Motorcycle Lean Angle Calculator

Lean angle for a turn is calculated as arctan(v^2 / (r x g)), where v is speed, r is turn radius, and g is gravitational acceleration. A faster speed or tighter radius requires more lean. Road banking reduces the required lean angle.

Most sport bikes with modern tires can achieve 50-55 degrees of lean before hard parts (pegs, fairings) touch down. MotoGP bikes reach 63+ degrees. Cruisers are typically limited to 30-35 degrees due to lower ground clearance. The tire's grip and road surface are the ultimate limiting factors.

Lean angle increases with the square of speed. Going twice as fast through the same turn requires roughly four times the centripetal force, which means significantly more lean. This is why even small speed increases in corners dramatically increase the required lean angle.