What size bike and wheels are allowed?

The 2026 BMX racing regulations recognise two bike styles: Standard 20 inch and Cruiser 24 inch.

• Standard 20 inch: wheels must not exceed 57 cm (22 1/2 inches) in diameter with the tyres inflated.
• Cruiser 24 inch: wheels must be at least 57 cm (22 1/2 inches) and no more than 66.05 cm (26 inches) in diameter with the tyres inflated.
• Axles: wheel axles may not protrude more than 5 mm beyond the hub nuts.
• Transponder: mounted on the front fork leg of the bike, and it may not protrude past the centre of the front hub axle.

A rider may enter one age category, one Cruiser category and one Junior Superclass or Superclass category at the same event.