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 Dakota Ridge Motorsport Supply

Dakota Ridge Motorsport Supply

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 At Dakota Ridge Motorsport Supply, we have been providing riding enthusiasts with quality products and top-end customer service since 2008. Have questions? Just let us know. We're here to help and are happy to answer any questions in order to help you find just what you are looking for.
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General Interest

 

Please refer to the size chart below to determine the correct size helmet for you.  If you are unsure of your head measurement, have a friend use a measuring tape to measure your head just above your ears and eyebrows.  Measure several times, you are trying to find the longest distance around your head.  
 

Once you receive your helmet, perform the following tests with the chin strap properly and securely in place to ensure that the helmet fits properly.

  1. With the helmet in place in chin strap secured, shake your head side to side, if the helmet moves independently of your head than the helmet is too big.  When performing this test, the helmet liner and cheek pads should be in direct contact with your skin.  While shaking, your skin should move with the helmet.
  2. Place one hand directly behind your head and push forward.  Use your other hand and try to slip your little finger between your forehead and the helmet EPS liner.  If you're able to slip your finger in, the helmet is too big.
  3. To test for helmet lift, place one hand on the chin bar and push up (while the chin strap is secured), is the helmet comes off your head it is too big.  Next, place one hand on the back and push up again, if your helmet lifts off your head the helmet is too big.

 

Your helmet is the most important piece of safety equipment you'll buy, so if you have any questions about how to properly measure for and fit a helmet, just let us know.  Most brands and models will use the first size chart below.  Brands that do not use this chart are listed afterwards.

 

Answer, Arai, Castle X, Cyber, EVS, Fly Racing, HJC (except CL-17, FG-17, FG-JET & RHPA models (see charts below for these models)), Joe Rocket, Just 1, Kabuto, MSR, Nolan, Scorpion, Shoei, Speed & Strength, Zoan & Zox Helmets

Size

Head Circumference
Inches

Head Circumference
Metric

Hat
Size

XS

20-7/8 - 21-1/4"

53 - 54cm

6-5/8 - 6-3/4

S

21-5/8 - 22"

55 - 56cm

6-7/8 - 7

M

22 7/16 - 22 13/16"

57 - 58cm

7-1/8 - 7-1/4

L

23 1/8 - 23 5/8"

59 - 60cm

7-3/8 - 7-1/2

XL

24 - 24 3/8"

61 - 62cm

7-5/8 - 7-3/4

2XL

24 13/16 - 25 3/16"

63 - 64cm

7-7/8 - 8

3XL

25 9/16 - 26"

65 - 66cm

8-1/8 - 8-1/4

4XL

26 3/8 - 26 3/4"

67 - 68cm

8-3/8 - 8-1/2

5XL

27 1/8 - 27 1/2"

69 - 70cm

8-5/8 - 8-3/4



Bell Helmets (except Drifter DLX & Pit Boss Models)
Size XXS XS S M L XL XXL
Head Size (IN) 20 - 20 1/2" 21 1/4 - 21 5/8" 21 5/8" - 22" 22 1/2 - 22 3/4" 22 3/4 - 23 1/4" 23 5/8 - 24" 24 1/2 - 24 3/4"
Head Size (CM) 51 - 52cm 54 - 55cm 55 - 56cm 57 - 58cm 58 - 59cm 60 - 61cm 62 - 63cm
Hat Size 6 3/8 - 6 1/2" 6 3/4 - 6 7/8" 6 7/8 - 7" 7 1/8 - 7 1/4" 7 1/4 - 7 3/8" 7 1/2 - 7 5/8" 7 3/4 - 7 7/8"


Bell  Drifter DLX & Pit Boss Series Helmets
Size XS/S M L XL/XXL
Head Size (IN) 20 3/4 - 22" 22 - 22 3/4" 22 3/4 - 23 5/8" 24 - 24 3/4"
Head Size (CM) 53 - 56cm 56 - 58cm 58 - 60cm 61 - 63cm
Hat Size 6 5/8 - 7" 7 - 7 1/8" 7 1/4 - 7 1/2" 7 5/8 - 7 7/8"



GMAX Helmets

Size

Head Circumference
Inches

Head Circumference
Metric

Hat
Size

XS

21-1/4 - 21-5/8"

53 - 54cm

6-3/4 - 6-7/8

S

22 - 22-7/16"

55 - 56cm

7 - 7-1/8

M

22-13/16 - 23-1/4"

57 - 58cm

7-1/4 - 7-3/8

L

23-5/8 - 24"

59 - 60cm

7-1/2 - 7-5/8

XL

24-3/8 - 24-13/16"

61 - 62cm

7-3/4 - 7-7/8

2XL

25-3/16 - 25-5/8"

63 - 64cm

8 - 8-1/8

3XL

26 - 26-3/8"

65 - 66cm

8-1/4 - 8-3/8

4XL

26-1/2 - 26-5/8"

65 - 66cm

 



HJC CL-17 & CL-17 Plus Helmets

Size

Head Circumference
Inches

Head Circumference
Metric

Hat
Size

XS

21-1/4 - 21-5/8"

54 - 55cm

6-3/4 - 6-7/8

S

22 - 22-1/2"

56 - 57cm

7 - 7-1/8

M

22-7/8 - 23-1/4"

58 - 59cm

7-1/4 - 7-3/8

L

23-5/8 - 24"

60 - 61cm

7-1/2 - 7-5/8

XL

24-3/8 - 24-3/4"

62 - 63cm

7-3/4 - 7-7/8

2XL

25-1/4 - 25-5/8"

64 - 65cm

8 - 8-1/8

3XL

25-5/8 - 26"

65 - 66cm

8-1/8 - 8-1/4

4XL

26-3/8 - 26-3/4"

67 - 68cm

8-3/8 - 8-1/2

5XL

27-1/4 - 27-5/8"

69 - 70cm

8-3/4 - 8-3/4



HJC FG-17, FG-JET & RPHA Series Helmets

Size

Head Circumference
Inches

Head Circumference
Metric

Hat
Size

XS

21-1/4 - 21-5/8"

54 - 55cm

6-3/4 - 6-7/8

S

21-5/8 - 22"

55 - 56cm

6-7/8 - 7

M

22-1/2 - 22-7/8"

57 - 58cm

7-1/8 - 7-1/4

L

22-7/8 - 23-1/4"

58 - 59cm

7-1/4 - 7-3/8

XL

23-5/8 - 24"

60 - 61cm

7-1/2 - 7-5/8

2XL

24-3/8 - 24-3/4"

62 - 63cm

7-3/4 - 7-7/8

3XL

25-1/4 - 25-5/8"

64 - 65cm

8 - 8-1/4

3XL

25-1/4 - 25-5/8"

64 - 65cm

8 - 8-1/4





Youth Helmets


Answer, EVS, Fly Racing, MSR Youth Helmets

Size

Head Circumference
Inches

Head Circumference
Metric

Hat
Size

YS

18-1/4 - 19"

47 - 48cm

5-7/8 - 6

YM

19 - 19-3/4"

49 - 50cm

6-1/8 - 6-1/4

YL

19-3/4 - 20-1/2"

51 - 52cm

6-3/8 - 6-1/2



Gmax, Just 1, Scorpion Youth Helmets

Size

Head Circumference
Inches

Head Circumference
Metric

Hat
Size

YS

18-7/8 - 19-1/4"

47 - 48cm

6 - 6-1/8

YM

19-3/4 - 20-1/8"

49 - 50cm

6-1/4 - 6-3/8

YL

20-1/2 - 20-7/8"

51 - 52cm

6-1/2 - 6-5/8



Castle X, HJC, Speed & Strength, Zoan Youth Helmets

Size

Head Circumference
Inches

Head Circumference
Metric

Hat
Size

YS

19-1/4 - 19-3/4"

49 - 50cm

6-1/8 -6-1/4

YM

20 - 20-1/2"

51 - 52cm

6-3/8 - 6-1/2

YL

20-7/8 - 21-1/4"

53 - 54cm

6-5/8 - 6-3/4