A super-light modern trail helmet - that's the Radix. The shape of the helmet is literally chewed to the bone - no design frills and frills on the viewer. Simplicity is power! The comfort and level of protection will give you confidence even on day-long expeditions into technical terrain. A perfect fit on the head is ensured by the Roc Loc 5.5 clamping system, which you can adjust to your exact needs. In the case of the variant with MIPS technology, it is also integrated with the MIPS insert. MIPS technology available in selected colours. MIPS (Multi-Directional Impact Protection System) provides increased protection against rotational forces on the head.
A super-light modern trail helmet - that's the Radix. The shape of the helmet is literally chewed to the bone - no design frills and frills on the viewer. Simplicity is power! The comfort and level of protection will give you confidence even on day-long expeditions into technical terrain. A perfect fit on the head is ensured by the Roc Loc 5.5 clamping system, which you can adjust to your exact needs. In the case of the variant with MIPS technology, it is also integrated with the MIPS insert. MIPS technology available in selected colours. MIPS (Multi-Directional Impact Protection System) provides increased protection against rotational forces on the head.
A super-light modern trail helmet - that's the Radix. The shape of the helmet is literally chewed to the bone - no design frills and frills on the viewer. Simplicity is power! The comfort and level of protection will give you confidence even on day-long expeditions into technical terrain. A perfect fit on the head is ensured by the Roc Loc 5.5 clamping system, which you can adjust to your exact needs. In the case of the variant with MIPS technology, it is also integrated with the MIPS insert. MIPS technology available in selected colours. MIPS (Multi-Directional Impact Protection System) provides increased protection against rotational forces on the head.
A super-light modern trail helmet - that's the Radix. The shape of the helmet is literally chewed to the bone - no design frills and frills on the viewer. Simplicity is power! The comfort and level of protection will give you confidence even on day-long expeditions into technical terrain. A perfect fit on the head is ensured by the Roc Loc 5.5 clamping system, which you can adjust to your exact needs. In the case of the variant with MIPS technology, it is also integrated with the MIPS insert. MIPS technology available in selected colours. MIPS (Multi-Directional Impact Protection System) provides increased protection against rotational forces on the head.
Last updated at 03/21/2026 14:52:53
Giro Radix Mtb Helmet White S
Delivery $24.99
originally posted on tredz.co.uk
After a bit of expected tweaking I got a nice secure fit. I did need to trim some of the excess chin strap but being nylon you can cut with scissors and then melt with a lighter to reseal the ends. On my first ride out on a gravel trail wearing this helmet i did have a nasty spill and the helmet took the brunt of the impact. The helmet worked well with only minor sticker damage and a few dents in the outer shell. I would recommend it.
originally posted on bikeinn.com
Nice helmet, perfect for its price. Fits to my non-standard big head. Fast delivery
originally posted on sigmasports.com
I've a 56.5cm head and the medium is perfect. When on it doesn't move at all whilst riding and doesn't interfere with my Oakley sunglasses. Went for the non-MIPS version as I suspected it would be cooler in hot conditions.
| FIT SYSTEM | Roc Loc 5.5 |
| VENTILATION | 25 holes Wind Tunnel with internal ducting |
Giro Radix Mtb Helmet White S
Delivery $24.99
After a bit of expected tweaking I got a nice secure fit. I did need to trim some of the excess chin strap but being nylon you can cut with scissors and then melt with a lighter to reseal the ends. On my first ride out on a gravel trail wearing this helmet i did have a nasty spill and the helmet took the brunt of the impact. The helmet worked well with only minor sticker damage and a few dents in the outer shell. I would recommend it.
Nice helmet, perfect for its price. Fits to my non-standard big head. Fast delivery
I've a 56.5cm head and the medium is perfect. When on it doesn't move at all whilst riding and doesn't interfere with my Oakley sunglasses. Went for the non-MIPS version as I suspected it would be cooler in hot conditions.
It fits well and that’s more than l can say about more expensive helmets. Its not loaded with features, but build quality is good. When you consider the price of some helmets this is good for the price.
Really pleased with this helmet, have worn for riding on and off roadIt’s comfortable, lightweight, fits well and is well ventilated.My head measured 58.5cm and I went for the M which still has room for adjustment.The visor is fine but doesn’t ratchet into different positions if that’s important to you.
Bought this for my son who is getting more into mtb riding but rides like your typical no-fear teenager.He says this the best helmet he’s had. Very comfortable and super light. Previous comparisons are in the £50-£60 range.
I use this for gravel riding. It's nice and lightweight and I can get a good fit using the dial at the back. I think it's really good value for money (especially in the sale) and I like that it includes MIPS, and nice that it comes in a variety of colours.
Great helmet. Good fit for me. Feels very protective. Use for my commute and occasional MTB.
Nice comfortable fit and very smart. My head measures 56cm & the medium fits perfect. Also very light 271gm. Recommended.
I bought this about a month ago and been using it on my every MTB ride. All my friends ask me how much I paid for it :-). The design is sleek and is very comfortable as it comes in different sizes. If you want budget MIPS helmet, don't hesitate, just order the right size, you wont regret!
| FIT SYSTEM | Roc Loc 5.5 |
| VENTILATION | 25 holes Wind Tunnel with internal ducting |
