Giro Radix MIPS Mountain Bike Helmet

Color: Matte Black
Matte Black
Size:
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Description
Features
Specs
Size Chart
Description

THE RADIX MIPS® HELMET IS FOR THE RUGGED ADVENTURER WHO APPRECIATES A PERFECT FIT, THE SUN STAYING OUT OF THEIR EYES, AND PLENTY OF VENTILATION.

The highly adjustable Roc Loc® 5.5 MIPS system allows you to customize fit and feel for enhanced stability and long-range comfort while providing an added measure of protection from rotational forces in the event of an angled impact.

The P.O.V. visor offers 15 degrees of adjustment, and the tough polycarbonate outer shell is fused permanently to the EPS foam liner using our In-Mold™ construction process, to enhance durability and ventilation without excess bulk.

Features
INTEGRATED MIPS®

All Giro helmets are designed to reduce as much energy as possible while meeting and exceeding stringent safety standards. The goal of Giro's Integrated MIPS®-equipped helmets is to reduce rotational forces while enhancing fit and comfort by combining the MIPS slip plane with the helmet's adjustable fit system. Giro believes that helmets equipped with this technology can reduce the amount of rotational force that may be transferred to rider's brain in certain impacts. Learn more about MIPS in the video above.

HARDSHELL WITH IN-MOLD HARDBODY™ LOWER WRAP

The two-piece shell combines a tough outer hard shell with a polycarbonate lower shell permanently fused to the liner for durability without excess weight.

P.O.V. VISOR

Our P.O.V. visor features an adjustment mechanism that lets you move the visor up and down in indexed steps. These steps include three riding positions plus a high position for goggle storage above your brow. The design allows you to easily adjust your visor with one hand while riding.

ROC LOC® 5 FIT SYSTEM

The industry benchmark in comfort, stability, adjustability and weight savings. In addition to enhancing the fit and comfort of helmets, Roc Loc® 5 allows you to easily custom tune the fit tension and the fore-aft tilt of the helmet in seconds using a single hand. And it's lighter than comparable systems too, making it the ultimate in skull-hugging luxury.

WIND TUNNEL VENTILATION

Giro helmets are developed utilizing our proprietary Wind Tunnel ventilation system. This elaborate design combines active vents in the helmet's shell with exhaust channels inside the helmet that thrust fresh, cool air over and around the rider's head while forcing heat and stale air out. It's the most effective cooling system available, and a difference you can feel every time you ride.

Specs

CONSTRUCTION

FULL-WRAP IN-MOLD POLYCARBONATE SHELL WITH EPS LINER

SPORT

CYCLING

NUMBER OF VENTS

25

VENTILATION TYPE

WIND TUNNEL VENTS WITH INTERNAL CHANNELING

GENDER

MENS

FIT SYSTEM

ROC LOC® 5.5 MIPS®

CERTIFICATION

U.S.: CPSC BICYCLE FOR AGES 5+

E.U.: CE EN1078

Size Chart
GIRO SIZE GUIDE

These size charts and conversions are meant to serve as a guide. We recommend you try-on before riding to ensure full comfort and performance.

BIKE HELMET SIZE GUIDE

ADULT SUPER FIT BIKE HELMET SIZE   

CIRCUMFERENCE

S

51 - 55 cm

M

55 - 59 cm

L

59 - 63 cm

XL

63 - 65 cm


YOUTH BIKE HELMETSIZE

CIRCUMFERENCE

XS (Scamp Model)

45 - 49 cm

S (Scamp Model)

49 - 53 cm

XS (Dime Model)

47 - 51 cm 

S (Dime Model)

51 - 55 cm

Universal Child

47 - 54 cm

Universal Youth (Ages 5+)

50 - 57 cm


ADULT SUPER FIT FULL FACE BIKE HELMET

CIRCUMFERENCE

S

51 - 53 cm

M

51 - 55 cm

L

55 - 59 cm

XL

59 - 63 cm


ADULT UNIVERSAL BIKE HELMET       

CIRCUMFERENCE

Women Adult

50 - 57 cm

Unisex

54 - 61 cm

Extra Large

58 - 65 cm

 

SNOW HELMET SIZE GUIDE

ADULT SNOW HELMET SIZE

CIRCUMFERENCE

S

52 - 55.5 cm

M

55.5 - 59 cm

L

59 - 62.5 cm

XL

62.5 - 65 cm


YOUTH SNOW HELMET SIZE

CIRCUMFERENCE

XS

48.5 - 52 cm

S

52 - 55.5 cm

M

55.5 - 59 cm

 

MEN’S TOPS SIZE GUIDE

SIZE

CHEST

WAIST

XS

33 - 35” / 83.8 - 88.9 cm

27 - 29” / 68.6 - 73.7 cm

S

35 - 37” / 88.9 - 94 cm 

29 - 31” / 73.7 - 78.7 cm

M

38 - 40” / 96.5 - 101.6 cm

31 - 33” / 78.7 - 83.8 cm

L

41 - 43” / 104.1 - 109.2 cm 

33 - 35” / 83.8 - 88.9 cm

XL

44 - 46” / 111.8 - 116.8 cm 

35 - 37” / 88.9 - 94 cm

XXL

47 - 49” / 119.4 - 124.5 cm

37 - 39” / 94 - 99.1 cm

XXXL

50 - 52” / 127 - 132.1 cm

39 - 41” / 99.1 - 104.1 cm

 

WOMEN’S TOPS SIZE GUIDE

SIZE

CHEST

WAIST

XXS

30 - 31” / 76.2 - 78.7 cm

22 - 24” / 55.9 - 61 cm

XS

32 - 33” / 81.3 - 83. cm

24 - 26” / 61 - 66 cm 

S

34 - 35” / 86.4 - 88.9 cm

26 - 28” / 66 - 71.1 cm

M

36 - 37” / 91.4 - 94 cm 

28 - 30” / 71.1 - 76.2 cm 

L

38 - 39” / 96.5 - 99.1 cm

30 - 32” / 76.2 - 81.3 cm

XL

39 - 41” / 99.1 - 104.1 cm

32 - 34” / 81.3 - 86.4 cm

XXL

41 - 43” / 104.1 - 109.2 cm

34 - 36” / 86.4 - 91. 4cm 

 

MEN’S BOTTOMS SIZE GUIDE

SIZE

HIP

WAIST

28 (XS)

33 - 35” / 83.8 - 88.9 cm

27 - 29” / 68.6 - 73.7 cm

30 (S)

35 - 37” / 88.9 - 94 cm 

29 - 31” / 73.7 - 78.7 cm

32 (M)

38 - 40” / 96.5 - 101.6 cm 

31 - 33” / 78.7 - 83.8 cm

34 (L)

40 - 42” / 101.6 - 106.7 cm 

33 - 35” / 83.8 - 88.9 cm 

36 (XL)

42 - 44” / 106.7 - 111.8 cm 

35 - 37” / 88.9 - 94 cm

38 (XXL)

44 - 46” / 111.8 - 116.8 cm

37 - 39” / 94 - 99.1 cm

40 (XXXL)

46 - 48” / 116.8 - 121.9 cm

39 - 41” / 99.1 - 104.1 cm

 

WOMEN’S BOTTOMS SIZE GUIDE

SIZE

HIP

WAIST

XS

32 - 34” / 81.3 - 86.4 cm 

22 - 24” / 55.9 - 61 cm

S

34 - 36” / 86.4 - 91.4 cm 

24 - 26” / 61 - 66 cm

M

36 - 38” / 91.4 - 96.5 cm

26 - 28” / 66 - 71.1 cm

L

38 - 40” / 96.5 - 101.6 cm

28 - 30” / 71.1 - 76.2 cm 

XL

40 - 42” / 101.6 - 106.7 cm

30 - 32” / 76.2 - 81.3 cm

XXL

42 - 44” / 106.7 - 111.8 cm

32 - 34” / 81.3 - 86.4 cm 

XXXL

44 - 46” / 111.8 - 116.8 cm

34 - 36” / 86.4 - 91.4 cm


GLOVES SIZE GUIDE

MEN'S GLOVE SIZE  

HAND WIDTH

HAND LENGTH

XS (6)

6.3 - 7” / 160 - 178 mm

5.9 - 6.5” / 150 - 164 mm

S (7)

7” / 179 - 200 mm

6.5 - 7” / 165 - 179 mm

M (8)

8 - 8.6” / 201 - 219 mm

7 - 7.6” / 180 - 194 mm

L (9)

8.7 - 9” / 220 - 234 mm

7.7 - 8” / 195 - 204 mm

XL (10)

9.25 - 9.8” / 235 - 249 mm

8 - 8.6” / 205 - 21 9mm 

XXL (11)

9.85 - 10” / 250 - 265 mm

8.7 - 9.25” / 220 - 235 mm

XXXL (12)

10.4 - 10.6” / 265 - 270 mm

9.25 - 9.6” / 235 - 245 mm


WOMEN'S GLOVE SIZE

HAND WIDTH

HAND LENGTH

S (6)

6 - 6.7” / 155 - 169 mm

6.3 - 6.7” / 160 - 169 mm

M (7)

6.7 - 7.4” / 170 - 189 mm

6.7 - 7.2” / 170 - 18 mm

L (8)

7.4 - 8” / 190 - 204 mm

7.3 - 7.7” / 185 - 195 mm

XL (9)

8 - 8.3” / 205 - 210 mm

7.7 - 8” / 196 - 205 mm


YOUTH GLOVE SIZE

HAND WIDTH

HAND LENGTH

XS (3)

5.2 - 5.6” / 133 - 142 mm

5.9 - 6” / 150 - 154 mm

S (4)

5.6 - 5.9” / 143 - 152 mm

6 - 6.3” / 155 - 159 mm

M (5)

6 - 6.4” / 153 - 162 mm

6.3 - 6.5” / 160 - 165 mm

L (6)

6.4 - 6.8” / 163 - 172 mm

6.5 - 6.7” / 165 - 169 mm

 

SOCK SIZE GUIDE

SOCK SIZE

EU SHOE

MENS US SHOE

S

36 - 39

4 - 6.5

M

40 - 42 

7.5 - 9

L

43 - 45

9.5 - 11

XL

46 - 48

12 - 13.5

 

FOOTWEAR SIZE CONVERSIONS

EU SIZE 

US MENS

US WOMENS

36

5

37

6

37.5

6.5

38

6.5

38.5

7

39

6.5

7.5

39.5

7

8

40

7.5

8.5

40.5

7.5

8.5

41

8

9

41.5

8.5

9.5

42

9.5

10.5

42.5

9.5

10.5

43

9.5

10.5

43.5

10

44

10.5

44.5

11

46

12

46.5

12.5

47

13

48

13.5

49

14

50

15