After installing new suspension parts like control arms, struts, springs, or bushings, your vehicle’s wheel alignment is almost certainly off. Replacing components that connect the wheels to the chassis changes the angles at which the tires sit relative to the road and each other. Driving without an alignment can cause rapid tire wear, poor handling, and a crooked steering wheel. While a professional alignment is the gold standard, you can handle some adjustments at home with the right tools and know-how. This guide covers why alignment matters, what you need, and how to do it yourself.
Why Wheel Alignment Is Necessary After Suspension Work
Every suspension component is built to specific tolerances. When you install new parts (even OEM replacements), the geometry shifts slightly. The three primary alignment angles are camber, caster, and toe. Camber is the tilt of the tire inward or outward when viewed from the front. Caster is the steering axis tilt when viewed from the side. Toe is the difference in distance between the front and rear of the front tires. Replacing control arms can alter camber; new struts affect caster; tie rods or bushings impact toe. Even a small misalignment leads to uneven tread wear (feathering or cupping), pulling to one side, and reduced fuel economy. Skipping an alignment after suspension work is a shortcut that costs you money and safety.
Tools and Equipment You'll Need
To align wheels at home, you need some basic tools. For a DIY string alignment, gather:
- Jack and jack stands
- Tape measure (preferably 25-foot)
- String line (fishing line or mason line) and weights or jack stands to hold it
- Wrenches and sockets for tie rod lock nuts and adjustment bolts
- A ruler or caliper for precise toe measurements
- Camber/caster gauge (optional but helpful)
- Turnbuckles if using a commercial alignment kit
If you plan to adjust camber or caster, check whether your suspension has eccentric bolts (common on many FWD cars), slotted strut mounting holes, or aftermarket adjustable control arms. Without these, you may need a professional press or shims. Note: A driveway alignment won’t be as precise as a $100 shop alignment, but it can get you close enough to avoid destroying tires.
Step-by-Step Guide to Aligning Wheels at Home
Preparing the Vehicle
First, ensure the suspension is settled. Drive the car a few miles to let springs and bushings take their set. Then park on a perfectly level surface (check with a bubble level on the floor). Set tire pressures to the manufacturer’s specification (usually on the door jamb sticker). If your car has adjustable coilovers or ride height, set it where you want it before measuring. Most alignment adjustments are made with the vehicle at normal ride height. Raise the car only if you need to adjust something that requires wheel removal—otherwise, keep the wheels on the ground.
Measuring and Adjusting Toe
Toe is the easiest DIY adjustment. The goal is to have the front tires parallel (or a slight toe-in of 0° to 0.125 inches). Use the string method:
- Place two jack stands (or something heavy) at the front and back of the car, roughly 6 inches away from the body on each side.
- Tie a string between the front and rear stands on each side, making the strings parallel to each other and centered around the car. You can center them by measuring from the center caps of the rear wheels to the string. Adjust the stands until the distance is equal both sides.
- Now, at the front tire, measure from the string to the front edge of the rim (at hub height) and then to the rear edge of the rim (same height). The front measurement should be about 1/16 to 1/8 inch closer to the string than the rear (toe-in). If the rear is closer, you have toe-out.
- To adjust, loosen the lock nut on each tie rod and turn the inner tie rod (or the adjustment sleeve) to move the steering arm. One full turn changes toe roughly 1/16 inch. Turn equally on both sides to keep the steering wheel centered. After each adjustment, re-measure and tighten the lock nut.
An alternative method: Simply measure between the inside tread blocks of both front tires at the front and rear of the tire. The difference (front measurement minus rear measurement) should be 0 to 1/8 inch (toe-in). This works but is less accurate because tires bulge.
Adjusting Camber and Caster
Camber and caster adjustments are more complex. On many vehicles, camber is set by eccentric bolts on the lower control arm or slotted strut mounting holes. With the car on jack stands (suspension loaded from below with a floor jack), loosen the bolts and tilt the hub in or out. A camber gauge (like a magnetic gauge or digital level) helps. For caster, if your vehicle has adjustable strut rods or pivot points, you may need shims or slots. Many modern cars have fixed caster—only camber and toe are adjustable. If you can’t adjust these easily, it’s best to visit a shop. A rough method: measure the same string distance at the top and bottom of the wheel. Top should be slightly closer to the string for negative camber (usually -0.5° to -1.5°). But without a gauge, you’re guessing.
Checking with a Tape Measure for Toe (Quick Method)
If you want a no-string check: Drive the car onto a level surface, steer straight, and mark chalk lines on the rear of the front tires. Then roll the car forward half a wheel rotation and measure the distance between the marks (same tread spots). The difference between front and rear measurements gives toe. For example, if front measurement is 60 inches and rear is 60.2 inches, you have 0.2 inches of toe-in (acceptable). Adjust tie rods accordingly.
When to Visit a Professional Alignment Shop
A home alignment is a stopgap. Professional shops use laser or 3D alignment racks that measure all angles to factory specs. You should visit a pro if:
- You cannot adjust camber or caster yourself (e.g., no adjusters).
- Your car has multi-link rear suspension.
- You’re after a specific spec (track alignment).
- The steering wheel is off-center after adjustments.
- You don’t have the tools or space.
- The job requires thrust angle adjustment (rear wheel alignment).
Cost is typically $75–$150 for a standard four-wheel alignment. It’s money well spent to avoid premature tire wear (saving $500+ on tires) and to ensure safe handling.
Final Recommendation
After installing new suspension parts, align your wheels as soon as possible. Start with a basic toe adjustment using the string method—it’s free, accurate enough for daily driving, and easy to do. For camber and caster, invest in a gauge or pay a shop. Drive a few hundred miles, then re-check alignment to ensure the suspension settled. If you’re replacing parts frequently (lowering springs, track use), consider adjustable camber plates or rear arms to make future alignments easier. Remember: a perfect home alignment is tough; if you value precise handling or have expensive tires, book a professional. But for most DIY jobs, following this guide will get you safely back on the road while your tires wear evenly.