Illustrative image—not the exact model.
Fox Racing Speedframe Pro
By Jack Rydell
The Fox Speedframe Pro is a mountain-bike helmet.
Who should consider it
Mountain-bike riders considering Fox’s style 33506 Speedframe Pro with BOA adjustment, Mips Air Node and Fidlock fastening.
Features and trade-offs
Fox’s style 33506 listing identifies an open-face mountain-bike design with Mips Air Node, BOA fit adjustment and Fidlock fastening. Different Speedframe Pro generations have different equipment.
This is an open-face bicycle helmet. It belongs in a bicycle shortlist; motorcycle approval and full-face coverage should not be inferred from its appearance.
What to check at a fitting
Adjust the BOA system using Fox’s instructions, then check stability with your usual cycling eyewear. Practise the Fidlock closure and inspect strap routing.
Start with the manufacturer’s size chart and keep the helmet on long enough to identify pressure points. Follow the model’s fitting instructions and repeat the retention checks after any approved adjustment. Record the size and padding configuration that works for you.
Two alternatives to try
- Fox Speedframe, style 26840: another open-face MTB option, with Fox’s 360° Fit System rather than assuming the Pro’s adjustment equipment.
- Fox Proframe, style 31469: a full-face trail option to try if your shortlist calls for a chin bar.
Sources
Fox Racing Speedframe Pro — manufacturer specifications
Alternative model references: Fox Speedframe 26840; Fox Proframe 31469.
This is a documentation-based buying guide. Fit, noise and comfort have not been scored from hands-on testing.
Helmet specifications
Bicycle helmet — excluded from motorcycle comparisons.
Manufacturer specifications awaiting verification.
Certifications are not comparative safety scores. Check the label on the exact helmet; production versions and market approvals can differ.
