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Deal.ai › Bell › Toys & Games
Bell
Bell 4Forty MIPS Adult Bike Helmet

Bell 4Forty MIPS Adult Bike Helmet

Best price now

$38.00at WalmartChecked 2 h ago

57% under what the other stores charge

Compared across 8 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $38.00 at Walmart (checked Nov 12, 2026).
  • Checked at 8 stores.

Our take on the Bell 4Forty MIPS Adult Bike Helmet

The Bell 4Forty MIPS is a trail mountain bike helmet with a full hard shell, extended rear coverage and MIPS Evolve rotational-impact protection. It uses Bell's Float Fit cradle and Sweat Guide padding, and has generous vents plus an adjustable visor. It suits trail and all-mountain riders who want a well-equipped helmet without stepping up to Bell's lighter, pricier models. Owners generally rate it comfortable and well ventilated for the money, though some find it warm on slow climbs and heavier than premium helmets.

Best forTrail and all-mountain ridersRiders wanting MIPS protection on a budgetHot-weather riding with lots of climbingBeginners and casual mountain bikers
Pros
  • MIPS Evolve rotational protection
  • Full hard shell with extended rear coverage
  • Generous ventilation
  • Float Fit adjustable cradle and Sweat Guide padding
  • Adjustable visor for sun and rain
Cons
  • Heavier than premium trail helmets
  • Can run warm on slow, technical climbs
  • Fit cradle is less refined than higher-end Bell models
  • Visor adjustment is basic

Bell 4Forty MIPS Adult Bike Helmet prices at every store

  • WalmartNew

    In stock

    $38.00Checked 2 h ago
    Visit Walmart
  • eBayNew

    In stock

    $75.00+ $10.00 shippingChecked 2 h ago
    Visit eBay
  • SteepandcheapNew

    In stock

    $87.99Checked 2 h ago
    Visit Steepandcheap
  • BackcountryNew

    In stock

    $87.99Free shippingChecked 2 h ago
    Visit Backcountry
  • Competitive CyclistNew

    In stock

    $87.99Free shippingChecked 2 h ago
    Visit Competitive Cyclist
  • Jenson USANew

    In stock

    $110.00Free shippingChecked 2 h ago
    Visit Jenson USA
  • AmazonNew

    Availability unknown

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

    $64.90Free shippingChecked 2 h ago
    Visit Amazon
  • Bell HelmetsNew

    Out of stock

    $87.98Free shippingChecked 2 h ago
    Visit Bell Helmets

Also available at

  • WalmartCheck price at Walmart

Store links may earn us a commission. Some prices via Klarna.

Bell 4Forty MIPS Adult Bike Helmet price history

Lowest price we've seen: $58.00 on Nov 13 at Walmart. Tracked across 8 stores since Nov 13.

What reviewers say

Owners describe the 4Forty MIPS as a comfortable, well-ventilated trail helmet that punches above its class. Many praise the coverage and fit, while a few call it warm and heavier than top-tier helmets.

What people mention
  • VentilationMixedRiders say airflow is good when moving but the helmet gets warm on slow, technical climbs.
  • FitPraisedThe Float Fit cradle is easy to adjust and most owners find the fit comfortable.
  • WeightMixedSome owners note it is heavier than premium trail helmets.
  • CoveragePraisedExtended rear coverage is a commonly cited plus for trail riding.
  • ValuePraisedOwners feel it offers features usually found on more expensive helmets.

About the Bell 4Forty MIPS Adult Bike Helmet

The Bell 4Forty MIPS is a mountain bike helmet for adults, built for trail riding. It has a full hard shell and extended rear coverage. Mips Evolve protection is built in.

Generous ventilation helps keep the head cool. Float Fit provides the fit and comfort, and a built-in Sweat Guide manages sweat. The visor is adjustable.

Type
Adult mountain bike helmet
Size
Small (52-56 cm)
Color
Black
Protection
Mips Evolve system, full hard shell, extended rear coverage
Fit
Float Fit
Comfort
Built-in Sweat Guide, generous ventilation
Visor
Adjustable

Specifications

size
Small (52-56 cm)Source
color
BlackSource

Questions and answers

Does the Bell 4Forty MIPS have rotational protection?
Yes. It uses MIPS Evolve, a low-friction layer designed to reduce rotational forces in angled impacts.
Is it good for trail riding?
Yes. The full hard shell, extended rear coverage and adjustable visor are aimed at trail and all-mountain use.
How does it compare with Bell's higher-end helmets?
It shares much of the coverage and fit of pricier Bell trail helmets but is heavier and uses a simpler fit cradle.
Can I adjust the fit?
Yes. The Float Fit cradle adjusts around the head, and the straps and visor are adjustable.
Is it ventilated enough for hot weather?
It has generous vents that work well when moving, though owners report it can feel warm on slow climbs.
What is included with the helmet?
The helmet comes with its fit padding and Sweat Guide liner as fitted; check the box contents for any extras.
Where is the Bell 4Forty MIPS Adult Bike Helmet cheapest?
At Walmart, for $38.00, 57% under what the other stores charge, as of our latest check.
Where can I buy the Bell 4Forty MIPS Adult Bike Helmet?
8 stores we checked sell it, including Steepandcheap, Backcountry, Competitive Cyclist, Walmart, Amazon.

Stores we've priced the Bell 4Forty MIPS Adult Bike Helmet at

  • Competitive Cyclist deals and prices
  • Jenson USA deals and prices
  • Walmart deals and prices

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