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Alpinestars SM3 Solid Helmet vs Alpinestars SM7 Helmet

Both are Alpinestars off-road helmets rated 4.8, but they sit at different levels. The SM7 is the step-up model: a fiberglass, carbon and Aramid composite shell, ECE 22.06, 20 vents, three shell sizes and the A-Head fitment system, at a slightly lower weight than the SM3. The SM3 is the simpler thermo-injected shell with rotational impact protection, DOT and ECE certification, and a broad size run including kids. Buy the SM7 for serious MX and enduro riding; buy the SM3 for casual dirt days and younger riders.

  • Choose the Alpinestars SM3 if you want a proven off-road helmet with rotational impact protection, DOT and ECE certification, and a kids option.
  • Choose the Alpinestars SM7 if you race or ride hard and want a lighter composite shell, ECE 22.06, more venting and a finer fit adjustment.

Prices

  • Alpinestars SM3 Solid Helmet: $229.00 at Amazon (last seen Nov 13)
  • Alpinestars SM7 Helmet: $359.99 at 24mx.com (last seen Nov 13)
  • Difference: the Alpinestars SM3 Solid Helmet is $130.99 cheaper than the Alpinestars SM7 Helmet at the latest prices (Nov 13)
Alpinestars
Alpinestars SM3 Solid Helmet

Alpinestars SM3 Solid Helmet

4.8(364 ratings)
$229.00at AmazonChecked Nov 13
See all prices and details
Visit Amazon

Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

Pros
  • Rotational impact protection is standard
  • DOT and ECE certified
  • Kids version available
  • Effective venting for trail and moto days
  • Wide size and graphic range
Cons
  • Heavier than the SM7
  • Older ECE standard
  • Fewer intake ports
  • Thermo-injected shell is less premium
Alpinestars
Alpinestars SM7

Alpinestars SM7 Helmet

Alpinestars SM7

4.8(50 ratings)
$359.99at 24mx.comChecked Nov 13
See all prices and details
Visit 24mx.com
Pros
  • Lighter composite shell
  • ECE 22.06 certification
  • 20 vents for hot race days
  • A-Head fitment adjusts angle and height
  • PLASMA collarbone padding
Cons
  • No rotational liner listed
  • No kids size
  • Fewer owner ratings so far
  • Race-focused fit suits dedicated riders best

What separates them

Alpinestars SM3 Solid HelmetAlpinestars SM7 Helmet
Shell materialThermo-injected polymer blend with varying thicknessFiberglass, carbon and Aramid fiber composite
Weight (ECE, medium)1310g1280g
HomologationDOT and ECEDOT and ECE 22.06
Ventilation10 inlets, 7 exhausts13 inlets, 7 exhausts
Rotational impact protectionPatented system reduces rotational accelerationCurved shell and PLASMA side pads; no rotational liner listed
Fit adjustmentSize-specific EPS and multiple shell sizesPatented A-Head system adjusts angle and height
Visor releasePatented release systemPatented release system rated over 15 Joules
Sizing and youthSmall and other sizes, kids version availableXS to XXL, adult only

Price history

  • Alpinestars SM3 Solid Helmet: lowest $229.00 on Nov 13 at Amazon.
  • Alpinestars SM7 Helmet: lowest $359.99 on Nov 13 at 24mx.com.

Prices at every store

Alpinestars SM3 Solid Helmet

  • A G Racing LimitedNew

    In stockShips from the UK · duties may applyReturn policy

    $203.00Checked Nov 13
    Visit A G Racing Limited
  • Dune GoonsNew

    In stockReturn policy

    $229.95Checked Nov 9
    Visit Dune Goons
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $229.00Free shippingChecked Nov 13
    Visit Amazon
  • AlpinestarsNew

    Availability unknownReturn policy

    $229.95Checked Nov 13
    Visit Alpinestars

Store links may earn us a commission.

All 4 stores and price history →

Alpinestars SM7 Helmet

  • 24mx.comNew

    In stock

    $359.99Checked Nov 13
    Visit 24mx.com
  • chromeburner.comNew

    In stock

    $365.84Checked Nov 13
    Visit chromeburner.com
  • Cycle GearNew

    In stock

    $459.95Checked Nov 13
    Visit Cycle Gear
  • MojoMotoSport.comNew

    In stock

    $459.95Checked Nov 13
    Visit MojoMotoSport.com
All 12 stores and price history →

Specs compared

SpecAlpinestars SM3 Solid HelmetAlpinestars SM7 Helmet
StyleOff-road—
DepartmentMen's / Unisex—
DOT CertifiedYes—
ECE CertifiedYes—
For KidsYes—
SizeSmall—
UseMotorcycle—
Weight (ECE)—1280g
Weight (DOT)—1340g
Shell sizes—3
Sizes—XS to XXL
Intake ports—13
Show all 19 specsShow fewer specs
SpecAlpinestars SM3 Solid HelmetAlpinestars SM7 Helmet
Exhaust ports—7
Total vents—20
Visor release energy—15 Joules
Homologation—ECE2206 and DOT
Shell material—fiberglass, carbon, and Aramid fiber
Certification—DOT and ECE 22.06
Model year—2026 Model

What reviewers say

Alpinestars SM3 Solid Helmet

  • 4.8 / 5364 ratings

Owners rate the SM3 highly, praising the light feel, the airflow and the secure fit. Complaints center on wind noise and the visor pulling at higher speeds.

What people mention
  • WeightPraisedRiders say it feels light for a certified off-road helmet, which helps on long motos.
  • VentilationPraisedOwners report the many inlets and exhausts move real air when riding hard.
  • FitPraisedThe size-specific EPS and multiple shell sizes give a close, secure fit for most riders.
  • NoiseCriticisedSeveral owners find it loud at speed compared with other helmets.

Alpinestars SM7 Helmet

  • 4.8 / 550 ratings

Riders rate the SM7 highly, at 4.8 out of 5 from 50 ratings, and praise its light weight, ventilation and secure fit. Complaints center on the fiddly Double-D strap and the price of stepping into this tier.

What people mention
  • WeightPraisedOwners say it feels light on long rides compared with heavier dirt helmets.
  • VentilationPraisedRiders report strong airflow through the intake and exhaust ports in hot conditions.
  • FitPraisedThe A-Head system lets riders tune the angle and height for a secure fit.
  • BuckleCriticised

Questions and answers

Which is better for motocross racing?
The SM7. Its composite shell is lighter, it meets ECE 22.06, and it has more intake ports for heat on long motos.
Does the SM3 have rotational impact protection and the SM7 not?
Alpinestars lists a patented rotational impact protection system on the SM3. The SM7 relies on its curved shell and PLASMA side pads instead.
Which lasts longer?
Both use replaceable liners and standard care. The SM7's composite shell resists dents better; the SM3's thermo-injected shell is simpler to repair and replace.
Can a kid wear either?
Only the SM3. Alpinestars offers it in youth sizing; the SM7 runs XS to XXL for adults.
Is the SM7 worth stepping up to?
Yes for regular racers: lighter weight, ECE 22.06 and better fit adjustment matter over a season. Casual trail riders can stay with the SM3.
Which fits rounder heads better?
The SM7's A-Head system lets you change the angle and height, so it adapts to more head shapes. The SM3 relies on size-specific EPS.

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The Double-D strap is seen as safe but slower to fasten and unfasten.