Product Details

The Alpinestars S-M7 Cast Helmet is engineered for serious off-road riders who demand top-tier protection and lightweight performance. Built with an advanced multi-layer composite shell using fiberglass, carbon, and aramid fiber, the S-M7 is designed to deliver exceptional impact management while helping reduce neck fatigue during long motos or trail rides.

Its aerodynamic shell shape is optimized to help deflect energy during impacts, while Alpinestars’ patented rotational impact management technology helps reduce forces transferred to the rider. Integrated PLASMA side padding adds another layer of energy absorption in critical zones for enhanced protection.

The S-M7 Cast Helmet also excels in rider comfort with 20 intake and exhaust ports for outstanding airflow, helping keep you cooler during hot races and demanding rides. A removable moisture-wicking antimicrobial liner, hydration tube routing channels, and emergency-ready design round out this premium package.

Finished in the aggressive Cast graphic, the S-M7 combines pro-level protection, modern styling, and race-focused comfort for motocross, ATV, and off-road riders.

Features

All the pro-level safety and performance features with fiberglass construction (versus the Supertech M10's carbon fiber shell)
A performance dirt helmet that maintains creature comforts like speaker cutouts and compatibility with hydration systems
Alpinestars revised Plasma energy-absorbing technology
Smooth, signature Alpinestars styling from top to bottom
Massive eyeport and fantastic ventilation
Multi-layer shell is constructed from a blend of fiberglass, carbon, and Aramid fiber
Energy-deflecting curved design is engineered to reduce friction and deflect impact forces away from the head
3 shell sizes: XS-MD, LG, XL-2XL
Integrated channels on both sides to accommodate a hydration system
Engineered to automatically detach from the shell when it is subjected to an impact energy greater than 15 Joules for optimum impact protection, regardless of the direction
20 individual intake and exhaust ports, 13 intakes and 7 exhausts for optimum ventilation
Patented A-Head Fitment System allows easy adjustment of the angle and height that the helmet sits on the head for an optimized performance fit
3D foam for optimum comfort, the lining features an anti-microbial treatment for long-lasting freshness
Replacement cheek pads are available in all thicknesses and exchangeable between all shell sizes for a customized fit
Specific rotational impact protection is provided by the combination of the internal shape and specific coating of the EPS liner, coupled to specially-developed surface in the comfort liner
Patented Plasma technology in side pads provide high performance shock absorption
Helmet designed to accommodate the installation of an eject removal system, which includes a removable insert on top of the EPS
Profiled chin bar for proven impact protection

Sizing Info

The Alpinestars S-M7 Cast Helmet generally fits true to size with a snug performance-oriented fit. It should feel secure around the cheeks and crown when new without painful pressure points. Riders between sizes often size up for added comfort, while racers usually prefer the tighter fit for maximum stability.

Payment & Security

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

New

Alpinestars 2026 SM7 Cast Helmet

Name: Alpinestars 2026 SM7 Cast Helmet
Brand: Alpinestars
Price: 519.95 USD
Availability: InStock

Brand: Alpinestars

Type: Helmet

$519.95

$519.95 ~~$0.00~~

Shipping calculated at checkout.

Available in stock (30)

Riding Styles

Motocross (MX), Off-Road, ATV, UTV/Side-by-Side

The Alpinestars S-M7 Cast Helmet is a high-performance off-road helmet built for riders who want premium protection, lightweight comfort, and race-ready ventilation. Featuring advanced composite shell construction and bold Cast graphics, it is ideal for motocross, enduro, and aggressive trail riding.

Color: Blue/Pink/Yellow Fluo

Size: SM

SM MD LG XL 2XL

Alpinestars Size Chart

Helmet Size Chart

How to Measure

A. Head Circumference: Using a measuring tape, measure the head circumference at the head’s widest point, just above the eyebrows and the ears.

Alpinestars Helmet Size Chart

Size	Circumference (CM)	Circumference (IN)
XS	53 – 54	20.8 – 21.2
S	55 – 56	21.6 – 22
M	57 – 58	22.4 – 22.8
L	59 – 60	23.2 – 23.6
XL	61 – 62	24 – 24.4
XXL	63 – 64	24.8 – 25.2

Glove Size Chart – How to Measure

A. Hand Circumference: Wrap a measuring tape around your hand behind the knuckles, not including the thumb, keeping the tape snug. Measure both left and right hands and use the larger of the two measurements.

Men's Glove Size Chart

International Size	XS	S	M	L	XL	XXL	3XL
Hand Circumference (Inches)	7½ - 8	8 - 8½	8½ - 9	9 - 9½	9½ - 10	10 - 11	—
Hand Circumference (CM)	17.8 - 20.3	20.3 - 21.6	21.6 - 22.9	22.9 - 24.1	24.1 - 25.4	25.4 - 27.9	—

Women's Glove Size Chart

International Size	XS	S	M	L	XL
Hand Circumference (Inches)	6½ - 7	7 - 7½	7½ - 8	8 - 8½	8½ - 9
Hand Circumference (CM)	16.5 - 17.8	17.8 - 19	19 - 20.3	20.3 - 21.6	21.6 - 22.9

Men's Size Chart – How to Measure

A. Chest: Measure around the fullest part, under the armpits, keeping the tape horizontal.
B. Waist: Measure around the natural waist line, inline with the navel, keeping the tape horizontal.
C. Hip: Measure around the fullest part of your hips, about 20cm below waist line, keeping the tape horizontal.
D. Thigh: Stand against a wall, ask someone else to measure from the crotch to the bottom of your leg
E. Inner Leg: Measure around the thigh just below the crotch, keeping the tape horizontal.
F. Outer Arm: Measure from shoulder (Humerus) to wrist.
G. Height: Stand against a wall, ask someone else to measure from the floor to the top of your head, keeping the tape vertical.

Men’s Size Guide

Men’s Textile Jacket Sizing

Size	A. Chest (in)	B. Waist (in)	F. Arm (in)	G. Height (in)
2XS	30.7–32.9	24.8–27.2	19.3–20.1	61.8–63.8
XS	32.9–35.0	27.2–29.5	20.1–21.1	64.2–66.1
SM	35.0–37.2	29.5–31.9	21.5–22.2	66.5–68.5
MD	37.2–39.4	31.9–34.3	22.6–23.2	68.9–70.5
LG	39.4–41.5	34.3–36.2	23.6–24.4	70.9–72.4
XL	41.5–43.7	36.2–38.2	24.8–25.6	72.8–74.4
2XL	43.7–45.9	38.2–40.2	26.0–26.8	74.8–76.4
3XL	45.9–48.0	40.2–42.1	26.0–26.8	74.8–76.4
4XL	48.0–50.2	42.1–44.1	26.8–27.6	76.8–78.3
5XL	50.2–52.4	44.1–46.1	26.8–27.6	76.8–78.3
6XL	52.4–54.5	46.1–48.0	26.8–27.6	76.8–78.3

Men’s Leather Jacket Sizing

Euro	USA	A. Chest (in)	B. Waist (in)	F. Arm (in)	G. Height (in)
44	34	33.9–35.4	28.3–29.9	21.3–21.7	65.0–66.1
46	36	35.4–37.0	29.9–31.5	22.0–22.4	66.5–67.7
48	38	37.0–38.6	31.5–33.1	22.8–23.2	68.1–69.3
50	40	38.6–40.2	33.1–34.6	23.6–24.0	69.7–70.9
52	42	40.2–41.7	34.6–36.2	24.4–24.8	71.3–72.4
54	44	41.7–43.3	36.2–37.8	25.2–25.6	72.8–74.0
56	46	43.3–44.9	37.8–39.4	25.6–26.0	74.4–75.6
58	48	44.9–46.5	39.4–40.9	26.4–26.8	75.6–76.8
60	50	46.5–48.0	40.9–42.5	26.4–26.8	75.6–76.8
62	52	48.0–49.6	42.5–44.1	26.8–27.2	77.2–78.3
64	54	49.6–51.2	44.1–45.7	26.8–27.2	77.2–78.3
66	56	51.2–52.8	45.7–47.2	26.8–27.2	77.2–78.3
68	58	52.8–54.3	47.2–48.8	26.8–27.2	77.2–78.3

Men’s Riding Jeans Sizing

Size	B. Waist (in)	C. Hips (in)	D. Thigh (in)	E. Inseam (in)
26	29.5–31.1	35.4–37.0	21.1–21.5	30.3–30.5
28	31.1–31.9	37.0–37.8	21.9–22.0	30.7–30.9
30	32.7–33.5	38.6–39.4	22.6–22.8	31.5–31.7
32	34.3–35.0	40.2–40.9	23.4–23.6	32.3–32.5
34	35.8–36.6	41.7–42.5	24.2–24.4	33.1–33.3
36	36.6–38.6	42.5–44.5	24.8–25.2	33.5–33.9
38	37.8–40.6	44.5–46.5	25.6–26.0	34.1–34.4
40	40.6–42.5	46.5–48.4	26.4–26.8	34.6–35.0

Men’s Leather Pant Sizing

Euro	B. Waist (in)	C. Hips (in)	D. Thigh (in)
44	28.3–29.9	34.3–35.8	20.5–20.9
46	29.9–31.5	35.8–37.4	21.3–21.7
48	31.5–33.1	37.4–39.0	22.0–22.4
50	33.1–34.6	39.0–40.6	22.8–23.2
52	34.6–36.2	40.6–42.1	23.6–24.0
54	36.2–37.8	42.1–43.7	24.4–24.8
56	37.8–39.4	43.7–45.3	25.2–25.6
58	39.4–40.9	45.3–46.9	26.0–26.4
60	40.9–42.5	46.9–48.4	26.8–27.2
62	42.5–44.1	48.4–50.0	27.6–28.0
64	44.1–45.7	50.0–51.6	28.3–28.7
66	45.7–47.2	51.6–53.1	29.1–29.5
68	47.2–48.8	53.1–54.7	29.9–30.3

Men’s Textile Pants Sizing

Size	B. Waist (in)	C. Hips (in)	D. Thigh (in)	E. Inseam (in)	G. Height (in)
2XS	24.8–27.2	31.1–33.3	18.9–19.9	28.0–28.7	61.8–63.8
XS	27.2–29.5	33.3–35.4	19.9–20.9	29.1–29.9	64.2–66.1
SM	29.5–31.9	35.4–37.6	20.9–21.9	30.3–31.1	66.5–68.5
MD	31.9–34.3	37.6–39.8	21.9–22.8	31.5–32.3	68.9–70.5
LG	34.3–36.2	39.8–41.9	22.8–23.8	32.7–33.5	70.9–72.4
XL	36.2–38.2	41.9–44.1	23.8–24.8	33.9–34.6	72.8–74.4
2XL	38.2–40.2	44.1–46.3	24.8–25.8	35.0–35.8	74.8–76.4
3XL	40.2–42.1	46.3–48.4	25.8–26.8	35.0–35.8	74.8–76.4
4XL	42.1–44.1	48.4–50.6	26.8–27.8	35.8–36.2	76.8–78.3
5XL	44.1–46.1	50.6–52.8	27.8–28.7	35.8–36.2	76.8–78.3
6XL	46.1–48.0	52.8–54.9	28.7–29.7	35.8–36.2	76.8–78.3

Men’s Race Suit Sizing

Euro	A. Chest (in)	B. Waist (in)	C. Hips (in)	E. Inseam (in)	F. Arm (in)	G. Height (in)
44	33.9–35.4	28.3–29.9	34.3–35.8	29.5–29.9	21.3–21.7	65.0–66.1
46	35.4–37.0	29.9–31.5	35.8–37.4	30.3–30.7	22.0–22.4	66.5–67.7
48	37.0–38.6	31.5–33.1	37.4–39.0	31.1–31.5	22.8–23.2	68.1–69.3
50	38.6–40.2	33.1–34.6	39.0–40.6	31.9–32.3	23.6–24.0	69.7–70.9
52	40.2–41.7	34.6–36.2	40.6–42.1	32.7–33.1	24.4–24.8	71.3–72.4
54	41.7–43.3	36.2–37.8	42.1–43.7	33.5–33.9	25.2–25.6	72.8–74.0
56	43.3–44.9	37.8–39.4	43.7–45.3	34.3–34.6	25.6–26.0	74.4–75.6
58	44.9–46.5	39.4–40.9	45.3–46.9	35.0–35.4	26.4–26.8	75.6–76.8
60	46.5–48.0	40.9–42.5	46.9–48.4	35.0–35.4	26.4–26.8	75.6–76.8
62	48.0–49.6	42.5–44.1	48.4–50.0	35.8–36.2	26.8–27.2	77.2–78.3
64	49.6–51.2	44.1–45.7	50.0–51.6	35.8–36.2	26.8–27.2	77.2–78.3
66	51.2–52.8	45.7–47.2	51.6–53.1	35.8–36.2	26.8–27.2	77.2–78.3
68	52.8–54.3	47.2–48.8	53.1–54.7	35.8–36.2	26.8–27.2	77.2–78.3

Women's Size Chart – How to Measure

Alpinestars women's size measurement guide

A. Chest: Measure around the chest under the armpits, keeping the tape horizontal.
B. Bust: Measure around the fullest part of the bust, keeping the tape horizontal.
C. Waist: Measure around the natural waist line, inline with the navel, keeping the tape horizontal.
D. Hip: Measure around the fullest part of your hips, about 20cm below waist line, keeping the tape horizontal.
E. Thigh: Measure around the thigh just below the crotch, keeping the tape horizontal.
F. Inner Leg: Stand against a wall, ask someone else to measure from the crotch to the bottom of your leg.
G. Outer Arm: Measure from shoulder (Humerus) to wrist.
H. Height: Stand against a wall, ask someone else to measure from the floor to the top of your head, keeping the tape vertical.

Women’s Size Guide

Women’s Alpha Sized Jackets

Alpha Size	A. Chest (in)	B. Bust (in)	C. Waist (in)	D. Hips (in)	G. Arm (in)	H. Height (in)
XS	29.1–31.5	30.7–33.1	22.8–25.2	32.3–34.6	19.7–20.7	61.8–64.0
SM	31.5–33.9	33.1–35.4	25.2–27.6	37.0	21.7–21.9	64.0–66.1
MD	33.9–35.4	35.4–37.0	27.6–29.1	37.0–38.6	21.9–22.6	66.3–67.7
LG	35.4–37.2	37.0–38.8	29.1–30.9	38.6–40.4	22.8–23.4	67.9–69.5
XL	37.2–39.0	38.8–40.6	30.9–32.7	40.4–42.1	23.6–24.2	69.5–71.1
2XL	39.0–40.9	40.6–42.5	32.7–34.6	42.1–44.1	24.2–24.6	71.1–71.9
3XL	40.9–42.9	42.5–44.5	34.6–36.6	44.1–46.1	24.8–25.2	71.9–72.8
4XL	42.9–44.9	44.5–46.5	36.6–38.6	46.1–48.0	25.2–25.6	73.0–74.0

Women’s Numeric Size Jackets

Size	A. Chest (in)	B. Bust (in)	C. Waist (in)	D. Hips (in)	G. Arm (in)	H. Height (in)
38	30.7–32.3	32.3–33.9	24.4–26.0	33.9–35.4	20.5–20.9	63.4–64.6
40	32.3–33.9	33.9–35.4	26.0–27.6	35.4–37.0	21.3–21.7	65.0–66.1
42	33.9–35.4	35.4–37.0	27.6–29.1	37.0–38.6	22.0–22.4	66.5–67.7
44	35.4–37.0	37.0–38.6	29.1–30.7	38.6–40.2	22.8–23.2	68.1–69.3
46	37.0–38.6	38.6–40.2	30.7–32.3	40.2–41.7	23.6–24.0	69.7–70.9
48	38.6–40.2	40.2–41.7	32.3–33.9	41.7–43.3	24.4–24.8	71.3–72.4
50	40.2–41.7	41.7–43.3	33.9–35.4	43.3–44.9	24.4–24.8	71.3–72.4
52	41.7–43.3	43.3–44.9	35.4–37.0	44.9–46.5	25.2–25.6	72.8–74.0
54	43.3–44.9	44.9–46.5	37.0–38.6	46.5–48.0	25.2–25.6	72.8–74.0

Women’s Armored Jacket Sizing

Size	Bust (in)	Waist (in)
SM	31.5–33.9	25.2–27.6
MD	33.9–35.4	27.6–29.1
LG	35.4–37.2	29.1–30.9

Women’s Race Suit Sizing

Euro	Bust (in)	Arm (in)	Waist (in)	Hips (in)	Thigh (in)	Inseam (in)	Height (in)
38	32.3–33.9	20.5–20.9	24.4–26.0	35.0–35.4	20.5–20.9	29.1–29.5	63.4–64.6
40	33.9–35.4	21.3–21.7	26.0–27.6	35.4–37.0	21.3–21.7	29.9–30.3	65.0–66.1
42	35.4–37.0	22.0–22.4	27.6–29.1	37.0–38.6	22.0–22.4	30.7–31.1	66.5–67.7
44	37.0–38.6	22.8–23.2	29.1–30.7	38.6–40.2	22.8–23.2	31.5–31.9	68.1–69.3
46	38.6–40.2	23.6–24.0	30.7–32.3	40.2–41.7	23.6–24.0	32.3–32.7	69.7–70.9
48	40.2–41.7	24.4–24.8	32.3–33.9	41.7–43.3	24.4–24.8	33.1–33.5	71.3–72.4
50	41.7–43.3	24.4–24.8	33.9–35.4	43.3–44.9	25.2–25.6	33.1–33.5	71.3–72.4

Women’s Textile Pant Sizing

Alpha	Numeric	Waist (in)	Hips (in)	Thigh (in)	Inseam (in)	Height (in)
XS	22	22.8–25.2	32.3–34.6	19.7–20.7	28.3–29.3	61.8–64.0
SM	24	25.2–27.6	34.6–37.0	20.7–21.7	29.3–30.3	64.0–66.1
MD	26	27.6–29.1	37.0–38.6	22.0–22.4	30.3–31.3	66.3–67.7
LG	28	29.1–30.9	38.6–40.4	22.8–23.4	31.5–32.1	67.9–69.5
XL	30	30.9–32.7	40.4–42.1	23.6–24.2	32.3–32.9	69.5–71.1
2XL	32	32.7–34.6	42.1–44.1	24.4–25.2	32.9–33.3	71.1–71.9
3XL	34	34.6–36.6	44.1–46.1	25.4–26.2	33.9–34.3	71.9–72.8
4XL	-	36.6–38.6	46.1–48.0	26.4–27.2	33.9–34.3	73.1–74.0

Women’s Leather Pant Sizing

Size	Waist (in)	Hips (in)	Thigh (in)	Inseam (in)	Height (in)
38	24.4–26.0	33.9–35.4	20.5–20.9	29.1–29.5	63.4–64.6
40	26.0–27.6	35.4–37.0	21.3–21.7	30.3–31.1	65.0–66.1
42	27.6–29.1	37.0–38.6	22.0–22.4	30.7–31.1	66.5–67.7
44	29.1–30.7	37.8–40.2	22.8–23.2	31.5–31.9	68.1–69.3
46	30.7–32.3	40.2–41.7	23.6–24.0	32.3–32.7	69.7–70.9
48	32.3–33.9	41.7–43.3	24.4–24.8	33.1–33.5	71.3–72.4
50	33.9–35.4	43.3–44.9	25.2–25.6	33.1–33.5	71.3–72.4
52	35.4–37.0	44.9–46.5	26.0–26.4	33.9–34.3	72.8–74.0
54	37.0–38.6	46.5–48.0	26.8–27.2	33.9–34.3	72.8–74.0

Women’s Riding Jeans Sizing

Size	Waist (in)	Hips (in)	Thigh (in)	Inseam (in)
24	25.8–26.4	35.0–35.8	20.3–20.7	29.3–29.7
26	26.4–27.4	35.8–36.6	20.9–21.3	29.9–30.1
27	27.4–28.3	36.6–37.4	21.5–21.9	30.3–30.5
28	28.3–29.3	37.4–38.2	22.0–22.4	30.7–30.9
29	29.3–30.3	38.2–39.0	22.6–23.0	31.1–31.3
30	30.3–31.3	39.0–39.8	23.2–23.6	31.5–31.7
31	31.3–32.3	39.8–40.7	23.8–24.2	31.9–32.1
32	32.3–33.3	40.7–41.7	24.4–24.8	32.3–32.5
34	33.3–35.2	41.7–43.7	25.2–25.6	32.7–33.1

Footwear Size Guide

Men’s Performance Boots

EU Size	US Size
36	3.5
37	4
38	5
39	6
40	6.5
41	7.5
42	8
43	9
44	9.5
45	10.5
46	11.5
47	12
48	12.5
49	13.5
50	14

Men’s Touring Boots

EU Size	US Size
36	3.5
37	4
38	5
39	6
40	6.5
41	7.5
42	8
43	9
44	9.5
45	10.5
46	11.5
47	12
48	12.5
49	13.5
50	14

Men’s Riding Shoe / Casual Footwear

EU Size	US Size
37	5
37.5	5.5
38	6
38.5	6.5
39	7
40	7.5
40.5	8
41	8.5
42	9
42.5	9.5
43	10
43.5	10.5
44	11
45	11.5
45.5	12
46	12.5
47	13
47.5	13.5
48	14

Men’s MX / Offroad Boots

US Size	EU Size
5	38
6	39
7	40.5
8	42
9	43
10	44.5
11	45.5
12	47
13	48
14	49.5
15	51
16	52

Women’s Riding Shoes

EU Size	US Size
36	5
37	5.5
37.5	6
38	6.5
38.5	7
39	7.5
40	8
40.5	8.5
41	9
42	9.5
42.5	10
43	10.5
43.5	11
44	11.5

MEN'S MX APPAREL

Men’s MX Jersey Sizing

Size	A. Chest (in)	B. Waist (in)	F. Arm (in)
XS	30.7–32.9	24.8–27.2	19.3–20.1
SM	32.9–35.0	27.2–29.5	20.3–21.1
MD	35.0–37.2	29.5–31.9	21.5–22.2
LG	37.2–39.4	31.9–34.3	22.6–23.2
XL	39.4–41.5	34.3–36.2	23.6–24.4
2XL	41.5–43.7	36.2–38.2	24.8–25.6
3XL	43.7–45.9	38.2–40.2	26.0–26.8
4XL	45.9–48.0	40.2–42.1	26.0–26.8

Men’s MX Pant Sizing

Size	B. Waist (in)	C. Hips (in)	D. Thigh (in)	E. Inseam (in)	G. Height (in)
26	24.8–27.2	31.1–33.3	18.9–19.9	28.0–28.7	61.8–63.8
28	27.2–29.5	33.3–35.4	19.9–20.9	29.1–29.9	64.2–66.1
30	29.5–31.9	35.4–37.6	20.9–21.9	30.3–31.1	66.5–68.5
32	31.9–34.3	38.0–39.8	21.9–22.8	31.5–32.3	68.9–70.5
34	34.3–36.2	39.8–41.9	22.8–23.8	32.7–33.5	70.9–72.4
36	36.2–38.2	41.9–44.1	23.8–24.8	33.9–34.6	72.8–74.4
38	38.2–40.2	44.1–46.3	24.8–25.8	35.0–35.8	74.8–76.4
40	40.2–42.1	46.3–48.4	25.8–26.8	35.0–35.8	74.8–76.4
42	42.1–44.1	48.4–50.6	26.8–27.8	35.8–36.2	76.8–78.3
44	44.1–46.1	50.6–52.8	27.8–28.7	35.8–36.2	76.8–78.3

WOMEN'S MX APPAREL

Women’s Jersey Sizing

Size	A. Chest (in)	B. Bust (in)	C. Waist (in)
XS	29.1–31.5	30.7–33.1	22.8–25.2
SM	31.5–33.9	33.1–35.4	25.2–27.6
MD	33.9–35.4	35.4–37.0	27.6–29.1
LG	35.4–37.2	37.0–38.8	29.1–30.9
XL	37.2–39.0	38.8–40.6	30.9–32.7
2XL	39.0–40.9	40.6–42.5	32.7–34.6

Women’s Textile Pant Sizing

Alpha	Numeric	C. Waist (in)	D. Hips (in)	E. Thigh (in)	F. Inseam (in)	H. Height (in)
XS	22	22.8–25.2	32.3–34.6	19.7–20.7	28.3–29.3	61.8–64.0
SM	24	25.2–27.6	34.6–37.0	20.7–21.7	29.3–30.3	64.0–66.1
MD	26	27.6–29.1	37.0–38.6	22.0–22.4	30.3–31.3	66.3–67.7
LG	28	29.1–30.9	38.6–40.4	22.8–23.4	31.5–32.1	67.9–69.5
XL	30	30.9–32.7	40.4–42.1	23.6–24.2	32.3–32.9	69.5–71.1
2XL	32	32.7–34.6	42.1–44.1	24.4–25.2	32.9–33.3	71.1–71.9
3XL	34	34.6–36.6	44.1–46.1	25.4–26.2	33.9–34.3	71.9–72.8
4XL	-	36.6–38.6	46.1–48.0	26.4–27.2	33.9–34.3	73.1–74.0

YOUTH MX APPAREL

Youth Jersey Sizing

Size	Chest (in)	Waist (in)
Youth 2XS	21.9–22.8	19.7–20.5
Youth XS	22.8–23.8	20.5–21.3
Youth SM	23.8–25.8	21.3–22.8
Youth MD	25.8–27.8	22.8–24.4
Youth LG	27.8–29.7	24.4–26.0
Youth XL	29.7–31.7	26.0–27.6

Youth Pant Sizing

Alpha Size	US Size	Waist (in)	Hip (in)	Inseam (in)
Youth 2XS	Youth 18	19.7–20.5	25.2–26.0	15.9–18.1
Youth XS	Youth 20	20.5–21.3	26.0–26.8	18.1–20.3
Youth SM	Youth 22	21.3–22.8	26.8–28.3	20.3–22.2
Youth MD	Youth 24	22.8–24.4	28.3–29.9	22.2–24.2
Youth LG	Youth 26	24.4–26.0	29.9–31.5	24.2–26.2
Youth XL	Youth 28	26.0–27.6	31.5–33.1	26.2–28.1

Youth Chest Protector Sizing

Size	Chest (in)	Waist (in)	Hip (in)
Youth SM/MD	23.8–27.8	21.3–24.4	26.8–29.9
Youth LG/XL	27.8–31.7	24.4–27.6	29.9–33.1

Youth Glove Sizing

Size	Hand Circumference (in)
Youth 3XS	4.5–5.0
Youth 2XS	5.0–5.5
Youth XS	5.5–6.0
Youth SM	6.0–6.5
Youth MD	6.5–7.0
Youth LG	7.0–7.5

Free Shipping over $75
Free Returns Within 45 days

Product Details

Features

All the pro-level safety and performance features with fiberglass construction (versus the Supertech M10's carbon fiber shell)
A performance dirt helmet that maintains creature comforts like speaker cutouts and compatibility with hydration systems
Alpinestars revised Plasma energy-absorbing technology
Smooth, signature Alpinestars styling from top to bottom
Massive eyeport and fantastic ventilation
Multi-layer shell is constructed from a blend of fiberglass, carbon, and Aramid fiber
Energy-deflecting curved design is engineered to reduce friction and deflect impact forces away from the head
3 shell sizes: XS-MD, LG, XL-2XL
Integrated channels on both sides to accommodate a hydration system
Engineered to automatically detach from the shell when it is subjected to an impact energy greater than 15 Joules for optimum impact protection, regardless of the direction
20 individual intake and exhaust ports, 13 intakes and 7 exhausts for optimum ventilation
Patented A-Head Fitment System allows easy adjustment of the angle and height that the helmet sits on the head for an optimized performance fit
3D foam for optimum comfort, the lining features an anti-microbial treatment for long-lasting freshness
Replacement cheek pads are available in all thicknesses and exchangeable between all shell sizes for a customized fit
Specific rotational impact protection is provided by the combination of the internal shape and specific coating of the EPS liner, coupled to specially-developed surface in the comfort liner
Patented Plasma technology in side pads provide high performance shock absorption
Helmet designed to accommodate the installation of an eject removal system, which includes a removable insert on top of the EPS
Profiled chin bar for proven impact protection

Sizing Info

Payment & Security

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Alpinestars 2026 SM7 Cast Helmet

$519.95

$519.95 ~~$0.00~~

Free Shipping

All orders over $75 are delivered to your doorstep at no extra charge.

Explore Now

45-Days Free Returns

Enjoy the freedom of stress-free shopping with our hassle-free and return policy.

Return Policy

Secure Payment

Shop with confidence knowing your payments are secure and your information

More About Payment

Two individuals in motocross gear working on a bike with text 'Rider Support Center' overlayed.

Discover more in our Rider Support Center

How do I cancel or edit an order?

Because we aim to get your items to you as fast as possible, our system processes orders almost immediately. If you need to change or cancel an order, please contact us right away. We can cancel or edit any order that has not yet been processed. However, once an order moves into the fulfillment stage, we are unable to make further changes.

How can I track my order?

You can track your order by checking the shipping confirmation email, which contains a tracking number and a link to the courier's website. Alternatively, log in to your account on our website, navigate to "My Orders," and click on the tracking link provided for your order.

What is your return policy

We offer a 45-day return policy for most products. Items must be in their original condition, unused, and with all packaging intact. Please refer to our Returns Policy page for more details on eligible products.

Why are some items heavily discounted

Many deals are last-season colors, overstock inventory, or discontinued models — not lower quality gear.

This is one of the smartest ways to score premium protection at a reduced price.

Product Details

Features

Sizing Info

Alpinestars 2026 SM7 Cast Helmet