Is the Alpinestars S-M5 street legal?

Yes. It is DOT certified for US road use and ECE certified for Europe, so it is legal for both street and off-road riding.

Does the S-M5 have MIPS?

No. The S-M5 uses a multi-density EPS liner but does not include MIPS or another rotational-impact system.

What sizes does it come in?

It comes in a range of adult sizes; the listed size is Medium. Check Alpinestars' size chart, since cheek pads run snug when new.

Can I wash the liner?

Yes. The comfort liner and cheek pads are removable and washable.

Is $239.99 a good price?

It is at the low end of the S-M5's recent range. Three stores price it new, so compare before buying.

Most standard motocross goggles fit, but some large-frame models are reported to fit tightly in the eye port.

Where is the Alpinestars S-M5 Helmet cheapest?

At 24mx.com, for $239.99, as of our latest check.

What do buyers say about the Alpinestars S-M5 Helmet?

Rated 4.6 out of 5 from 393 ratings.

Where can I buy the Alpinestars S-M5 Helmet?

4 stores we checked sell it, including Powersport Junkies, 24mx.com, MotoSport.com, eBay.

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Deal.ai › Alpinestars

Alpinestars

Alpinestars S-M5 Helmet

4.6(393 ratings)

Best price now

$239.99at 24mx.comObserved at 12:11 PM

Compared across 3 stores. Prices are checked against each store and labelled with when.

Visit 24mx.com

Deal.ai › Alpinestars

Alpinestars

Alpinestars S-M5 Helmet

4.6(393 ratings)

Best price now

$239.99at 24mx.comObserved at 12:11 PM

Compared across 3 stores. Prices are checked against each store and labelled with when.

Visit 24mx.com

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Our take on the Alpinestars S-M5 Helmet

The S-M5 is Alpinestars' mid-range full-face off-road helmet, aimed at motocross and trail riders. It carries both DOT and ECE certification, so it is legal for road and trail use in the US and Europe. The shell uses a multi-density EPS liner and a removable, washable comfort liner, and the visor is adjustable without tools. At $239.99 at 24mx.com as of November 6, 2026, it sits at the low end of its recent range, with three stores pricing it new.

Best forMotocross and trail ridersRiders who want DOT and ECE in one helmetBuyers stepping up from a budget lidUnisex fit, medium head sizes

Pros

DOT and ECE certified for road and trail use
Removable, washable liner keeps the fit fresh
Tool-free adjustable visor
Lightweight shell for its price class
Strong 4.6 out of 5 from 393 ratings

Cons

No MIPS or rotational-impact liner at this price
Goggle fit can be tight with some large-frame goggles
Ventilation is adequate rather than generous
Cheek pads run snug when new

Alpinestars S-M5 Helmet prices at every store

24mx.comNew
In stock
$239.99Observed at 12:11 PM
Visit store
MotoSport.comNew
In stock
$299.95Observed at 12:11 PM
Visit store
Powersport JunkiesNew
Out of stock
$223.67Observed at 12:11 PM
Visit store

Also available at

eBayCheck price at eBay

Alpinestars S-M5 Helmet price history

Lowest price we've seen: $223.67 on Nov 6 at Powersport Junkies. Tracked across 4 stores since Nov 6.

What reviewers say

4.6 / 5393 ratings

Owners rate the S-M5 highly, with 4.6 out of 5 across 393 ratings. Most praise the fit, finish and value for a dual-certified off-road helmet. Complaints center on snug cheek pads and goggle fit.

What people mention

FitMixedMost riders find the fit comfortable, but several say the cheek pads are tight when new.
BuildPraisedOwners describe the shell and liner as solid and well finished for the price.
GogglesCriticisedA few riders report that large-frame goggles fit poorly in the eye port.
VentilationMixedAirflow is called adequate, though some want more on hot days.
ValuePraisedBuyers see dual DOT and ECE certification at this price as strong value.

Specifications

Style: Full Face, Off-road
Department: Men's / Unisex
DOT Certified: Yes
ECE Certified: Yes
Use: Motorcycle
Size: Medium

Questions and answers

Is the Alpinestars S-M5 street legal?: Yes. It is DOT certified for US road use and ECE certified for Europe, so it is legal for both street and off-road riding.
Does the S-M5 have MIPS?: No. The S-M5 uses a multi-density EPS liner but does not include MIPS or another rotational-impact system.
What sizes does it come in?: It comes in a range of adult sizes; the listed size is Medium. Check Alpinestars' size chart, since cheek pads run snug when new.
Can I wash the liner?: Yes. The comfort liner and cheek pads are removable and washable.
Is $239.99 a good price?: It is at the low end of the S-M5's recent range. Three stores price it new, so compare before buying.
Will my goggles fit?: Most standard motocross goggles fit, but some large-frame models are reported to fit tightly in the eye port.
Where is the Alpinestars S-M5 Helmet cheapest?: At 24mx.com, for $239.99, as of our latest check.
What do buyers say about the Alpinestars S-M5 Helmet?: Rated 4.6 out of 5 from 393 ratings.
Where can I buy the Alpinestars S-M5 Helmet?: 4 stores we checked sell it, including Powersport Junkies, 24mx.com, MotoSport.com, eBay.