a couple minor nit picks. The visor is a little shorter than I like, another half inch (12ish mm) would have been good. Also, I did like the no pinch buckle on the Bell. I'm in my 50s now and the skin under my chin is a little looser than it used to be. The first time I tried this one on, I pinched myself because I was out of the habit of ensuring the buckle wasn't against my skin when I snapped it closed. Ouch.

I have been riding with a fox helmet for the last 7 years, and I always bike through the winter without one because it is not large enough to fit over a beanie, and no one will make a large enough helmet, and I don't want to sweat inside a ski helmet, even though they really look cool. After looking for smith everywhere and never being able to find the XL version, I finally found this, and ordered the largest size. It fits great at about 23.5" with nothing but a bandanna, and the mips is a huge huge improvement in comfort, and was very easy to adjust. I did not think I would like the "y" connectors beneath the ears, but they actually work really well. Set the female buckle side first, pull the cord through to the other side, set the other side, and clip off the excess webbing, and singe the end with a lighter; good to go. The visor flips up just enough to fit a headlamp for night riding, and the helmet tilts back and fits large snow goggles. The only complaint I had, was...why don't helmet manufacturers put headlamp and goggle guides on every single helmet? Haven't we figured that out yet? So I spent a day looking at all the terrible 3m glue things that I know will melt and mush off my helmet and make it look like crap, and then I finally settled on using black midgrade size zipties, the 8" black ones. You can position them and route them under the mips so you don't feel them. If you are looking at the helmet from the rear, don't use the middle holes, but the holes to the left of the middle, and to the right of the middle. And that would be the holes on the upper and the lower, with the middle ones left open. So you put four ties, one in each corner, and position the part that zips down so the nub is sticking out. They make perfect little permanent non-glue goggle and headlamp catches, and it doesn't clutter up the helmet and make it look bad. I also added two on the front where the visor flips up, in the center hole, so you can shake your head like crazy as if you were riding over logs, and now your headlamp won't slide off the front of the helmet and slap you in the face. 6 zipties, and you are good to go. Awesome helmet, so comfortable and easy to adjust. Incorporate goggle straps and it is great!

I got this as a gift for my boyfriend, and it was perfect!! Great color, perfect fit, shipped fast. I knew I wanted this model, as it was rated high for safety, breathability, and being lightweight. Really happy with it.

As an avid mountain biker, I have had and tried many helmets over the years I was pretty amazed at the comfort of this helmet. The adjustment dial works well and the straps are very comfortable. Sometimes I forget I am wearing it and my wife will have to remind me when I come to bed, to takeoff my helmet. But then again, it is probably better to wear protection in the bedroom.

Very well designed. Love it

This helmet feels light, and adjusts easily, while giving you great protection for your head. I am very pleased with it. I added the Giro ROC Loc 5 LED Cycling Helmet Light Accessory to my helmet, which gives me great visibility. The light attached to the back of the helmet with ease and provides a brilliant red light, stationary, or blinking. I highly recommend the helmet and the light, you can't go wrong!

I love this brand and style. I returned it though bc it was too small and didn’t have a larger size in this color/design.

I measured for my correct size per instructions and came out 59 or maybe a quarter of an inch less after using both a string and tape measure multiple times. My old Giro which is maybe ten years old and dropped on hard surfaces several times is a medium, but is tight and hard or impossible to fit a light cap, so I went with a large. In spite of multiple way to adjust and a week of riding and adjusting I could not get the front to sit high enough off my brow and was close to my eyebrows, even with the back ratchet as tight as it would go. My remedy was to buy a Sweat Buster and the extra thickness was just enough for a comfortable fit. My advice for those in between sizes is to make sure you can return or try on for fit.Otherwise I'm pleased. It's a heavier helmet and rides hot, but in exchange has really good protection coverage and feels secure.

The helmet came as advertised. I have a large dome and the large fits perfectly with a full twist on the adjustable dial. Suprised by how little padding there was despite being comfortable enough to not really notice. Perfect helmet for trail/Enduro.

Live the helmet, fits my big head perfectly, great vents top of the line helmet. The Matte is easily scratched so be careful if you care about that.

I already have a lot of difficulty finding caps and hats, having 62cm of circonference. But I also live in quite a cold place, with snow 5 months a year, but I enjoy them riding my fatbike in the woods. So with a hood or a toque, I needed something REALLY large and was ready to pay a bit more for quality and comfort. My XL model fits perfectly but it's a bit bulky (it's a trail hat), so you won't look very aerodynamic wearing this on the road. But it's made to take quite tough hits, so if you fall on tree trunks or boulders, you feel you're well protected all around your head. Great buy!

I bought this helmet for its fit and wind holes. The fit is great on my big/long head and the holes do a great job of ventilation. I wish I’d was a solid colour maybe or that more colour options were available. That aside I love the fit.