Cross camber is the difference in camber angle between your left and right wheels. If the left front wheel is tilted at one angle and the right front wheel is tilted at a slightly different angle, the gap between those two values is your cross camber. It’s one of the most overlooked alignment measurements, and it’s often the real reason a car pulls to one side even when every individual wheel appears to be within specification.
How Camber and Cross Camber Work
Camber refers to the inward or outward tilt of a wheel when viewed from the front of the vehicle. If the top of the wheel leans toward the car’s body, that’s negative camber. If it leans outward, that’s positive camber. Most passenger vehicles run a slight negative camber to improve cornering grip.
Cross camber isn’t a separate adjustment. It’s a calculated value: you subtract the camber reading on one side from the other. If your left front wheel reads -0.10 degrees and your right front reads +0.50 degrees, your cross camber (or camber delta) is 0.60 degrees. That mismatch creates a real problem, even though each individual wheel might technically fall within the manufacturer’s acceptable range.
Why Cross Camber Makes Your Car Pull
A tilted wheel generates a small sideways force as it rolls. The tire’s contact patch deforms slightly in the direction the wheel leans, creating what engineers call camber thrust. When both front wheels have the same camber angle, these sideways forces cancel each other out. When the angles don’t match, the forces are unbalanced, and the car drifts toward the side with more positive (or less negative) camber.
This is where the “in the green” misconception trips people up. A common alignment printout might show both wheels within the manufacturer’s tolerance, but at opposite ends of the range. Say the left front reads +0.10 degrees and the right front reads -0.10 degrees. Both numbers look fine individually. But both wheels are now leaning to the left, and the vehicle will pull left on a flat road, even though a quick glance at the alignment report shows everything in spec. Some manufacturers now specify a maximum cross camber value for exactly this reason.
Cross Camber vs. Cross Caster
Cross caster is a similar concept applied to the caster angle, which is the forward or rearward tilt of the steering axis. While cross camber creates a constant pull at any speed, cross caster primarily affects steering returnability and effort. Both are adjusted intentionally on most street cars to compensate for crowned roads.
On vehicles set up for driving on the right side of the road, the right side is typically aligned with about a quarter degree more negative camber and a quarter degree more positive caster than the left. This offsets the natural tendency of the car to drift “downhill” toward the right gutter on a crowned road surface. The tradeoff is that on a perfectly flat road, or one that slopes to the left, the car may drift slightly left.
How to Spot a Cross Camber Problem
The most obvious symptom is a consistent pull to one side on flat, straight road. This is different from a momentary drift caused by wind or road grooves. A cross camber pull is steady and repeatable. Camber is classified as a “minor wear angle,” meaning it won’t chew through tires as fast as a toe misalignment will. But over thousands of miles, unequal camber can cause slightly uneven wear across the left and right tires, with the side carrying more positive camber showing more wear on its outer edge.
If your car pulls but the alignment shop says everything is within spec, ask them to check the cross camber value specifically. A delta of more than about half a degree between the two sides is enough to create a noticeable pull in most vehicles.
How Cross Camber Is Corrected
Correcting cross camber means adjusting the camber on one or both sides until the difference between them falls within an acceptable range. The method depends on your vehicle’s suspension design. Some cars have built-in adjustment points, like slotted mounting holes on the strut tower. Others require aftermarket cam bolts, which replace a fixed bolt with one that can rotate to shift the wheel’s angle. In some cases, shims are placed behind suspension components to achieve the same effect.
On vehicles with no factory camber adjustment, aftermarket cam bolt kits are the most common solution. These allow a technician to fine-tune the angle without modifying the suspension itself.
Cross Camber in Motorsports
In everyday driving, the goal is to minimize cross camber (or set it to a specific small value for road crown). In racing, it becomes a deliberate tuning tool. On an oval track like those used in NASCAR, cars only turn left. The right wheels are always on the outside of a turn, so mechanics run negative camber on them to maximize grip. The left wheels, on the inside, get positive camber. This intentional cross camber setup maximizes cornering speed by keeping as much tire contact patch on the road as possible through the turn. It would make the car nearly undrivable on a straight highway, but on a left-turn-only oval, it’s a significant competitive advantage.