What Suspension Parts Affect Camber?

Camber is the inward or outward tilt of a wheel when viewed from the front of the vehicle. Proper camber is essential for even tire wear, stable cornering, and predictable handling. While camber is primarily set by alignment specifications, many suspension parts can cause camber to shift out of spec or allow adjustments. Understanding which components affect camber helps you diagnose alignment issues and plan upgrades.

How Camber Is Adjusted

Most production cars have some form of factory camber adjustment. On MacPherson strut suspensions, camber is often adjusted at the strut-to-knuckle bolts or an eccentric bolt on the lower control arm. Double-wishbone setups typically allow adjustment at the upper control arm ball joint or via shims. However, worn or aftermarket parts can change camber even without direct adjustment.

Control Arms

Control arms connect the wheel hub to the vehicle frame. Their length, bushing condition, and mounting points directly affect camber.

Upper Control Arms

On double-wishbone suspensions, the upper control arm plays a large role in camber. If it has worn ball joints or bent arms, camber will change. Aftermarket upper control arms often provide additional camber adjustment for lowered vehicles.

Lower Control Arms

Lower control arms influence camber, especially on MacPherson strut designs. A bent lower control arm from a pothole impact can push the wheel outward at the top, increasing negative camber. Replacement arms may have eccentric bushings to allow camber adjustment.

Ball Joints

Ball joints are pivot points between control arms and the steering knuckle. Excessive wear or looseness in ball joints allows the knuckle to tilt, changing camber. A worn upper ball joint will often cause positive camber while a worn lower ball joint can cause negative camber. Always inspect ball joints when diagnosing camber issues.

Bushings

Suspension bushings are rubber or polyurethane components that allow controlled movement. Worn or deteriorated bushings—especially on control arms—let the arm shift out of position, altering camber. Polyurethane bushings are stiffer and can maintain alignment better, but they may require more frequent adjustment.

Struts and Shock Absorbers

On MacPherson strut vehicles, the strut assembly is a major camber influencer. The strut’s mounting holes and the orientation of the top mount determine camber. If the strut is bent from a collision, camber will be off. Aftermarket struts with slotted mounting holes offer camber adjustment. Shocks on separate suspensions have less direct effect, but if a shock is worn and allows excess body roll, dynamic camber changes during driving.

Springs

Coil springs support the vehicle’s weight. Sagging springs lower ride height, which typically increases negative camber because the control arm geometry pulls the top of the wheel inward. Lowering springs have the same effect. Conversely, lift springs can cause positive camber. If you change springs, you almost always need an alignment to correct camber.

Subframe and Chassis Mounts

The subframe holds the suspension components. If subframe bushings are worn or the subframe shifts out of position, all alignment angles—including camber—can be affected. On some vehicles, subframe shifting is a common issue after impacts. Proper subframe alignment is crucial for accurate camber.

Steering Knuckles and Hubs

Though less common, a bent steering knuckle or hub assembly can tilt the wheel and alter camber. This often happens from curb impacts. Replacing the knuckle restores correct geometry.

Alignment Adjustment Kits

If your vehicle lacks sufficient camber adjustment, aftermarket kits provide more range. Common options include:

• Eccentric bolts: Replace factory bolts with ones that have a cam lobe to push the control arm in or out.
• Camber plates: Installed at the top of MacPherson struts, these plates allow sliding adjustment.
• Adjustable control arms: Replace non-adjustable arms with ones that have threaded ends or eccentric bushings.

When choosing a kit, consider the amount of adjustment needed and whether it fits your suspension design. For daily drivers, a +/-2 degree adjustment is usually enough. For track cars, more range may be needed.

Signs of Incorrect Camber

If you suspect camber is off, look for:

• Uneven tire wear (inside or outside edge)
• Vehicle pulling to one side
• Steering wheel off-center after driving straight
• Reduced cornering grip or instability

A quick visual check: stand in front of the car and look at the tilt of both front wheels. If one looks more tilted than the other, get an alignment check.

Practical Recommendations

• Diagnose before adjusting: Inspect all suspension parts for wear, damage, or looseness before buying alignment kits. A worn bushing or ball joint will make adjustment pointless.
• Align after any suspension work: Replacing struts, springs, control arms, or even bushings often changes camber. Always get a four-wheel alignment.
• Select parts to match your goals: For a daily driver, keep camber within factory specs for tire life. For autocross or track use, aim for -1.5 to -3 degrees of negative camber at the front for better cornering—but accept faster inner tire wear.
• Use quality components: Cheap aftermarket parts may not hold alignment over time. Invest in reputable brands for control arms and adjustment kits.
• Check subframe alignment: If you’ve had a major collision, a bent subframe may prevent correct camber. Frame straightening may be necessary.

Final Recommendation

To properly address camber-related issues, start with a thorough inspection of all suspension components. Replace worn parts before attempting alignment. If your vehicle needs additional camber adjustment, choose a high-quality kit appropriate for your driving conditions. For most drivers, a professional alignment after suspension repairs is the simplest way to ensure correct camber. If you’re modifying for performance, plan for increased tire wear and consider adjustable arms for fine-tuning.