Rider-matched picks
Size-matched helmets picks for competitive cyclists, with fit and feature priorities curated for how competitive cyclists actually ride.
Open the helmets calculatorRacing demands aggressive positioning that prioritizes aerodynamics and power transfer over pure comfort. This means a handlebar drop of 5-10cm below saddle height for optimal frontal area reduction, reach that allows a flat back with bent elbows at approximately 155-165 degrees, and precise saddle positioning with knee tracking directly over the pedal spindle at 3 o'clock. However, you must have the flexibility and core strength to sustain these positions — overreaching creates inefficiency, power loss, and injury. Most professional fitters use the 109% inseam method for saddle height and adjust reach based on shoulder flexibility tests. For criterium racing, consider slightly shorter reach for quick handling in tight corners. For time trials, a lower front end with aero extensions changes the fit equation entirely. If you're spending over $5,000 on a race bike, invest $200-350 in a professional Retül or Guru bike fit to optimize your position.
Measure head circumference at the widest point across the forehead. Most brands size: XS (50–53 cm), S (53–56 cm), M (56–59 cm), L (59–62 cm), XL (62+ cm). Kids helmets typically start at 47–50 cm. Always try before buying; fit varies by brand.
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Giro
S 51–55 cm, M 55–59 cm, L 59–63 cm
Bell
S 52–56 cm, M 56–60 cm, L 60–64 cm
Smith
S 51–55 cm, M 55–59 cm, L 59–63 cm
Poc
S 50–54 cm, M 54–58 cm, L 58–62 cm
Lazer
S 50–54 cm, M 54–58 cm, L 58–62 cm
Kask
S 50–54 cm, M 54–58 cm, L 58–62 cm
Troy Lee Designs
S 53–56 cm, M 56–59 cm, L 59–62 cm
Abus
S 52–58 cm, M 58–64 cm
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