WARNING: California’s Proposition 65
Proposition 65 Warning for California Consumers
Alpinestars Supertech M10 Solid Adult Off-Road Helmets (Brand New)
The Alpinestars Supertech S-M10 Carbon helmet uses a lightweight carbon fiber shell that comes in 4 different shell sizes. It's visor release system holds the visor/peak securely, but releases in the event of impact. Alpinestars provides 2 peaks with 2 different angles depending on the rider's preference. Ventilation is top notch with numerous inlet and outlet ports connected with a series of airways that snake through the interior. The internal liner is an amalgamation of protective and comfort materials. A multiple density inner liner absorbs impacts while a MIPS -E2 liner protects against rotational energy. Alpinestars' proprietary A-Head system is an adjustable head frame that allows you to adjust how the helmet sits on the head. Soft EPP foam cushions the bottom lip of the helmet to help avoid collarbone injury in the event of a crash. Emergency removable cheek pads along with a design prepared for the E-Ject helmet removal system make the Alpinestars Supertech S-M10 Carbon Helmet a protective motocross helmet filled to the brim with safety features.
New or Brand New - Brand new item in original packaging (original manufacturer's warranty may apply).
Refurbished - Professionally restored and in perfect working condition. Original packaging may be missing or slightly damaged.
Used - Item has seen limited use but remains in good working condition. May show some limited signs of wear with small scratches or cosmetic blemishes. May arrive with damaged packaging or be repackaged.
Refurbished, Without Tags - Same as refurbished. Item may arrive with mising labels or tags.
Refurbished, Last Call - Same as refurbished. Last call or closeout item.
Measure around the fullest part, under the armpits, keeping the tape horizontal.
Measure around the natural waist line, inline with the navel, keeping the tape horizontal.
Measure around the fullest part of your hips, about 20cm below waist line, keeping the tape horizontal.
Measure around the thigh just below the crotch, keeping the tape horizontal.
Stand against a wall, ask someone else to measure from the crotch to the bottom of your leg.
Measure from shoulder (Humerus) to wrist.
Stand against a wall, ask someone else to measure from the oor to the top of your head, keeping the tape vertical.
| Euro Size | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 | 56 | 58 | 60 | 62 | 64 |
| International Size | XXS | XXS | XS | XS | S | S | S | M | M | L | L | XL | L | XL | XL | XXL | XXL | XXL | 3XL | 3XL | 4XL |
| U.S. Size | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 |
| U.S. Pant Size | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 |
| A | Chest (Inches) | 30 3/4- 32 1/4 | 32 1/4- 33 7/8 | 33 7/8- 35 3/8 | 35 3/8- 37 | 37 - 38 5/8 | 38 5/8- 40 1/8 | 40 1/8- 41 3/4 | 41 3/4- 43 1/4 | 43 1/4- 44 7/8 | 44 7/8- 46 1/2 | 46 1/2- 48 | 48 - 49 5/8 | 49 5/8- 51 1/8 |
| B | Waist (Inches) | 25 1/4- 26 3/4 | 26 3/4- 28 3/8 | 28 3/8- 29 7/8 | 29 7/8- 31 1/2 | 31 1/2- 33 1/8 | 33 1/8- 34 5/8 | 34 5/8- 36 1/4 | 36 1/4- 37 3/4 | 37 3/4- 39 1/4 | 39 1/4- 41 | 41 - 42 1/2 | 42 1/2- 44 1/8 | 44 1/8- 45 5/8 |
| C | Hip (Inches) | 31 1/8- 32 5/8 | 32 5/8- 34 1/4 | 34 1/4- 35 7/8 | 35 7/8- 37 3/8 | 37 3/8- 39 | 39 - 40 1/2 | 40 1/2- 42 1/8 | 42 1/8- 43 3/4 | 43 3/4- 45 1/4 | 45 1/4- 46 7/8 | 46 7/8- 48 3/8 | 48 3/8- 50 | 50 - 51 5/8 |
| D | Thigh (Inches) | 19 3/8- 19 5/8 | 19 5/8- 20 1/8 | 20 1/2- 20 7/8 | 21 1/4- 21 5/8 | 22 - 22 1/2 | 22 7/8- 23 1/4 | 23 5/8- 24 | 24 3/8- 24 3/4 | 25 1/4- 25 5/8 | 26 - 26 3/8 | 26 3/4- 27 1/8 | 27 1/2- 28 | 28 3/8- 28 1/2 |
| E | Inseam (Inches) | 28 - 28 3/4 | 28 3/4- 29 1/8 | 29 1/2- 29 7/8 | 30 3/8- 30 3/4 | 31 1/8- 31 1/2 | 31 7/8 - 32 1/4 | 32 5/8 - 33 1/8 | 33 1/2 - 33 7/8 | 34 1/4 - 34 5/8 | 35 - 35 3/8 | 35 - 35 3/8 | 35 7/8 - 36 1/4 | 35 7/8 - 36 1/4 |
| F | Outer Arm (Inches) | 19 1/4 - 20 1/8 | 20 1/8 - 20 3/4 | 20 7/8 - 21 1/4 | 21 5/8 - 22 | 22 1/2 - 22 7/8 | 23 1/4 - 23 5/8 | 24 - 24 3/8 | 24 3/4 - 25 1/4 | 25 5/8 - 26 | 26 3/8 - 26 3/4 | 26 3/8 - 26 3/4 | 27 1/8 - 27 1/2 | 27 1/8 - 27 1/2 |
| G | Height (Inches) | 4'11" - 5'1" | 5'2" - 5'4" | 5'4" - 5'5 | 5'6" - 5'7" | 5'7" - 5'8" | 5'9" - 5'10" | 5'11" - 6'" | 6" - 6'2" | 6'2" - 6'3" | 6'3" - 6'5" | 6'3" - 6'5" | 6'5" - 6'6" | 6'5" - 6'6" |
| Euro Size | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 | 56 | 58 | 60 | 62 | 64 |
| International Size | XXS | XXS | XS | XS | S | S | S | M | M | L | L | XL | L | XL | XL | XXL | XXL | XXL | 3XL | 3XL | 4XL |
| U.S. Size | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 |
| U.S. Pant Size | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 |
| A. Chest (cm) | 78 - 82 | 82 - 86 | 86 - 90 | 90 - 94 | 94 - 98 | 98 - 102 | 102 - 106 | 106 - 110 | 110 - 114 | 114 - 118 | 118 - 122 | 122 - 126 | 126 - 130 |
| B. Waist (cm) | 64 - 68 | 68 - 72 | 72 - 76 | 76 - 80 | 80 - 84 | 84 - 88 | 88 - 92 | 92 - 96 | 96 - 100 | 100 - 104 | 104 - 108 | 108 - 112 | 112 - 116 |
| C. Hip (cm) | 79 - 83 | 83 - 87 | 87 -91 | 91 - 95 | 95 - 99 | 99 - 103 | 103 - 107 | 107 - 111 | 111 - 115 | 115 - 119 | 119 - 123 | 123 - 127 | 127 - 131 |
| D. Thigh (cm) | 48 - 49 | 50 - 51 | 52 - 53 | 54 - 55 | 56 - 57 | 58 - 59 | 60 - 61 | 62 - 63 | 64 - 65 | 66 - 67 | 68 - 69 | 70 - 71 | 72 - 73 |
| E. Inseam (cm) | 71 - 72 | 73 - 74 | 75 - 76 | 77 - 78 | 79 - 80 | 81 - 82 | 83 - 84 | 85 -86 | 87 - 88 | 89 - 90 | 89 - 90 | 91 - 92 | 91 - 92 |
| F. Outer Arm (cm) | 49 - 50 | 51 - 52 | 53 - 54 | 55 - 56 | 57 - 58 | 59 - 60 | 61 - 62 | 63 - 64 | 65 - 66 | 67 - 68 | 67 - 68 | 69 - 70 | 69 - 70 |
| G. Height (cm) | 150 - 156 | 157 - 163 | 164 - 167 | 168 - 171 | 172 - 175 | 176 - 179 | 180 - 183 | 184 - 187 | 188 - 191 | 192 - 195 | 192 - 195 | 196 - 199 | 196 - 199 |
| Europe | 38 | 39 | 40.5 | 42 | 43 | 44.5 | 45.5 | 47 | 48 | 49.5 | 51 | 52 |
| USA | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Japan | 24 | 25 | 25.5 | 26.5 | 27.5 | 29 | 29.5 | 30.5 | 31.5 | 32.5 | 33.5 | 34.5 |
Measure around the chest under the armpits, keeping the tape horizontal.
Measure around the fullest part of the bust, keeping the tape horizontal.
Measure around the natural waist line, inline with the navel, keeping the tape horizontal.
Measure around the fullest part of your hips, about 20cm below waist line, keeping the tape horizontal.
Measure around the thigh just below the crotch, keeping the tape horizontal.
Stand against a wall, ask someone else to measure from the crotch to the bottom of your leg.
Measure from shoulder (Humerus) to wrist.
Stand against a wall, ask someone else to measure from the floor to the top of your head, keeping the tape vertical.
| Euro Size | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 |
| International Size | XXS | XXS | XS | XS | S | M | L | L | XL | XL | XXL | XXL | XXL | 3XL | 3XL |
| U.S. Size | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
| U.S. Pant Size | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 |
| A. Chest (Inches) | 29 1/8 - 30 3/4 | 30 3/4 - 32 1/4 | 32 1/4 - 33 7/8 | 33 7/8 - 35 3/8 | 35 3/8 - 37 | 37 - 38 5/8 | 38 5/8 - 40 1/8 | 40 1/8 - 41 3/4 | 41 3/4 - 43 1/4 | 43 1/4 - 44 7/8 |
| B. Bust (Inches) | 30 3/4 - 32 1/4 | 32 1/4 - 33 7/8 | 33 7/8 - 35 3/8 | 35 3/8 - 37 | 37 - 38 5/8 | 38 5/8 - 40 1/8 | 40 1/8 - 41 3/4 | 41 3/4 - 43 1/4 | 43 1/4 - 44 7/8 | 44 7/8 - 46 1/2 |
| C. Waist (Inches) | 22 7/8 - 24 3/8 | 24 3/8 - 26 | 26 - 27 1/2 | 27 1/2 - 29 1/8 | 29 1/8 - 30 3/4 | 30 3/4 - 32 1/4 | 32 1/4 - 33 7/8 | 33 7/8 - 35 3/8 | 35 3/8 - 37 | 37 - 38 5/8 |
| D. Hip (Inches) | 32 1/4 - 33 7/8 | 33 7/8 - 35 3/8 | 35 3/8 - 37 | 37 - 38 5/8 | 38 5/8 - 40 1/8 | 40 1/8 - 41 3/4 | 41 3/4 - 43 1/4 | 43 1/4 - 44 7/8 | 44 7/8 - 46 1/2 | 46 1/2 - 48 |
| E. Thighs (Inches) | 19 5/8 - 20 1/8 | 20 1/2 - 20 7/8 | 21 1/4 - 21 5/8 | 22 - 22 1/2 | 22 7/8 - 23 1/4 | 23 5/8 - 24 | 24 3/8 - 24 3/4 | 25 1/4 - 25 5/8 | 26 - 26 3/8 | 26 3/4 - 27 1/8 |
| F. Inner Legs (Inches) | 28 3/8 - 28 3/4 | 29 1/8 - 29 1/2 | 29 7/8 - 30 3/8 | 30 3/4 - 31 1/8 | 31 1/2 - 31 7/8 | 32 1/4 - 32 5/8 | 33 1/8 - 33 1/2 | 33 1/8 - 33 1/2 | 33 7/8 - 34 1/4 | 33 7/8 - 34 1/4 |
| G. Outer Legs (Inches) | 19 5/8 - 20 1/8 | 20 1/2 - 20 7/8 | 21 1/4 - 21 5/8 | 22 - 22 1/2 | 22 7/8 - 23 1/4 | 23 5/8 - 24 | 24 3/8 - 24 3/4 | 24 3/8 - 24 3/4 | 25 1/4 - 25 5/8 | 25 1/4 - 25 5/8 |
| H. Height (Inches) | 5'2"- 5'3" | 5'4"- 5'5" | 5'5"- 5'6" | 5'7"- 5'8" | 5'8"- 5'9" | 5'10"- 5'11" | 5'11"- 6'" | 5'11"- 6'" | 6'1"- 6'2" | 6'1"- 6'2" |
| Europe | 37 | 38 | 39 | 41 | 42 |
| USA | 6 | 7 | 8 | 9 | 10 |
| Japan | 23 | 24 | 25 | 26 | 26.5 |
| Measurement | Letter Sizing | Numeric Sizing |
|---|---|---|
| 2 1/8" - 2 5/8" | XS | 7 |
| 2 5/8" - 3 1/8" | SM | 8 |
| 3 1/8" - 3 5/8" | MD | 9 |
| 3 5/8" - 4 1/8" | LG | 10 |
| 4 1/8" - 4 5/8" | XL | 11 |
| 4 5/8" - 5 1/8" | XXL | 12 |
| 5 1/8" - 5 5/8" | XXXL | 13 |
| US | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| EU | 38 | 39 | 40.5 | 42 | 43 | 44.5 | 45.5 | 47 | 48 | 49.5 | 51 | 52 |
| US | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| EU | 38 | 39 | 40.5 | 42 | 43 | 44.5 | 45.5 | 47 | 48 | 49.5 | 51 | 52 |
| Size | A. CHEST | B. WAIST | F. OUTER ARM | G. HEIGHT | ||||
|---|---|---|---|---|---|---|---|---|
| US | Inches | Centimeters | Inches | Centimeters | Inches | Centimeters | Inches | Centimeters |
| XXS | 30 3/4 | 78 | 24 3/4 | 63 | 19 1/4 | 49 | 61 3/4 | 157 |
| XS | 32 7/8 | 83.5 | 27 1/8 | 69 | 20 1/8 | 51 | 63 3/4 | 162 |
| S | 32 7/8 | 83.5 | 27 1/8 | 69 | 20 1/4 | 51.5 | 64 1/8 | 163 |
| M | 35 | 89 | 29 1/2 | 75 | 21 | 53.5 | 66 1/8 | 168 |
| L | 37 1/4 | 94.5 | 31 7/8 | 81 | 21 1/2 | 54.5 | 66 1/2 | 169 |
| XL | 39 3/8 | 100 | 34 1/4 | 87 | 22 1/4 | 56.5 | 68 1/2 | 174 |
| XXL | 41 1/2 | 105.5 | 36 1/4 | 92 | 23 1/4 | 59 | 68 7/8 | 175 |
| 3XL | 43 3/4 | 111 | 38 1/4 | 97 | 23 5/8 | 60 | 70 1/2 | 179 |
| 4XL | 45 7/8 | 116.5 | 40 1/8 | 102 | 24 3/8 | 62 | 70 7/8 | 180 |
| 5XL | 48 | 122 | 42 1/8 | 107 | 24 3/4 | 63 | 72 1/2 | 184 |
| 6XL | 50 1/4 | 127.5 | 44 1/8 | 112 | 25 5/8 | 65 | 72 7/8 | 185 |
| Size | A| Chest | B| Waist | C| Hip | D| Inseam | E| Height | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| EU | Inches | Centimeters | Inches | Centimeters | Inches | Centimeters | Inches | Centimeters | Inches | Centimeters |
| 44 | 33 7/8 | 86 | 28 3/8 | 72 | 34 1/4 | 87 | 29 1/2 | 75 | 65 | 165 |
| 46 | 35 3/8 | 90 | 29 7/8 | 76 | 35 7/8 | 91 | 29 7/8 | 76 | 66 1/8 | 168 |
| 48 | 35 3/8 | 90 | 29 7/8 | 76 | 35 7/8 | 91 | 30 1/4 | 77 | 66 1/2 | 169 |
| 50 | 37 | 94 | 31 1/2 | 80 | 37 1/2 | 95 | 30 3/4 | 78 | 67 3/4 | 172 |
| 52 | 37 | 94 | 31 1/2 | 80 | 37 1/2 | 95 | 31 | 79 | 68 1/8 | 173 |
| 54 | 38 5/8 | 98 | 33 1/8 | 84 | 39 | 99 | 31 1/2 | 80 | 69 3/4 | 176 |
| 56 | 38 5/8 | 98 | 33 1/8 | 84 | 39 | 99 | 31 7/8 | 81 | 69 3/4 | 177 |
| 58 | 40 1/8 | 102 | 34 5/8 | 88 | 40 1/2 | 103 | 32 1/4 | 82 | 70 7/8 | 180 |
| 60 | 40 1/8 | 102 | 34 5/8 | 88 | 40 1/2 | 103 | 32 5/8 | 83 | 71 1/4 | 181 |
| 62 | 41 3/4 | 106 | 36 1/4 | 92 | 42 1/8 | 107 | 33 1/8 | 84 | 72 1/8 | 184 |
| 64 | 41 3/4 | 106 | 36 1/4 | 92 | 42 1/8 | 107 | 33 1/2 | 85 | 72 7/8 | 185 |
| 66 | 43 1/4 | 110 | 37 3/4 | 96 | 43 3/4 | 111 | 33 7/8 | 86 | 72 7/8 | 188 |
| 68 | 43 1/4 | 110 | 37 3/4 | 96 | 43 3/4 | 111 | 33 7/8 | 86 | 74 | 188 |
| Measurement | Letter Sizing | Numeric Sizing |
|---|---|---|
| 2 1/8" - 2 5/8" | XS | 7 |
| 2 5/8" - 3 1/8" | SM | 8 |
| 3 1/8" - 3 5/8" | MD | 9 |
| 3 5/8" - 4 1/8" | LG | 10 |
| 4 1/8" - 4 5/8" | XL | 11 |
| 4 5/8" - 5 1/8" | XXL | 12 |
| 5 1/8" - 5 5/8" | XXXL | 13 |
| US | 6 | 7 | 8 | 9 | 10 |
| EU | 37 | 38 | 39 | 41 | 42 |
| US | 6 | 7 | 8 | 9 | 10 |
| EU | 37 | 38 | 39 | 41 | 42 |
| Size | A| Chest | B| Bust | C| Waist | D| Hip | G| Outer Arm | H| Height | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| US | Inches | Centimeters | Inches | Centimeters | Inches | Centimeters | Inches | Centimeters | Inches | Centimeters | Inches | Centimeters |
| XS | 29 1/8 | 74 | 30 3/4 | 78 | 22 7/8 | 58 | 32 1/4 | 82 | 19 3/4 | 50 | 61 3/4 | 157 |
| S | 31 1/2 | 80 | 33 1/8 | 84 | 25 1/4 | 64 | 34 5/8 | 88 | 20 5/8 | 52.5 | 64 | 162.5 |
| M | 33 7/8 | 86 | 35 3/8 | 90 | 27 1/2 | 70 | 37 | 94 | 21 5/8 | 55 | 66 1/8 | 168 |
| L | 35 3/8 | 90 | 37 | 94 | 29 1/8 | 74 | 38 5/8 | 98 | 22 5/8 | 57.5 | 67 3/4 | 172 |
| XL | 37 1/4 | 94.5 | 38 3/4 | 98.5 | 30 7/8 | 78.5 | 40 3/8 | 102.5 | 23 3/8 | 59.5 | 69 1/2 | 176.5 |
| XXL | 39 | 99 | 40 1/2 | 103 | 32 5/8 | 83 | 42 1/8 | 107 | 24 1/4 | 61.5 | 71 | 180.5 |
| 3XL | 39 | 99 | 40 1/2 | 103 | 32 5/8 | 83 | 42 1/8 | 107 | 24 1/4 | 61.5 | 71 | 180.5 |
| 4XL | 41 | 104 | 42 1/2 | 108 | 34 5/8 | 88 | 44 1/8 | 112 | 25 1/4 | 64 | 72 7/8 | 185 |
| 5XL | 43 | 109 | 44 1/2 | 113 | 36 5/8 | 93 | 46 | 117 | 25 7/8 | 65.5 | 74 | 188 |
| Size | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 |
|---|---|---|---|---|---|---|---|---|---|
| A. Chest (cm) | 78 | 82 | 82 | 86 | 86 | 90 | 90 | 94 | 94 |
| B. Bust (cm) | 82 | 86 | 86 | 90 | 90 | 94 | 94 | 98 | 98 |
| C. Waist (cm) | 62 | 66 | 66 | 70 | 70 | 74 | 74 | 78 | 78 |
| D. Hip (cm) | 86 | 90 | 90 | 94 | 94 | 98 | 98 | 102 | 102 |
| F. Inner Leg (cm) | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 |
| G. Outer Arm (cm) | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 |
| H. Height (cm) | 161 | 164 | 165 | 168 | 169 | 172 | 173 | 176 | 177 |
| A. Chest (in) | 30 3/4 | 32 1/4 | 32 1/4 | 33 7/8 | 33 7/8 | 35 3/8 | 35 3/8 | 37 | 37 |
| B. Bust (in) | 32 1/4 | 33 7/8 | 33 7/8 | 35 3/8 | 35 3/8 | 37 | 37 | 38 5/8 | 38 5/8 |
| C. Waist (in) | 24 3/8 | 26 | 26 | 27 1/2 | 27 1/2 | 29 1/8 | 29 1/8 | 30 3/4 | 30 3/4 |
| D. Hip (in) | 33 7/8 | 35 3/8 | 35 3/8 | 37 | 37 | 38 5/8 | 38 5/8 | 40 1/8 | 40 1/8 |
| F. Inner Leg (in) | 29 1/8 | 29 1/2 | 29 7/8 | 30 1/4 | 30 3/4 | 31 1/8 | 31 1/8 | 31 7/8 | 31 7/8 |
| G. Outer Arm (in) | 20 1/2 | 20 7/8 | 21 1/4 | 21 5/8 | 22 | 22 1/2 | 22 7/8 | 23 1/4 | 23 5/8 |
| H. Height (in) | 63 3/8 | 64 5/8 | 65 | 66 1/8 | 66 1/2 | 67 3/4 | 68 1/8 | 69 1/4 | 69 5/8 |
* Sizing information is provided by the manufacturer and does not guarantee a perfect fit.
