Camber is a slight tilt or curve built into a surface to improve performance. The term shows up across several fields, from car mechanics to aviation to road construction, but the core idea is always the same: angling or curving something deliberately so it works better under real-world conditions. Here’s how camber functions in the contexts you’re most likely to encounter it.
Camber in Wheel Alignment
This is the most common reason people search for “camber.” On a vehicle, camber angle is the tilt of a wheel when you look at it from the front or rear of the car. If the top of the wheel leans outward, away from the vehicle, that’s positive camber. If the top leans inward, toward the vehicle, that’s negative camber. A wheel that sits perfectly vertical has zero camber.
Most passenger cars leave the factory with a slight negative camber, typically between 0 and -1.0 degree. Performance and sports cars run a bit more aggressive, usually between -1.0 and -2.0 degrees. That small inward tilt helps the tire maintain full contact with the road during cornering, when the car’s weight shifts and the tire naturally wants to roll onto its outer edge. A touch of negative camber counteracts that roll, keeping more rubber on the pavement when it matters most.
Too much camber in either direction causes problems. Excessive negative camber wears down the inner edge of your tires prematurely, because the inside of the tread carries more of the load during straight-line driving. Excessive positive camber does the opposite, chewing up the outer edge. Either pattern is a clear sign your alignment needs attention. Left unchecked, uneven camber wear shortens tire life significantly and can make the car feel unstable or pull to one side.
How Camber Is Adjusted
On most modern cars with MacPherson strut suspensions, camber is adjusted using cam bolts (sometimes called eccentric bolts). These specially shaped bolts sit at the connection between the strut and the steering knuckle. Rotating the bolt shifts the knuckle slightly inward or outward, changing the wheel’s tilt by fractions of a degree. Some vehicles use shims (thin spacers) or adjustable control arms instead, but cam bolts are the most common method at alignment shops.
Not every vehicle comes with built-in camber adjustment from the factory. When a car needs correction beyond what the stock hardware allows, a shop will install aftermarket cam bolt kits to add that adjustability. A standard four-wheel alignment checks camber on all wheels and corrects it to the manufacturer’s specification, which is why it’s worth getting an alignment after hitting a large pothole, replacing suspension components, or noticing uneven tire wear.
Camber in Aerodynamics
In aviation and aerospace engineering, camber refers to the curvature of a wing’s cross-section (its airfoil). A symmetric airfoil, where the top and bottom surfaces mirror each other, produces no lift when flying level. Add curvature to the airfoil, especially near the trailing edge, and the wing starts turning the airflow downward. That turning is what generates lift.
NASA educational materials illustrate this clearly: a symmetric airfoil produces zero net turning of airflow and no lift, while a cambered airfoil turns the air significantly and generates substantial lift. The more camber an airfoil has, the more lift it produces at any given speed and angle. This is why commercial aircraft wings have a visible curve to their profile rather than being flat or symmetrical. Engineers can also combine camber with angle of attack (tilting the whole wing upward) to fine-tune how much lift a wing generates at different flight phases.
Camber in Skis and Snowboards
Pick up a ski or snowboard and set it on a flat surface. If the middle arches upward while the tip and tail touch the ground, that arch is camber. It works like a spring: when you stand on the board, your weight flattens the camber and presses the edges into the snow along their full length. Step off, and the board springs back to its arched shape.
That springiness does several useful things. It gives you consistent edge contact on hard, groomed snow, which translates to reliable grip while carving turns. It provides stability at high speeds, which is why racers overwhelmingly use cambered equipment. And it stores and releases energy during turns and jumps, creating what riders call “pop,” the snappy rebound you feel when launching off a jump or transitioning between turns. Cambered skis and boards are the go-to choice for groomed resort runs, racing, and riders who prioritize precision and edge hold over the looser, more forgiving feel of rockered (reverse-camber) designs.
Camber in Road Design
Roads aren’t flat. Look closely at a well-built road and you’ll notice it’s slightly higher in the center than at the edges. That gentle slope is camber, and its job is drainage. Without it, rainwater pools on the surface, increasing the risk of hydroplaning and accelerating pavement deterioration.
Road camber is measured as a ratio or percentage. A camber of 2.5% means the surface drops 2.5 units vertically for every 100 units of horizontal distance from the crown (center) to the edge. Smoother surfaces need less camber because water runs off them more easily. Concrete and thick asphalt roads typically use a camber of 1.7% to 2.0%. Gravel roads, which absorb and hold more water, need steeper slopes of 2.5% to 3.0%. Unpaved earth roads in high-rainfall areas may use camber as steep as 4.0% to keep the surface from becoming waterlogged.
The Common Thread
Whether it’s a wheel tilted a fraction of a degree, a wing curved to grab the air, a snowboard arched for grip, or a road crowned for drainage, camber always serves the same basic principle: a small, intentional deviation from flat or straight that makes something perform better under the forces it actually encounters. The specifics change depending on the field, but the concept is remarkably consistent.