BMX

X-Park

Helmet: Full-face,with padding and chin guard

Wheels Diameter 50.8cm (20in)

Bike Equipped with single gear. Only rear brake required. Chain guard, kickstand and other bolted-on gear not permitted

COURSE Men Women

Length: 400m (men), 372m (women)

Banked corner

Track width: At least 10m at start, minimum 5m

London Olympics women’s individual gold medallist Mariana Pajón (COL)

Clothing: Gloves, knee and elbow pads, long-sleeved shirt and trousers

COMPETITION FORMAT

Field: 32 men, 16 women

Seeding phase Ensures fastest riders do not meet until final

Quarter-finals (men only) Held over three runs.
Top 16 progress 

Semi-finals: Three runs by two groups of eight
riders. Top four from each group progress

Final: Single deciding run

Start ramp Height 8m

Jumps

Finish Average race lasts 40 seconds

Sources: Rio 2016, Olympic.org, UCI

Pictures: AP, Getty Images