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HJC FG-X Grand Duke Helmets
Comparable Retail: $199.99
Our Price: $179.99
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Information and Details about the HJC FG-X Grand Duke Helmets
made by HJC
Advanced Fiberglass Composite Shell with Kevlar Reinforcement
  • Lightweight, superior fit and comfort using advanced CAD technology
  • Impact absorbing, multi-density EPS liner
  • Maximum range adjustable visor

    Large Eye Port
  • Maximum visibility and superior goggle fit

    ACS Advanced Channeling Ventilation System
  • Multi-Stage top and forehead intake vents combine with rear exit vents to provide flow-through ventilation that helps to pull heat and humidity up and out of the helmet’s interior

    SilverCool™ Interior Lining
  • SilverCool™ Moisture-wicking and odor-free interior with advanced silver antibacterial fabric
  • Crown and cheek pads are removable and washable

    Nylon Strap Double D-Ring Retention System
  • Neatly secures chin strap
  • Removable, washable

  • Soft Helmet Storage Bag Included

    FG-X TECHNICAL INFORMATION
  • Standards: DOT-218 / Snell-M2010
  • Construction: Fiberglass with Kevlar Reinforcement
  • Weight: XS to MD 3.19 lbs (1,450 +/- 50g) LG to 2XL 3.30 lbs. (1,500 +/- 50g)
  • Packaging: Individually wrapped, bagged and boxed, 6 per master carton

    Our Thoughts
    The HJC FG-X Helmet features an Advanced Fiberglass Composite Shell that is lightweight, comfortable and has a superior fit with a large eye port for maximum visibility and a great goggle fit. The Advanced Channeling Ventilation System makes for full front to back airflow that flushes heat and humidity up and out. The HJC FG-X Helmet also features a removable, moisture-wicking and odor-free interior with advanced silver anti-bacterial fabric.


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    Sizing Chart & Specs for the HJC FG-X Grand Duke Helmets

    HJC Helmet Standard Sizes
    SizeCentimetersInchesHat Size
    Childs S/M50 - 52cm19 3/4 - 20 1/8"6 1/4 - 6 1/2
    Childs L/XL53 - 54cm20 1/4 - 21 1/4"6 5/8 - 6 3/4
    XXX Small49 - 50cm19 1/4 - 19 3/4"6 1/8 - 6 1/4
    XX Small51 - 52cm20 - 20 1/2" 6 3/8 - 6 1/2
    X Small53 - 54cm20 7/8 - 21 1/4"6 5/8 - 6 3/4
    Small55 - 56cm21 3/8 - 22" 6 7/8 - 7
    Medium57 - 58cm22 1/4 - 22 7/8"7 1/8 - 7 1/4
    Large59 - 60cm23 1/4 - 23 5/8"7 3/8 - 7 1/2
    X Large61 - 62cm24 - 24 1/2" 7 5/8 - 7 3/4
    XX Large63 - 64cm24 3/4 - 25 1/4"7 7/8 - 8
    XXX Large65 - 66cm25 5/8 - 26" 8 1/8 - 8 1/4

    RPHA Series, FG-Jet, FG-17 Helmet Size Chart
    SizeCentimetersInchesHat Size
    X Small54 - 55cm21 1/4 - 21 5/8"6 3/4 - 6 7/8
    Small55 - 56cm21 8/8 - 22" 6 7/8 - 7
    Medium57 - 58cm22 1/2 - 22 7/8"7 1/8 - 7 1/4
    Large58 - 59cm22 7/8 - 23 1/4"7 1/4 - 7 3/8
    X Large60 - 61cm23 5/8 - 24" 7 1/2 - 7 5/8
    XX Large62 - 63cm24 3/8 - 24 3/4"7 3/4 - 7 7/8
    XXX Large64 - 65cm25 1/4 - 25 5/8" 8 - 8 1/8 1/4



    The sizing information is provided by the manufacturer and does not guarantee a perfect fit. However, we are happy to assist you with any needed exchanges.

    Note: the RPHA-Max seems to run a little smaller due to the thick padding and smaller overall shell design. Most size exchanges have been to up a size. So if you are on the fence. We recommend thinking about going up a size to start. However, please keep in mind the padding will break in some and a helmet that is a little tight vs. too loose for safety.
    Part Number Status for HJC FG-X Grand Duke Helmets
    Options SKU Comparable Retail Our Price Availability
    X-Small HJ-DUKE-XS $199.99 $179.99 Usually Ships in 1-3 Business Days
    Small HJ-DUKE-S $199.99 $179.99 Usually Ships in 1-3 Business Days
    Medium HJ-DUKE-M $199.99 $179.99 Usually Ships in 1-3 Business Days
    Large HJ-DUKE-L $199.99 $179.99 Usually Ships in 1-3 Business Days
    X-Large HJ-DUKE-XL $199.99 $179.99 Usually Ships in 1-3 Business Days
    2X-Large HJ-DUKE-2X $204.99 $184.99 Currently Not Available for Order


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    HJC FG-X Grand Duke Helmets  - Hi-Viz Yellow Orange
    Hi-Viz Yellow Orange
    HJC FG-X Grand Duke Helmets  - Hi-Viz Yellow Orange Top
    Hi-Viz Yellow Orange Top
    HJC FG-X Grand Duke Helmets  - Hi-Viz Yellow Orange Rear
    Hi-Viz Yellow Orange Rear