Diamondback Summit
Tested in 2026
Adult
Mountain bike open-face
Score
45.1
out of 100
Star rating
2/5 Stars
Price
$
$
$
$
under $80
Performance
Specifications
Performance
Each metric is weighted differently based on crash severity. Scores combine to create the overall 100-point rating.
Helmet coverage
5.2
/ 6
Retention system strength
1.9
/ 6
Head protection in low-speed impact
6.0
/ 12
Angular head impact protection
11.0
/ 32
Head protection from concentrated impact
7.9
/ 8
Head protection in higher-speed impact
0.9
/ 12
Head protection variability in higher-speed impact
1.0
/ 2
Head protection variability in low-speed impact
1.0
/ 2
Helmet stability in a crash
4.5
/ 6
Head protection in standard-speed impact
5.4
/ 12
Head protection variability in standard-speed impact
0.5
/ 2
Total
45.1
/ 100
Specifications
Model
Summit
Brand
Diamondback
Size
M/L
Helmet Type
Mountain bike open-face
Weight (Average from 3 sizes)
285g
Shell/Liner material
PVC or Polycarbonate
AIMS
NO
Retention System
Quick Release
Price Range
$ (under $80)
Certification standard(s)
AS/NZS2063:2008
