A wheel alignment adjusts three angles: camber, caster, and toe. Each one describes how a wheel is tilted or pointed relative to the car, and each affects something different — tire wear, steering feel, or straight-line stability. Here is what the three angles mean, how to tell when they are off, and what an alignment can and cannot fix.
The three angles at a glance
| Angle | Viewed from | Describes | Mainly affects |
|---|---|---|---|
| Camber | front of the car | inward or outward tilt of the wheel’s top | tire contact patch, cornering grip, edge wear |
| Caster | side of the car | forward or backward tilt of the steering axis | steering self-centering, high-speed stability |
| Toe | above the car | whether the wheels point in or out | tire wear, turn-in response, straight-line tracking |
Camber
Look at a car head-on. If the top of a wheel leans in toward the engine, that is negative camber; if it leans out, positive camber. Most road cars use zero to slightly negative camber. A little negative camber helps because the car’s body rolls in a corner, which tilts the outside tire; starting with the top tipped inward keeps more of the tread flat on the road when it matters. Too much negative camber, though, concentrates load on the inner edge during straight-line driving and wears that edge first. Track-focused setups run more negative camber than a daily driver can tolerate for exactly this reason.
Caster
Caster is the angle of the line the front wheel steers around, seen from the side. Positive caster tilts that line backward at the top, like the front fork of a bicycle, and it is why the steering wheel returns to center after a turn and why a car tracks straight at highway speed. More positive caster generally means more stability and a heavier steering feel. Caster has little direct effect on tire wear, but uneven caster from side to side can make a car pull toward one side.
Toe
Toe is the easiest angle to picture: view the car from above. If the fronts of a pair of wheels point toward each other, that is toe-in; pointing apart is toe-out. Small toe values have a big effect on tire wear, because a wheel with any toe is being scrubbed slightly sideways as it rolls. Factory settings are usually close to zero, with slight toe-in commonly used for stability. Toe-out sharpens turn-in and is sometimes used in performance setups, at the cost of a more nervous feel.
Signs your alignment is off
The car pulls to one side on a flat road, the steering wheel sits off-center when driving straight, or the tires wear unevenly. The wear pattern often points to the cause: wear on one edge usually suggests camber, while a feathered, saw-tooth feel across the tread usually suggests toe. Note that road crown, uneven tire pressures, and worn suspension parts can create similar symptoms, so a shop should check those first.
When to get an alignment
- After replacing steering or suspension components such as tie rods, control arms, or struts.
- After a hard pothole or curb impact, especially if the steering wheel is now off-center.
- After lowering or lifting a vehicle — changing ride height changes the geometry. Even factory lifts count: an off-road trim like the Lexus GX 550 Overtrail is aligned for its taller stance.
- When fitting new tires, to protect the investment. Upgrading to high-performance rubber such as the tires in our BMW 335i tire guide is wasted if the alignment eats the inner edges.
What an alignment cannot fix
An alignment sets angles; it cannot compensate for worn parts. Loose ball joints, tired bushings, or bent components let the angles change while you drive, so the car will not hold its settings. On older cars such as an E90 or E92 BMW 328i, replacing worn suspension bushings before the alignment is what makes the alignment last. Also, many cars only offer toe adjustment from the factory; changing camber may require eccentric bolts or an aftermarket kit.
Alignment specifications vary by vehicle; always use the manufacturer’s values for your car, September 2026. Photos: Mike Peel / Wikimedia Commons, CC BY-SA 4.0.
