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2020 509 – Altitude Carbon Fiber Helmet

SKU: F01000500

$399.95 - $409.95

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The 509 Altitude Carbon Fiber Helmet packs industry-leading comfort and performance into a superlight and low-profile design.

One of the bestselling helmets ever, the 509 Altitude series excels across four key principles: safety, performance, fit, and style. Revolutionary design means precision fit and sleek profiling that exceeds the competition, plus innovative venting and all-day comfort for aggressive riding. The 509 Altitude Carbon Fiber Helmet is superlight with an industry-leading 100% carbon fiber construction and the easy-to-use Fidlock® magnetic buckle for glove-friendly one-handed operation.

  • Comes standard with universal camera mount
  • Comes standard with Fidlock® easy-open magnetic strap claspInnovative aerodynamic channels & 8 intake/exhaust vent ports
  • 8 sizes across 3 outer shell molds ensure excellent fitMeets and exceeds DOT & ECE 2205 safety certification
  • DOT/ECE helmet weight from 1230 grams

Helmets

XS S M L XL 2XL 3XL
Hat Size 6 1/8 - 6 3/4 6 7/8 - 7 7 1/8 - 7 1/4 7 3/8 - 7 1/2 7 6/8 - 7 3/4 7 7/8 - 8 8 1/2 - 8 1/4
Head (cm) 53-54 55-56 57-58 59-60 61-62 63-64 65-66
Head (inches) 20 7/8 - 21 1/4 21 1/4 - 22 22 1/8 - 22 3/4 23 1/8 - 23 1/4 24 - 24 7/8 24 3/4 - 25 1/8 25 1/2 - 25 1/8

Junior Helmet

Size S M L
Hat Size 6 1/8 - 6 1/4 6 3/8 - 6 1/2 6 5/8 - 6 3/4
Head (cm) 49-50 51-52 53-54
Head (inches) 19 1/4 - 19 3/4 20 - 20 1/2 20 7/8 - 21 1/8

How to measure

  • For best results, have someone else take measurements.
  • Measure body in underwear.
  • Tape must be snug but not tight.
  • If measurements fall between two sizes, order the larger size.

Height

Without shoes, standing with heels and back against a wall.

Chest

Measure under your arm, around the fullest part of your chest.

Waist

Immediately below the lowest rib.

Hips

Across the fullest part of the seat.

Arm Length

Hand on hip, from center back neck bone, along shoulder point, around elbow to bottom of wrist bone.

Inseam

Without shoes, from crotch to the floor.

Head

Around your head, from the center of the forehead, above the ears and over the natural bump at the back of the head.

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