Discover FOX Proframe mountain bike helmets at BIKE24
FOX Proframe pairs a fixed chin bar with an open front, so you get full-face protection without feeling boxed in on the climb. Pedal up a gravel climb with plenty of airflow through the large vents, then head downhill with the protection of a downhill helmet around your jaw. That makes the range a strong choice for enduro race days and after-work rides with jumps.
What started as one helmet has grown into a two-tier range. The Proframe is the ventilated base helmet with MIPS and an adjustable visor. The Proframe RS steps things up with MIPS Integra Split integrated into the shell and a BOA closure for fine-tuning the fit. There’s also a dedicated kids’ size. At BIKE24, you’ll find both helmets in multiple colorways, plus more downhill helmets from FOX Racing.
Why choose a FOX Proframe helmet?
The benefits become clear on the first long climb. Here’s what stands out when we ride:
- Downhill certified: Proframe and Proframe RS both meet the ASTM F1952 downhill standard.
- Airflow on climbs: Large vents and reduced contact area help keep your head cool while climbing.
- Adjustable fit: Two sets of cheek pads are included, while the RS adds BOA adjustment.
FOX Proframe MTB helmets at a glance
Choose based on how you ride and your budget. The Proframe covers trail rides with occasional bike park descents. The RS adds more fit adjustment plus the BOA Fit System, MIPS Integra Split and a FIDLOCK magnetic buckle. Kids get a dedicated size.
FOX Proframe – the ventilated base helmet with MIPS
The Proframe is the entry-level helmet, but it’s still downhill certified. MIPS reduces rotational forces in a crash, while the visor adjusts to three positions with room for goggles. It also meets the NTA-8776 e-bike standard, making it suitable for fast e-MTB descents.
FOX Proframe RS – the race-spec helmet
The RS integrates MIPS Integra Split directly into the shell rather than using a separate liner. The BOA dial at the back is easy to adjust with gloves on, while the Fidlock magnetic chin strap buckle opens just as quickly. The liner and cheek pads feature antimicrobial Ionic+ treatment.
FOX Proframe Kids – full-face protection for smaller heads
The kids’ helmet uses the same chin bar and MIPS system as the adult helmet, in a single size for head circumferences from 48 to 52 cm. It fits smaller heads that still have too much room in a size S. A solid choice for first bike park days and trails where an open-face helmet doesn’t offer enough protection.
FOX racing Proframe technologies
The range combines two key ideas: downhill-level protection and trail helmet airflow. A fixed chin bar provides coverage, while the MIPS systems manage rotational forces. Fit systems keep the helmet secure around your head without creating pressure points.
MIPS and MIPS Integra Split in FOX Proframe helmets
MIPS places a low-friction layer between your head and the shell. During an angled impact, it allows relative movement designed to reduce rotational motion transferred to the head. The RS combines EPP and EPS with a low-friction MIPS Integra Split layer. The two energy-absorbing foam layers allow 10 to 15 mm of relative movement and create a dual-density construction for impacts at different speeds.
BOA Fit System and Fidlock on the FOX Proframe RS
The BOA dial at the back tightens the fit system around your head. Turn the dial until the helmet sits securely, then make adjustments while riding without taking it off. The rear cradle also adjusts vertically through four positions. A FIDLOCK magnetic buckle secures the chin strap.
Visor and ventilation on FOX Proframe helmets
The open area between the chin bar and shell channels air toward your face, while the reduced contact area inside lets it circulate. On the RS, channels in the shell direct airflow toward the rear. The visor adjusts to three positions: lower for sun protection or raised to make room for goggles. A removable GoPro mount sits underneath.
Shop FOX Proframe helmets at BIKE24
From the ventilated Proframe to the BOA-equipped RS, both helmets give you chin protection on descents and plenty of airflow on climbs. Check available sizes and colors at a glance and get your helmet delivered fast. Not sure about your head circumference? Our team rides too and can help you choose a size if you’re between sizes. You’ll also find matching MTB goggles at BIKE24.
Frequently asked questions about FOX Proframe helmets
What size FOX Proframe helmet do I need?
Measure your head circumference one finger width above your ears. Proframe and Proframe RS come in S for 51 to 55 cm, M for 55 to 59 cm and L for 59 to 63 cm. If you’re between sizes, the thicker set of cheek pads helps you fine-tune the fit.
Is the FOX Proframe approved for bike park and downhill riding?
Yes. Proframe and Proframe RS meet ASTM F1952, a certification for downhill mountain bike helmets. Individual bike parks set their own helmet requirements. The Proframe also meets NTA-8776 for fast e-bikes.
Can I change the cheek pads in a FOX Proframe helmet?
Each helmet comes with two sets of pads: a thinner set installed in the helmet and a thicker replacement set. If the helmet feels too loose around your cheeks, switch to the 30/40 mm pads. On the RS, the pads and liner feature antimicrobial treatment.
Is there a FOX Proframe helmet for kids?
Yes. The kids’ helmet comes in one size for head circumferences from 48 to 52 cm, with the same chin bar and MIPS system as the adult helmet. The visor and GoPro mount are identical, and it also meets ASTM F1952. Find more kids’ helmets at BIKE24.