Fox Mainframe
Tested in 2025
Adult
Mountain bike open-face
Score
83.1
out of 100
Star rating
5/5 Stars
Price
$
$
$
$
$81-$160
Performance
Specifications
Performance
Each metric is weighted differently based on crash severity. Scores combine to create the overall 100-point rating.
Helmet coverage
5.3
/ 6
Retention system strength
2.8
/ 6
Head protection in low-speed impact
12.0
/ 12
Angular head impact protection
32.0
/ 32
Head protection from concentrated impact
8.0
/ 8
Head protection in higher-speed impact
11.7
/ 12
Head protection variability in higher-speed impact
0.6
/ 2
Head protection variability in low-speed impact
1.0
/ 2
Helmet stability in a crash
0.7
/ 6
Head protection in standard-speed impact
8.8
/ 12
Head protection variability in standard-speed impact
0.0
/ 2
Total
83.1
/ 100
Specifications
Model
Mainframe
Brand
Fox
Size
S, M, L
Helmet Type
Mountain bike open-face
Weight (Average from 3 sizes)
369g
Shell/Liner material
Polycarbonate
AIMS
YES
AIMS Type
MIPS
Retention System
Quick Release
Price Range
$$ ($81-$160)
Certification standard(s)
AS/NZS 2063, EN-1078
