How To Do An Alignment On A Car | Straight-Track Setup

A car alignment adjusts toe, camber, and caster so the tires point correctly and the steering tracks straight.

A home alignment can fix mild pull, an off-center steering wheel, and rapid edge wear when the suspension is healthy. The job is measurement, not guesswork. You’ll set the car on a flat floor, measure the wheel angles, make small tie-rod changes, then recheck until the numbers match the service specs for your exact model.

There’s one limit worth stating early: a driveway setup is best for front toe and basic checks. Camber and caster may need special bolts, slotted struts, shims, or a rack. If the car was hit, lowered, lifted, or has worn steering parts, pay a shop to inspect it before you chase numbers.

What A Car Alignment Changes

Alignment is the position of the wheels in relation to the car and the road. The three main angles are toe, camber, and caster. Toe has the biggest effect on tire scrub during straight driving, which is why it’s the usual home adjustment.

Toe

Toe is the inward or outward point of the tires when seen from above. Toe-in means the front edges of the tires sit closer together. Toe-out means the front edges sit farther apart. Too much of either can chew the tread fast and make the car feel nervous.

Camber

Camber is the tilt of the tire when seen from the front of the car. Negative camber means the top of the tire leans inward. Positive camber means it leans outward. A small amount can be normal, but big side-to-side differences can cause pull and one-edge wear.

Caster

Caster is the forward or rearward tilt of the steering axis when seen from the side. More positive caster helps the wheel return to center after a turn. Many daily drivers don’t have easy caster adjustment, so a bad caster reading often points to bent or worn parts.

Tools And Setup That Make The Numbers Trustworthy

Start with a cold car on a flat garage floor or driveway slab. Fill the tires to the door-placard pressure, remove heavy cargo, and set the steering wheel straight. The NHTSA TireWise tire safety page backs the same habit of checking tire condition and pressure before relying on tire behavior.

You’ll need two jack stands, string, a tape measure, masking tape, a wrench for the tie-rod lock nuts, and a way to mark the steering wheel center. A camber gauge or digital angle finder helps if your car has camber adjustment. Do not crawl under a car held by a jack alone; the OSHA jack standard says rated capacity must be marked and not exceeded, which is a good rule for home work too.

Roll the car forward and back a few feet after lifting, lowering, or adjusting it. This settles the tires and removes bind from the suspension. If you skip that step, the tape measure may tell you a neat lie.

How To Do An Alignment On A Car Before You Start

Before turning any nut, confirm that the steering and suspension can hold an adjustment. Grab each front tire at 3 and 9 o’clock and rock it. Then grab it at 12 and 6 o’clock. Clunks, looseness, torn boots, leaking struts, or rough wheel bearings must be fixed first.

Find the factory alignment specs in the service manual, repair database, or underhood label if your model has one. Specs may change by trim, wheel size, ride height, and suspension package. Use the “total toe” number if you’re setting both front wheels, then split it evenly left and right unless the manual says otherwise.

Item To Check	What You Want	Why It Matters
Tire pressure	Door-placard pressure on all tires	Uneven pressure can mimic pull and bad toe.
Tire wear	Even tread with no cords or bulges	Damaged tires can ruin your readings.
Steering wheel	Centered and lightly taped in place	A centered wheel keeps left and right toe honest.
Floor	Flat enough that the car sits naturally	A sloped floor can skew camber readings.
Suspension height	Normal ride height, no heavy cargo	Ride height changes alignment angles.
String line	Parallel to the car’s centerline	Crooked string creates false toe numbers.
Tie rods	Clean threads and free lock nuts	Stuck hardware can shift the setting too far.
Service specs	Correct year, trim, tire, and suspension	The wrong spec can make a good car drive badly.

Set The String Line And Measure Toe

Place one stand near each end of the car on both sides. Run string along each side at wheel-center height. Measure from the string to the rear wheel rim at the front and rear edges. Shift the stands until the string is parallel to the rear wheel on each side.

Now measure the front wheel rim the same way. If the distance from string to the front edge of the rim is smaller than the rear edge, that wheel has toe-out. If the front edge distance is larger, that wheel has toe-in. Write down left and right readings before touching the tie rods.

Make Small Tie-Rod Changes

Loosen the tie-rod lock nut on one side. Turn the adjuster a small amount, then snug the lock nut enough to hold the setting. Many tie rods change toe fast, so start with a quarter turn or less. Match both sides so the steering wheel stays centered.

After each change, roll the car forward and back, bounce each front corner by hand, then remeasure. Repeat until the total toe matches the spec. Tighten the lock nuts to the service-manual torque when you’re done.

Check Camber, Caster, And Tire Clues

For camber, place the gauge against the wheel or brake rotor surface as your tool instructions say. Compare left and right readings. If the car allows camber adjustment, loosen the specified fasteners, move the strut or control arm in tiny steps, then tighten and recheck.

Caster is harder at home because it is measured during a steering sweep. A turn-plate setup and gauge can do it, but most driveway work stops at checking whether left and right sides are close. A big mismatch after a curb strike is a shop-rack job.

Symptom After Driving	Likely Cause	Next Step
Steering wheel sits off center	Toe split uneven left to right	Adjust both tie rods equally in opposite directions.
Car pulls one way	Camber mismatch, tire issue, brake drag	Swap front tires side to side, then recheck.
Both front tires feather	Total toe out of range	Reset toe and inspect tie-rod ends.
One inner edge wears fast	Too much negative camber or toe-out	Measure camber, then set toe again.
Car wanders on the highway	Low caster, loose parts, wrong tire pressure	Inspect steering parts before another adjustment.

Road Test And Final Adjustments

Take the car on a calm road with light traffic. Hold the wheel gently, then note whether it tracks straight, pulls, or needs constant correction. A slight road crown can tug the car right, so test on more than one lane before changing anything.

If the wheel is centered and the car tracks cleanly, recheck the lock nuts and mark their position with paint pen. If the steering wheel is off center but the car drives straight, adjust both tie rods by the same amount in opposite directions. That moves the wheel center without changing total toe much.

When A Shop Alignment Is The Better Call

A home setup can get a daily driver close, but it can’t replace a calibrated rack for every case. Use a shop if the car has driver-assist cameras tied to steering angle, a recent crash repair, new control arms, lowered springs, lifted suspension, or uneven rear toe.

Rear alignment matters too. Many cars have adjustable rear toe and camber, and the rear axle can steer the car if it’s off. If the rear readings are wrong, front toe won’t fix the way the car feels.

Final Checklist Before You Park The Tools

• Factory specs matched to the exact vehicle.
• Tire pressure set before measuring.
• Steering wheel centered and held still.
• Toe measured after each adjustment and after rolling the car.
• Lock nuts tightened to the correct torque.
• Short road test done on more than one stretch of road.
• Tread checked again after a few hundred miles.

Good alignment work feels calm when you drive. The wheel returns neatly, the car doesn’t dart, and the tires wear evenly across the tread. Take your time, change one thing at a time, and let the measurements lead the wrench.