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LeattDBX 4.0 Helmet


Item # LBR00BV

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  • Black, S ($229.99)
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Item # LBR00BV

DBX 4.0 Helmet

The mountain bike protection specialists at Leatt are at it again with the DBX 4.0 Helmet, a lightweight and breathable full-face helmet designed to be more versatile for day to day riding or enduro racing. The DBX 4.0 is modeled after Leatt's downhill race helmets but has noticeably more material cut away in order to reduce weight and improve ventilation. This makes it much more enjoyable for the inevitable climbs that link up your favorite descents, or the long transfer stages found in enduro racing when wearing your helmet is often mandatory. The helmet is still downhill-certified, and you get Leatt's most current advanced protective features, giving you the peace of mind needed to test your limits on gravity trails that aren't always accessible by shuttle or chairlift.

The DBX 4.0 helmet features the advanced protection of Leatt's innovative 360-degree Turbine Technology. The design consists of 10 small rubber discs made of 3D-molded energy-absorbing material that are set into the helmet's impact foam. These turbine-shaped discs stiffen upon impact and deform as necessary to absorb both high and low-speed vertical impact forces, as well as rotational impact forces. Independent testing indicates this technology reduces up to 30% of head impact at concussion level and up to 40% of rotational acceleration to the head and brain.

The helmet's outer shell is mated in-mold to both EPS and EPO impact foam, giving you the superior energy absorption of dual-density foam while helping to keep the weight down. The closure system is a Fidlock magnetic buckle that allows a custom fit and is easy to open and close—even with gloves on. A unique feature we've seen only on the DBX 4.0 is the mouthpiece grill that can be removed for hotter rides with more pedaling, and then put back in when you want more protection from mud, dust, or bugs. Other features include a breakaway visor that adds another level of safety in the event of a crash, as well as a moisture-wicking, breathable, anti-odor padded liner that can be removed and washed.

  • A lightweight MTB full-face with advanced safety features
  • Well-suited to aggressive all-mountain and enduro riding
  • 22 vents for maximum breathability when pedaling
  • 360-degree Turbine Technology diffuses rotational energy
  • Dual-density impact foam for superior impact absorption
  • ASTM DH-certified for peace of mind on rowdy descents
  • Mouthpiece grill is removable for pedally rides on hot days
  • Fidlock magnetic buckle for easy on and off

Tech Specs
Shell MaterialPolymer Compound
Impact FoamEPS, EPO
Multiple Impact360-degree Turbine Technology
Ventilation22 vents
Fit Adjustmentadjustable chin strap
CertificationsAS/NZS 2063:2008, ASTM F1952-10, EN1078, CPSC 1203
Recommended Useenduro, downhill
Manufacturer Warrantylimited


Head Circumference

20.8 - 21.25in

(53 - 54cm)

21.6 - 22in

(55 - 56cm)

22.5 - 22.8in

(57 - 58cm)

23.3 - 23.7in

(59 - 60cm)

24 - 24.5in

(61 - 62cm)

24.8 - 25.2in

(63 - 64cm)

How to Measure:
Measure the circumference of your head with a tape measure. Place the tape measure slightly above the ear and bring it across the mid forehead completely circling the head about 1 inch above the eyebrows. Take several measurements to make sure you have the largest size. If you do not have a tape measure, use a string and measure it against a ruler.

What do you think about this product?


>Rating: 4

Knocked down but not out.

I've used it once or twice and have initial impressions
True to size
Size Bought
5` 8"
175 lbs

First evening using new Leatt DBX 4.0. Ate it hard on a switchback headed downhill. Really don't know how the accident occurred. All of a sudden I was OTB right into sharp rocks and earth, Face would have impacted earth if not for helmet. Last week I was using open face mountain bike helmet. Best ventilated FF helmet i have ever used or owned. You can tell good engineering and thought was put into the design. Hated to scratch and dent a brand spanking new helmet, but that is why you purchase them. Awesome helmet, but broke my hand during accident.

>Rating: 4

Does The Job

If you like both a full face and normal style helmet in your arsenal save yourself some money and buy one of these. Looks great, works great.

>Rating: 5

Very good

I've put it through the wringer

Been riding this helmet for about a month now and love it. Very comfortable and cooler than i expected. Pretty light and solid built. More protection than the fox airframe, but that's what i was looking for. The front grill that is removable is good and has plenty of room to spit out of and not make a mess. Had one small wreck where i faceplanted and it saved my chin. Oh, and the strap mechanism is clutch - no more D-rings!