Your car should feel calm when you’re driving straight.

If it keeps trying to move left or right, something is changing the balance.

Sometimes the cause is simple.

Sometimes it’s alignment.

And sometimes it has nothing to do with alignment at all.

First, is it actually pulling?

There’s a difference between a car that pulls and one that simply follows the road.

Most roads are not perfectly flat.

They are usually built with a slight slope so rainwater can drain toward the shoulder.

That slope is called road crown.

Because of it, a car may naturally drift slightly toward the lower side of the road.

A strong, constant pull is different.

If you’re always holding the steering wheel against the car to keep it straight, it’s worth investigating.

Tire pressure can cause a pull

Start with the easy stuff.

If one front tire has noticeably less pressure than the other, it can change how the car rolls.

The lower tire may create more rolling resistance and cause the car to drift toward that side.

Tires themselves can cause it

Two tires can look almost identical and still behave differently.

Uneven wear, internal tire construction, damage, or different tire models can all affect how the vehicle tracks.

Sometimes swapping the front tires left to right changes the direction of the pull.

That’s a strong clue that the tire itself may be involved.

Camber can affect direction

Camber is the inward or outward tilt of the tire when viewed from the front.

If the left and right sides have noticeably different camber, the car may want to move toward one side.

This difference from side to side is often called cross camber.

The exact way the car reacts depends on the vehicle and suspension design, but a large difference between sides is worth checking.

Caster can affect straight-line stability

Caster helps the steering naturally return toward center.

It also plays a big role in how stable the car feels while driving straight.

If one side has much less positive caster than the other, the car can pull toward that side.

This is called cross caster.

Rear alignment matters too

A pull doesn’t always start at the front.

The rear wheels help determine the direction the entire car wants to travel.

If rear toe is uneven, the rear of the car can push the vehicle slightly sideways.

The driver then corrects with the steering wheel.

That can feel like:

• A crooked steering wheel
• Constant small steering corrections
• A car that feels nervous on the highway
• A vehicle that seems to dog track

This is where thrust angle becomes important.

If the rear wheels are pointing the car slightly away from the vehicle’s centerline, the front wheels have to compensate.

Does it only pull when braking?

That changes the diagnosis.

If the vehicle drives straight normally but pulls hard when you press the brake pedal, alignment may not be the main problem.

Possible causes include:

• A sticking brake caliper
• Uneven braking force
• Brake hose problems
• Worn suspension components
• Tire differences

Did it start after hitting something?

Think back.

Did you recently hit:

• A pothole
• A curb
• Road debris
• A large bump

Even if the car still drives and nothing looks damaged, an impact can change alignment or move a suspension component.

Sometimes the change is small.

But small changes can be noticeable at highway speed.

Don’t chase the steering wheel first

A crooked steering wheel is a clue.

It is not always the root problem.

You can center a steering wheel and still have a car that isn’t tracking correctly.

That means looking at the whole picture:

• Tire pressure
• Tire condition
• Front toe
• Rear toe
• Camber
• Caster
• Thrust angle
• Steering and suspension condition
• Brakes

Start simple. Then measure.

If your car suddenly starts pulling, don’t immediately start adjusting things.

Start with the basics.

Check the tire pressure.

Look at the tires.

Think about when the problem started.

Then inspect the suspension and measure the alignment.