Giro Men's Radix Mips Mountain Bike Helmet

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

    The Radix™ MIPS® helmet combines rugged style and durability to meet the demands of core trail riders, with the coverage, light weight, and ventilation riders need to ride comfortably and confidently all day. 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

    IMPACT MANAGEMENT

    INTEGRATED MIPS

    CONSTRUCTION

    FULL-WRAP IN-MOLD POLYCARBONATE SHELL WITH EPS LINER

    VENTILATION

    WIND TUNNEL VENTS WITH INTERNAL CHANNELING

    FIT SYSTEM

    ROC LOC® 5.5 MIPS®

    WEIGHT

    316G (SIZE MEDIUM CPSC)|300G (SIZE MEDIUM CE)

    CERTIFICATION

    COMPLIES WITH THE US CPSC SAFETY STANDARD FOR BICYCLE HELMET FOR PERSONS AGE 5 AND OLDER

    E.U.: CE EN1078

    HIGHLIGHTS

    P.O.V. ADJUSTABLE VISOR

    QUICK DRY PADDING

    SLIMLINE WEBBING

    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 HELMET SIZE

    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

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