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Helmet Parts Finder

Gmax Size Chart

GMAX Helmet Size Charts

To find your approximate helmet size, use a soft sewing tape measure. Start at your forehead about one inch above your eyebrows and measure around the largest portion of the back of your head. If you do not have a soft measuring tape, use a string or phone charging cord, then lay it flat and measure it with a ruler.

GMAX Full Face Helmet Size Chart
Size Head Size (CM) Head Size (IN)
YS 49–50 cm Approx. 19–20 in
YM 51–52 cm Approx. 20–21 in
YL / XS 53–54 cm Approx. 21 in
S 55–56 cm Approx. 21–22 in
M 57–58 cm Approx. 22 in
L 59–60 cm Approx. 23 in
XL 61–62 cm Approx. 24 in
2XL 63–64 cm Approx. 24–25 in
3XL 65–66 cm Approx. 25 in
GMAX Modular Helmet Size Chart
Size Head Size (CM) Head Size (IN)
YS 49–50 cm Approx. 19–20 in
YM 51–52 cm Approx. 20–21 in
YL / XS 53–54 cm Approx. 21 in
S 55–56 cm Approx. 21–22 in
M 57–58 cm Approx. 22 in
L 59–60 cm Approx. 23 in
XL 61–62 cm Approx. 24 in
2XL 63–64 cm Approx. 24–25 in
3XL 65–66 cm Approx. 25 in
GMAX Off-Road Helmet Size Chart
Size Head Size (CM) Head Size (IN)
YS 49–50 cm Approx. 19–20 in
YM 51–52 cm Approx. 20–21 in
YL / XS 53–54 cm Approx. 21 in
S 55–56 cm Approx. 21–22 in
M 57–58 cm Approx. 22 in
L 59–60 cm Approx. 23 in
XL 61–62 cm Approx. 24 in
2XL 63–64 cm Approx. 24–25 in
3XL 65–66 cm Approx. 25 in
GMAX Half Helmet Size Chart
Size Head Size (CM) Head Size (IN)
YS 49–50 cm Approx. 19–20 in
YM 51–52 cm Approx. 20–21 in
YL / XS 53–54 cm Approx. 21 in
S 55–56 cm Approx. 21–22 in
M 57–58 cm Approx. 22 in
L 59–60 cm Approx. 23 in
XL 61–62 cm Approx. 24 in
2XL 63–64 cm Approx. 24–25 in
3XL 65–66 cm Approx. 25 in
GMAX Youth Helmet Size Chart
Size Head Size (CM) Head Size (IN)
YS 49–50 cm Approx. 19–20 in
YM 51–52 cm Approx. 20–21 in
YL / XS 53–54 cm Approx. 21 in
S 55–56 cm Approx. 21–22 in
M 57–58 cm Approx. 22 in
L 59–60 cm Approx. 23 in
XL 61–62 cm Approx. 24 in
2XL 63–64 cm Approx. 24–25 in
3XL 65–66 cm Approx. 25 in

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