FH6 Tuning Guide — Complete Forza Horizon 6 Car Tuning (2026)

Tuning Basics — What Actually Matters

Forza Horizon 6 uses the same deep tuning system as FH5, with refinements to suspension and aero modeling. You don't need to touch every slider to get results. Focus on these four areas first — they make 80% of the difference:

Gearing — The single biggest performance lever. Wrong gear ratios make even the best car feel slow. Right ratios shave seconds off lap times.

Tire Pressure — Affects grip and heat buildup. Lower pressure = more grip but slower top speed. Higher pressure = faster but less forgiving.

Anti-Roll Bars — Controls how the car rotates through corners. Stiffer front = understeer. Stiffer rear = oversteer. This is your handling balance knob.

Aero Downforce — Trade speed for cornering grip. More downforce = glued to the road but slower on straights. Less = faster top end but twitchy in corners.

Every Tuning Parameter Explained

Tires

Setting	What It Does	Starting Point
Tire Pressure (Front/Rear)	Lower = more grip, more heat, slower top speed. Higher = opposite.	28-30 PSI road; 26-28 PSI dirt; 24-26 PSI cross country

Gearing

Setting	What It Does	Starting Point
Final Drive	Shifts entire gear range. Higher = more acceleration, less top speed.	Start stock. Adjust until top gear redlines at fastest track point.
1st-2nd Gear	Launch and low-speed corners.	Short enough to avoid bogging out of hairpins.
3rd-5th Gear	Mid-range — most corners happen here.	Tighten spacing for power band (5,000-7,000 RPM).
6th+ Gear	Top speed on long straights.	Stretch to just below redline at end of longest straight.

Alignment

Setting	What It Does	Starting Point
Camber (Front)	Negative = more cornering grip, less braking stability.	-1.0° to -1.5° road; -0.5° to -1.0° dirt
Camber (Rear)	Same trade-off for rear axle.	-0.5° to -1.0° road; -0.3° to -0.5° dirt
Toe (Front)	Toe-out = better turn-in, less straight-line stability.	0.1° to 0.3° out road; 0° dirt
Toe (Rear)	Toe-in = stability. Toe-out = looser rear.	0.0° to -0.2° (toe-in) for stability
Caster Angle	Higher = more camber in turns, heavier steering.	5.5° to 6.5° for most cars

Anti-Roll Bars

Setting	What It Does	Starting Point
Front ARB	Stiffer = less body roll, more understeer.	20-25 road; 15-20 dirt
Rear ARB	Stiffer = more oversteer, sharper turn-in.	25-30 road; 20-25 dirt

Pro tip: Rear ARB 5-10 units higher than front = neutral to mild oversteer. Equal values = understeer.

Springs & Damping

Setting	What It Does	Starting Point
Spring Rate	Stiffer = better response, worse over bumps.	Road: 70-80% stiffness. Dirt: 50-60%. Cross country: 30-40%.
Ride Height	Lower = better aero/CG. Higher = rough terrain.	Road: minimum. Off-road: near max.
Rebound	Controls spring extension speed.	~70% of bump stiffness as baseline.
Bump	Controls compression speed.	Road: 6-8. Dirt: 4-6. Cross country: 2-4.

Aero & Differential

Setting	What It Does	Starting Point
Front Downforce	More = better turn-in, less understeer.	Match or slightly exceed rear for neutral balance.
Rear Downforce	More = high-speed stability, less top speed.	Speed tracks: min. Technical: max.
Acceleration Lock	Higher = both wheels spin together, more traction.	RWD: 60-75%. AWD F: 30-40%, R: 60-70%.
Deceleration Lock	Higher = more engine braking stability.	RWD: 20-30%. AWD: 10-20%.

Class-Specific Tuning Setups

🏎️ S1/S2 Road Racing — Speed Build

Tires: 30/30 PSI

Gearing: Speed-focused final drive

Camber: -1.5°/-1.0°

ARB: 22/30

Springs: 75%/70%

Ride Height: Minimum

Aero: Min front, min rear

Diff Accel: 60% RWD

Use for: Highway sprints, Goliath. Trade cornering for raw top speed.

🔄 A Class — Balanced All-Rounder

Tires: 29/29 PSI

Gearing: Balanced final drive

Camber: -1.2°/-0.8°

ARB: 20/28

Springs: 65%/60%

Ride Height: 2-3 clicks from min

Aero: 50% front, 40% rear

Diff Accel: 55% RWD

Use for: Most road circuits. The most versatile setup.

🏔️ B/A Class Dirt — Rally Setup

Tires: 27/27 PSI

Gearing: Acceleration-focused

Camber: -0.8°/-0.5°

ARB: 18/24

Springs: 50%/45%

Ride Height: 70-80% max

Aero: N/A

Diff Accel: 75% RWD

Use for: Dirt and mixed-surface races. Softer springs absorb bumps.

💨 Drift Build

Tires: 35+/35+ PSI

Gearing: Short 2nd-3rd gear

Camber: -3.0°/-0.5°

ARB: 30/10

Springs: 80%/40%

Ride Height: Minimum

Diff Accel: 90-100%

Diff Decel: 0-5%

Use for: Drift zones. High rear PSI reduces grip, locked diff keeps wheels spinning.

Quick Reference — Tuning Cheat Sheet

Problem	Fix
Car understeers (won't turn)	Soften front ARB, stiffen rear ARB, add front negative camber, reduce front toe-in
Car oversteers (rear slides out)	Stiffen front ARB, soften rear ARB, reduce rear tire pressure, add rear toe-in
Wheelspin on corner exit	Increase accel diff lock, soften rear springs, shorter gearing
Car bounces over bumps	Soften springs, reduce bump damping, increase ride height
Slow top speed on straights	Lower final drive ratio, reduce aero, increase tire pressure
Poor braking stability	Increase decel diff lock, add rear toe-in, reduce rear ride height
Car feels sluggish in corners	Shorten gear ratios, increase front camber, stiffen springs

Pro Tuning Tips

Change one thing at a time. Adjust a single parameter, do a test lap, evaluate. Five sliders at once tells you nothing.

Use Rivals mode for testing. Pick a short circuit, load your ghost, and compare lap times after each adjustment.

Save multiple tunes per car. Build road, dirt, and speed setups. Swap based on event. One car, three setups.

PI cost matters. Some upgrades add more PI than they're worth. A perfectly tuned A800 beats a badly tuned S1 900.

🎯 Quick Tuning Reference by Class

Class	Tire Pressure	Gearing	Camber (F/R)	ARB (F/R)	Springs	Ride Height	Diff (Accel/Decel)
S2 (901–998)	30–32 PSI	Speed-focused, 5.0+ final	−1.2°/−0.8°	35/30	Stiff, 150+ kgf/mm	Lowest	70%/30%
S1 (801–900)	29–31 PSI	Balanced, 4.5 final	−1.0°/−0.6°	30/28	Medium-stiff	Low	60%/25%
A (701–800)	28–30 PSI	Accel-biased, 4.2 final	−0.8°/−0.5°	28/25	Medium	Mid-low	50%/20%
B (601–700)	27–29 PSI	Short, 3.8 final	−0.5°/−0.3°	25/22	Soft-med	Mid	40%/15%
C/D (100–600)	26–28 PSI	Very short, 3.5 final	−0.3°/−0.2°	22/20	Soft	High	30%/10%

🔗 Related Guides

🚦 Drag Racing Tuning — Launch, gearing & tire setups per class ⚙️ AWD vs RWD — Drivetrain choice for drag racing 💨 Drifting Guide — Best cars, tunes & 3-star tips 🏁 Best Cars by Race Type — Pick the right car for every event

Data sources: Xbox Game Studios / Playground Games — official Forza Horizon 6 announcements; in-game tuning telemetry data; community lap time benchmarks from Forza Horizon 5 (tuning model carries forward to FH6).

FH6 Tuning Guide — Master Every Adjustment