ION Bike Helmets & Protection

Frequently Asked Questions

• How do I choose between an ION standard MTB helmet and an ION full-face helmet?

  Choose based on activity and risk: ION standard MTB helmets (with extended rear coverage and removable visors) suit trail and enduro riding where ventilation and pedaling matter, while ION full-face helmets are built for high-speed downhill and aggressive runs where face and jaw protection is critical. Consider ventilation, weight, and whether the helmet meets downhill-specific standards (e.g., ASTM F1952) if you race or ride lift-access terrain. Try both with your goggles and pads to confirm comfort and sightlines before buying.
• What does MIPS do in ION helmets and should I prioritize it?

  MIPS (Multi-directional Impact Protection System) is a low-friction liner that allows about 10–15 mm of relative motion between the head and helmet shell to reduce rotational forces in oblique impacts. For aggressive MTB and downhill riding where rotational impacts are more likely, choosing an ION model with MIPS can meaningfully reduce risk compared with non-MIPS designs. MIPS is one part of protection—pair it with a well-fitting EPS/polycarbonate helmet and good coverage.
• How should I size and fit an ION MTB helmet for trail and downhill riding?

  Measure head circumference and use ION’s sizing chart, then fine-tune fit with the retention system so the helmet sits level, snug, and doesn’t move when you shake your head; a properly fitted helmet overrides small differences in listed specs. For full-face ION helmets, check cheek-pad contact, chinstrap comfort, and goggle clearance; for open-face MTB helmets, confirm rear coverage and visor fit while wearing goggles. Always fasten the chinstrap and perform a roll test to ensure stability.
• How do I care for an ION helmet and when should I replace it after a crash or with age?

  Clean pads and liners with mild soap and water, avoid solvents and high heat, and store the helmet out of direct sunlight to preserve foam and straps. Replace the helmet immediately after any significant impact—EPS foam can be damaged invisibly and is not reusable—and follow the manufacturer’s recommended service life (commonly around 3–5 years depending on use and exposure). Regularly inspect shells, straps, and buckles for cracks, deep dents, or weakened webbing and replace if you find damage.