You are using a web browser we don't support. Please use the latest version of one of these browsers.

Mozilla Firefox

Google Chrome

Apple Safari

Microsoft IE

Back to top

Bell Influx Bike Helmet


This product is no longer available, but don't go just yet.


  • Fusion process integrates the liner and microshell into single structure for lightweight strength and superior protection from sudden impacts
  • GPS (Geared Positioning System) offers the ultimate ease of one-hand suspension adjustment for a superior fit
  • Cam-lock levers on the side straps offer quick adjustment for a fine-tuned fit
  • A massive 18 vents channel cooling airflow across your cranium
  • Removable visor blocks sun and other elements, or can be removed for a streamlined look
  • Micro-denier sealed-edge fit pads wick moisture away from you and dry quickly to keep you comfortable when the sweat starts to roll
  • Meets or exceeds U.S. CPSC standards for bicycle helmets


View all Bell Mountain Bike Helmets

REI membership

Manuals and instructions



Best Use Mountain biking
Helmet style Mountain
Head circumference 20 -21.75 / 21.75 - 23.25 / 23.25 - 24.75 inches
Vents 18
Visor Yes
Weight 309 grams
Gender Unisex

The REI Difference

100% satisfaction guaranteed

We stand behind everything we sell. If you are not satisfied with your REI purchase, you can return it for a replacement or refund within one year of purchase.

REI's guarantee doesn't cover ordinary wear and tear or damage caused by improper use or accidents.

If your item has a manufacturing defect in its materials or workmanship, you can return it at any time. See our limited warranty.

Gear & advice you can trust

At REI, we live and breathe the outdoors, and we're passionate about sharing our expertise with people of all skill levels. Whether you're new to the outdoors or a seasoned explorer, we'll take the time to understand your needs and help you find the right gear for you.

10% annual member refund

Anyone can shop at REI, but for a one-time $20 fee you can become an REI member and enjoy a lifetime of benefits. These include an annual member refund, typically 10% back on eligible purchases.*




*10% is typical but not guaranteed. Your refund is based on eligible purchases, which exclude REI gift cards, services, fees, REI Adventures trips,, and discounted items. Learn more