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Equipped with pro-level technology but designed with the privateer in mind, the Bell 4Forty Air MIPS is the first choice for your next trail helmet.
The 4Forty Air MIPS is equipped with pro-level features yet designed with the privateer in mind. With a sleek new shell design and 3-position visor, the benefits aren’t just visibly rad but functionally significant for increased air ventilation, effective sweat management, and better goggle compatibility. Our Float Fit™ system, built-in Sweat Guide™, and anti-microbial Ionic+ padding ensures all-day comfort, while integrated MIPS and extended hard-shell coverage helps you stay committed in all shred conditions. Upgrades like eyewear ports, a Fidlock® magnetic buckle, and premium straps make the 4Forty Air MIPS your go-to for daily trail riding life.
IMPACT MANAGEMENT |
Integrated MIPS® |
CONSTRUCTION |
Fusion In-Mold Polycarbonate Shell |
VISOR |
3-Position Adjustable Visor |
FIT SYSTEM |
Float Fit™ with Fidlock® Buckle |
PRODUCT WEIGHT |
360g (Size M) |
CERTIFICATION |
CPSC Bicycle*, CE EN1078 |
Loading App Layer
The 4Forty Air MIPS is equipped with pro-level features yet designed with the privateer in mind. With a sleek new shell design and 3-position visor, the benefits aren’t just visibly rad but functionally significant for increased air ventilation, effective sweat management, and better goggle compatibility. Our Float Fit™ system, built-in Sweat Guide™, and anti-microbial Ionic+ padding ensures all-day comfort, while integrated MIPS and extended hard-shell coverage helps you stay committed in all shred conditions. Upgrades like eyewear ports, a Fidlock® magnetic buckle, and premium straps make the 4Forty Air MIPS your go-to for daily trail riding life.
Bell colour:black colour:blue colour:green- colour:grey colour:red colour:white colour:yellow discipline:mtb embargo:no features:mips gender:mens gender:womens helmet-size:l helmet-size:m helmet-size:s helmet-size:xl line-status:inline product-type:helmet season:my22 season:my23 season:my24 stylecode:beh4foam //bellbikehelmets.co.uk/cdn/shop/files/BEH4FOAM_51788_03.jpg?v=1695205573 //bellbikehelmets.co.uk/cdn/shop/files/BEH4FOAM_51785_03.jpg?v=1695205573 //bellbikehelmets.co.uk/cdn/shop/files/BEH4FOAM_51790_03.jpg?v=1695205573 //bellbikehelmets.co.uk/cdn/shop/files/BEH4FOAM_51787_03.jpg?v=1695205573 //bellbikehelmets.co.uk/cdn/shop/files/BEH4FOAM_51783_03.jpg?v=1695205610 //bellbikehelmets.co.uk/cdn/shop/files/BEH4FOAM_51784_03.jpg?v=1695205610 //bellbikehelmets.co.uk/cdn/shop/files/BEH4FOAM_63430.jpg?v=1701089713 47489078296875 Matte Dark Green/Orange / L 58-62cm 139.99 139.99 //bellbikehelmets.co.uk/cdn/shop/files/BEH4FOAM_63430.jpg?v=1701089713 https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=47489078296875 OutOfStock Matte Dark Green/Orange L 58-62cm 47489078329643 Matte Dark Green/Orange / M 55-59cm 139.99 139.99 //bellbikehelmets.co.uk/cdn/shop/files/BEH4FOAM_63430.jpg?v=1701089713 https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=47489078329643 OutOfStock Matte Dark Green/Orange M 55-59cm 47489078362411 Matte Dark Green/Orange / S 52-56cm 139.99 139.99 //bellbikehelmets.co.uk/cdn/shop/files/BEH4FOAM_63430.jpg?v=1701089713 https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=47489078362411 OutOfStock Matte Dark Green/Orange S 52-56cm 46030498201899 Matte/Gloss Grey/Black Fasthouse / L 58-62cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498201899 InStock Matte/Gloss Grey/Black Fasthouse L 58-62cm 46030498234667 Matte/Gloss Grey/Black Fasthouse / M 55-59cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498234667 InStock Matte/Gloss Grey/Black Fasthouse M 55-59cm 46030498267435 Matte/Gloss Grey/Black Fasthouse / S 52-56cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498267435 InStock Matte/Gloss Grey/Black Fasthouse S 52-56cm 46030498332971 Matte Light Grey/Nimbus / M 55-59cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498332971 InStock Matte Light Grey/Nimbus M 55-59cm 46030498365739 Matte Light Grey/Nimbus / S 52-56cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498365739 InStock Matte Light Grey/Nimbus S 52-56cm 46030498398507 Matte Blue/Hi-Viz / L 58-62cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498398507 InStock Matte Blue/Hi-Viz L 58-62cm 46030498431275 Matte Blue/Hi-Viz / M 55-59cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498431275 InStock Matte Blue/Hi-Viz M 55-59cm 46030498464043 Matte Blue/Hi-Viz / S 52-56cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498464043 InStock Matte Blue/Hi-Viz S 52-56cm 46030498496811 Matte White/Black / L 58-62cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498496811 InStock Matte White/Black L 58-62cm 46030498529579 Matte White/Black / M 55-59cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498529579 InStock Matte White/Black M 55-59cm 46030498562347 Matte White/Black / S 52-56cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498562347 InStock Matte White/Black S 52-56cm 46030498595115 Matte Grey/Red / L 58-62cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498595115 InStock Matte Grey/Red L 58-62cm 46030498627883 Matte Grey/Red / M 55-59cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498627883 InStock Matte Grey/Red M 55-59cm 46030498660651 Matte Grey/Red / S 52-56cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498660651 InStock Matte Grey/Red S 52-56cm 46030498693419 Matte Black / XL 61-65cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498693419 InStock Matte Black XL 61-65cm 46030498726187 Matte Black / L 58-62cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498726187 InStock Matte Black L 58-62cm 46030498758955 Matte Black / M 55-59cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498758955 InStock Matte Black M 55-59cm 46030498791723 Matte Black / S 52-56cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498791723 InStock Matte Black S 52-56cm 46030498824491 Matte Black Camo / L 58-62cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498824491 InStock Matte Black Camo L 58-62cm 46030498857259 Matte Black Camo / M 55-59cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498857259 InStock Matte Black Camo M 55-59cm 46030498890027 Matte Black Camo / S 52-56cm 97.99 139.99 //bellbikehelmets.co.uk/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif https://bellbikehelmets.co.uk/products/bell-4forty-air-mips-mtb-helmet?variant=46030498890027 InStock Matte Black Camo S 52-56cm