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Alliance Crysmatic Helmet

SKU
18310

Product information

- Fiberglass/Dyneema/Carbon Fiber shell
- Prolock secure shield locking system
- Wind tunnel tested and refined
- Quick-change fog free proshield with sideplates
- Molded twin channel supervent for increased cooling
- Chin venting system reduces shield fogging
- Meets or exceeds the following: dot FMVSS 218 (US), ECE 22-05 (Europe),
SAI AS1698 (Australia) & SG (Japan) safety and testing standards

Take measurement of the circumference (outline) of the head at the widest point - about 2.5 cm (1 inch) above the eyebrows and ears. For brand CKX helmets and Gmax add 1cm to your measurement.


Helmets for adults

Size Hat size Circumference (inch) Circumference (cm)
XX-Small 6⅜ - 6½ 20⅛ - 20½ 51-52
X-Small 6⅝ - 6¾ 20⅞ - 21¼ 53-54
Small 6⅞ - 7 21⅝ - 22 55-56
Medium 7⅛ - 7¼ 22½ - 22⅞ 57-58
Large 7⅜ - 7½ 23¼ - 23⅝ 59-60
X-Large 7⅝ - 7¾ 24 - 24⅜ 61-62
XX-Large 7⅞ - 8 24¾ - 25½ 63-64
3X-Large 8⅛ - 8¼ 25⅝ - 26 65-66
4X-Large 8⅜ - 8½ 26⅜ - 26¾ 67-68
5X-Large 8⅝ - 8¾ 27⅛ - 27½ 69-70

Helmets for kids

Size Circumference (inch) Circumference (cm)
Small 19.15-19.50 49-50
Medium 20.10-20.45 51-52
Large 20.87-21.26 53-54

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