295/40R21 tire size breakdown:
295 = Tire width is 295 mm
40 = Aspect ratio; sidewall height is 40% of 295 mm = 118 mm
R = Radial construction
21 = Fits a 21-inch wheel (rim)
Key Measurements
Sidewall height: 118 mm (4.6 inches)
Rim diameter: 21 inches (533.4 mm)
Overall tire diameter: ≈ 769 mm (30.3 inches)
Circumference: ≈ 2,415 mm (95.1 inches)
Common Applications
This size is often used on performance SUVs and luxury vehicles, such as:
BMW X5
BMW X6
Porsche Cayenne
Range Rover Sport
Characteristics
Wide footprint for excellent grip and stability
Sporty handling and cornering performance
Premium SUV appearance
Shorter sidewall means a firmer ride and increased risk of wheel damage from potholes compared with higher-profile tires.