Helmets
For Fox helmets, measure around the widest part of your head, just above the eyebrows and ears. Keep the measuring tape level and snug without pulling it tight. If your measurement sits between two helmet sizes, Fox generally recommends choosing the larger size.
Speedframe / Speedframe Pro / Speedframe RS / Crossframe Pro
- S: 51 – 55 cm | approx. 20.1" – 21.7"
- M: 55 – 59 cm | approx. 21.7" – 23.2"
- L: 59 – 63 cm | approx. 23.2" – 24.8"
Youth Speedframe
- Youth / S: 51 – 55 cm | approx. 20.1" – 21.7"
Proframe
- S: 51 – 55 cm | approx. 20.1" – 21.7"
- M: 55 – 59 cm | approx. 21.7" – 23.2"
- L: 59 – 63 cm | approx. 23.2" – 24.8"
Proframe RS
- S: 51 – 55 cm | approx. 20.1" – 21.7"
- M: 55 – 59 cm | approx. 21.7" – 23.2"
- L: 59 – 63 cm | approx. 23.2" – 24.8"
Please Note: Proframe RS helmets include alternative cheek pads to help fine-tune the fit.
Youth Proframe
- Youth / One Size: 48 – 52 cm | approx. 18.9" – 20.5"
Please Note: Fox may give an approximate age range for youth helmets, but head circumference should always take priority over age.
Dropframe Pro — Current Generation
- S: 51 – 55 cm | approx. 20.1" – 21.7"
- M: 55 – 59 cm | approx. 21.7" – 23.2"
- L: 59 – 63 cm | approx. 23.2" – 24.8"
Dropframe Pro — Previous Generation / Dvide
- S: 52 – 54 cm | approx. 20.5" – 21.25"
- M: 54 – 56 cm | approx. 21.25" – 22"
- L: 56 – 58 cm | approx. 22" – 22.75"
- XL: 58 – 60 cm | approx. 22.75" – 23.5"
Please Note: Older Dropframe Pro helmets use a different size chart from the current generation, so check which model you have before choosing your size.
Rampage
- YS: 49 – 50 cm | approx. 19.3" – 19.7"
- YM: 51 – 52 cm | approx. 20.1" – 20.5"
- YL: 51 – 52 cm | approx. 20.1" – 20.5"
- XS: 53 – 54 cm | approx. 20.9" – 21.3"
- S: 55 – 56 cm | approx. 21.7" – 22.1"
- M: 57 – 58 cm | approx. 22.4" – 22.8"
- L: 59 – 60 cm | approx. 23.2" – 23.6"
- XL: 61 – 62 cm | approx. 24" – 24.4"
- XXL: 63 – 64 cm | approx. 24.8" – 25.2"
Please Note: Rampage is designed to fit more like a motorcycle-style full-face helmet, so it should feel more encompassing and snug than a standard open-face MTB helmet.
Rampage Pro Carbon
- S: 55 – 56 cm | approx. 21.75" – 22.25"
- M: 57 – 58 cm | approx. 22.25" – 23.25"
- L: 59 – 60 cm | approx. 23.25" – 23.75"
- XL: 61 – 62 cm | approx. 23.75" – 24.75"
Please Note: If you fall between Rampage Pro Carbon sizes, moving up to the larger size will generally provide the better fit.
Mainframe
- Youth: 48 – 52 cm | approx. 19" – 20.5"
- S: 51 – 55 cm | approx. 20" – 21.5"
- M: 55 – 59 cm | approx. 21.5" – 23"
- L: 59 – 63 cm | approx. 23" – 25"
Flight Helmet
- S: 53 – 54 cm | approx. 20.9" – 21.25"
- M: 55 – 56 cm | approx. 21.7" – 22"
- L: 57 – 58 cm | approx. 22.5" – 22.9"
Please Note
Fox uses several different fits across its MTB range. Ranger is generally the easiest standard fit, Defend provides more room for protection and aggressive riding, and Flexair has a slimmer, more performance-focused cut.
For helmets, always choose your size using an actual head circumference measurement rather than clothing size or age. A correctly fitted helmet should feel secure and snug without uncomfortable pressure points.