509 Customer Service

509 Helmet Shell Sizes and Compatible Cheek Pads/Liners

509 helmets come in various shell sizes, and each size can be fine-tuned with different cheek pads and liners to ensure a perfect fit. Here’s a detailed overview:

Shell Sizes

509 helmets typically come in the following shell sizes:

• X-Small (XS)
• Small (SM)
• Medium (MD)
• Large (LG)
• X-Large (XL)
• 2X-Large (2XL)
• 3X-Large (3XL)
• 4X-Large (4XL)

Cheek Pads and Liners

Cheek pads and liners are interchangeable within certain shell size ranges, allowing you to customize the fit. Here’s how they generally work:

• Altitude and Altitude Carbon Helmets:

  • XS Shell: Can use SM cheek pads for a tighter fit.
  • SM Shell: Can use MD cheek pads for a looser fit.
  • MD Shell: Can use SM cheek pads for a tighter fit.
  • LG Shell: Can use MD cheek pads for a looser fit.
  • XL Shell: Can use 2XL cheek pads for a looser fit.
  • 2XL Shell: Can use XL cheek pads for a tighter fit¹.

• Tactical Helmets:

  • XS-MD Shell: Cheek pads are interchangeable within this range.
  • LG-2XL Shell: Cheek pads are interchangeable within this range².

How to Choose the Right Fit

1. Measure Your Head: Use a flexible tape measure to measure the circumference of your head just above your ears and eyebrows.
2. Try Different Pads: If your helmet feels too tight or too loose, try different cheek pads within your shell size range to adjust the fit.
3. Check for Pressure Points: Wear the helmet for 30-45 minutes to check for any pressure points. Adjust the pads if necessary.

Additional Tips

• Break-In Period: Helmets and cheek pads will slightly pack out over time, so a snug fit initially is ideal.
• Consult the Size Guide: Refer to the 509 Helmet Size Guide for detailed sizing information.

If you have any more questions or need further assistance, feel free to ask!