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Copyright © 2011
Sierra Electronics
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ARAI
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Helmet Size |
Head (inches) |
Head (cm) |
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X-SMALL |
20 7/8 – 21 ¼ |
53-54 |
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SMALL |
21 5/8 – 22 |
55-56 |
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MEDIUM |
22 ½ - 22 7/8 |
57-58 |
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LARGE |
23 ¼ - 23 5/8 |
59-60 |
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X-LARGE |
24 - 24 3/8 |
61-62 |
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XX-LARGE |
24 ¾ - 25 1/8 |
63-64 |
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XXX-LARGE |
25 ½ - 26 |
65-66 |
GMAX
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Helmet Size |
Head (inches) |
Head (cm) |
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X-SMALL |
21 ¼ - 21 5/8 |
54-55 |
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SMALL |
22 – 22 7/16 |
56-57 |
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MEDIUM |
22 13/16 – 23 ¼ |
58-59 |
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LARGE |
23 5/8 – 24 |
60-61 |
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X-LARGE |
24 3/8 – 24 13/16 |
62-63 |
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XX-LARGE |
25 3/16 – 25 5/8 |
64-65 |
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XXX-LARGE |
26 – 26 3/8 |
66-67 |
HJC
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Helmet Size |
Head (inches) |
Head (cm) |
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XX-SMALL |
20 - 20 1/2 |
51-52 |
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X-SMALL |
20 7/8 – 21 ¼ |
53-54 |
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SMALL |
21 5/8 – 22 |
55-56 |
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MEDIUM |
22 ½ - 22 7/8 |
57-58 |
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LARGE |
23 ¼ - 23 5/8 |
59-60 |
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X-LARGE |
24 - 24 3/8 |
61-62 |
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XX-LARGE |
24 ¾ - 25 ¼ |
63-64 |
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XXX-LARGE |
25 5/8 - 26 |
65-66 |
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XXXX-LARGE |
26 3/8 – 26 3/4 |
67-68 |
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XXXXX-LARGE |
27 ¼ - 27 5/8 |
69-70 |
NOLAN
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Helmet Size |
Head (inches) |
Head (cm) |
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X-SMALL |
20 7/8 – 21 ¼ |
53-54 |
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SMALL |
21 5/8 – 22 |
55-56 |
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MEDIUM |
22 ½ - 22 7/8 |
57-58 |
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LARGE |
23 ¼ - 23 5/8 |
59-60 |
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X-LARGE |
24 - 24 ½ |
61-62 |
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XX-LARGE |
24 7/8 – 25 ¼ |
63-64 |
SCORPION EXO
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Helmet Size |
Head (inches) |
Head (cm) |
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X-SMALL |
21 ¼ - 21 5/8 |
54-55 |
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SMALL |
22 – 22 3/8 |
56-57 |
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MEDIUM |
22 3/4 – 23 1/2 |
58-59 |
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LARGE |
23 1/2 – 24 |
60-61 |
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X-LARGE |
24 – 24 3/8 |
62-63 |
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XX-LARGE |
24 3/4 – 25 1/8 |
63-64 |
SHARK
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Helmet Size |
Head (inches) |
Head (cm) |
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X-SMALL |
20 7/8 – 21 ¼ |
53-54 |
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SMALL |
21 5/8 – 22 |
55-56 |
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MEDIUM |
22 3/8 – 22 ¾ |
57-58 |
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LARGE |
23 ¼ - 23 5/8 |
59-60 |
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X-LARGE |
24 - 24 3/8 |
61-62 |
SHOEI
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Helmet Size |
Head (inches) |
Head (cm) |
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XX-SMALL |
20 1/8 – 20 ½ |
51-52 |
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X-SMALL |
20 7/8 – 21 ¼ |
53-54 |
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SMALL |
21 5/8 – 22 |
55-56 |
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MEDIUM |
22 ½ - 22 7/8 |
57-58 |
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LARGE |
23 ¼ - 23 5/8 |
59-60 |
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X-LARGE |
24 – 24 3/8 |
61-62 |
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XX-LARGE |
24 ¾ - 25 1/8 |
63-64 |
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XXX-LARGE |
25 5/8 – 26 |
65-66 |
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Free Ground Shipping in
Continental US for orders
over $199
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Contact Us |
| 800-338-6938 |
| 937-335-8939
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sales@sierra-mc.com |
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Store Hours |
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M-Fri 9 to 5:30 |
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Saturday by appointment only
Closed Sunday
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Sierra will price match any
advertised price on any in stock item. Restrictions may apply. Please call
for details.
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