Forza Horizon 6 tuning guide: every setting explained

If a car feels fast but fights you in corners, tuning is what closes that gap. You do not need to be an engineer. Learn what each slider does, learn which way to nudge it, then change one thing at a time and test. This guide walks every setting in order, and for instant baseline numbers you can pair it with our tuning calculator. To plan which upgrades to fit before you tune, work through our tune builder.

How do I fix understeer and oversteer?

Understeer is the front washing wide; oversteer is the rear stepping out, and fixing one of them is what most tuning comes down to. Change one setting at a time, test on the same corner, and use this cheat sheet for which way to move each slider. Anti-roll bars and the differential shift balance the most, so start there.

Want to see the tuning menu in motion before you read? HokiHoshi's refresher covers the same screens and logic.

First, understand the contact patch

Everything below comes back to one idea. Each tire touches the road over a small patch, and grip is that patch pressing evenly on the surface. Tire pressure shapes the patch, alignment controls how flat it sits when the car leans, and springs and dampers decide whether it stays in contact over bumps and weight transfer. Keep that picture in mind and the sliders stop feeling random.

Tire pressure

Lower pressure grows the contact patch for more grip and quicker heating, but go too low and the car turns vague and the tires overheat. Higher pressure sharpens response and sheds grip.

• Tarmac: aim for an ideal hot pressure around 30 psi.
• Dirt and cross country: run lower for compliance and grip over rough ground.

If one end feels short on grip, drop a little pressure at that end first, since it is the quickest change to feel.

Gearing

The final drive scales the whole gearbox. A longer final drive raises top speed, a shorter one sharpens acceleration.

• Set top gear so the car tops out near the end of the longest straight you race on. Pulling redline well before the straight ends wastes speed.
• Tighten the lower gears so the engine stays in its strongest power band coming out of corners.

Shorter overall gearing suits twisty point-to-point routes; longer gearing suits open road and speed traps.

Alignment: camber, toe and caster

• Camber: a little negative camber keeps the patch flat as the car leans, improving cornering grip. Too much hurts braking and straight-line traction. Start around -1.0 to -1.5 degrees at the front.
• Toe: front toe-out sharpens turn-in but adds twitch and tire wear; rear toe-in adds stability. Most road builds sit near zero.
• Caster: more caster improves high-speed stability and steering feel. Many cars are happy around 5 to 6 degrees.

Anti-roll bars

Anti-roll bars fight body roll and are the single easiest way to balance a car. Stiffer at the front adds understeer; stiffer at the rear adds oversteer.

• Pushing wide and lazy to turn: soften the front bar or stiffen the rear.
• Snapping loose or stepping out: do the opposite.

Make these changes in small steps and they will reshape how the car turns without touching anything else.

Springs and ride height

Stiffer springs keep the car flat and sharp on smooth tarmac but skittish over bumps. Softer springs find grip on rough surfaces by letting the wheels follow the ground. Balance front and rear to the car's weight distribution, which is exactly the calculation the tuning calculator does for you.

Ride height follows the surface:

• Lower for tarmac to drop the center of gravity and improve cornering.
• Raise for dirt and cross country so you do not bottom out, which matters for the kind of builds in our best dirt and rally cars guide.

Damping: bump and rebound

Springs decide how much the car moves; dampers decide how fast. Rebound controls how quickly a spring extends, bump controls how quickly it compresses. Stiffer damping suits smooth roads and sharper response; softer damping soaks up bumps and keeps tires planted.

A common starting point is rebound a little stiffer than bump. If the car skips or chatters over bumps, soften both ends a touch.

Differential

The differential decides how power and engine braking split across the driven wheels, and it has a big say in rotation.

• Acceleration lock: higher puts power down harder and adds stability on throttle, but too high causes corner-exit understeer.
• Deceleration lock: higher steadies the car when you lift off; lower lets it rotate more into a corner.
• AWD balance: more rear bias makes an all-wheel-drive car feel livelier and closer to rear drive, which is why drift builds lean that way. See our best drift cars guide for where that pays off.

Aerodynamics

More downforce means more cornering grip but more drag and a lower top speed. Crank it up for twisty circuits, trim it back for high-speed and drag runs. Front and rear aero also shift balance, so adding rear downforce is a clean way to calm a loose car without softening the suspension.

A simple one-change-at-a-time process

Resist the urge to move five sliders at once. A repeatable loop beats guesswork:

1. Start from a sensible baseline. Auto-upgrade or the tuning calculator gets you close.
2. Pick the single biggest problem, almost always understeer or oversteer.
3. Fix it with anti-roll bars and the differential first, since they move balance the most.
4. Drive the same stretch of road and feel the difference before touching anything else.
5. Then fine-tune springs, damping, alignment and gearing one slider at a time.

Tune the car to how you actually drive, not to a number on a screen. Once a build feels planted and predictable, you will lap faster on the same hardware. Build a baseline in the tuning calculator, then come back here whenever a specific setting is misbehaving.