How to Create Custom Handling in GTA 5 - Vehicle Physics Guide 2026

Custom Handling in GTA 5 — Vehicle Physics Guide 2026

The handling.meta file controls every aspect of vehicle physics in GTA 5 — from top speed and acceleration to suspension, traction, and braking. Learn how to create and modify handling for any vehicle.

Editing Handling.meta

1. Open OpenIV and navigate to mods/update/update.rpf/common/data/
2. Find handling.meta and export it
3. Open in a text editor (Notepad++ recommended)
4. Find your vehicle by searching for its handlingName (e.g., SULTAN)
5. Modify the desired parameters
6. Save and import back into the RPF archive
7. Test in-game and iterate

Key Physics Parameters Explained

• fMass — heavier vehicles feel more stable but accelerate slower
• fInitialDriveForce — higher values = faster acceleration, too high = unrealistic
• fDriveInertia — how quickly RPM changes, affects throttle response
• fTractionCurveMax/Min — grip range; Max is grip at optimal slip, Min is at full lock
• fTractionBiasFront — 0.5 = equal grip, lower = more rear grip, higher = more front
• fSuspensionCompDamp — compression damping, affects bump absorption

Handling Presets by Type

• Sports Car: low mass (1400), high drive force (0.35), high traction (2.5), stiff suspension
• Drift Car: low rear traction bias (0.44), reduced traction curve, higher inertia
• Off-Road: high suspension travel, soft springs, high ground clearance
• Heavy Truck: high mass (8000+), low drive force, soft but long suspension

Testing Tips

• Use Simple Trainer to spawn the vehicle instantly after each edit
• Test on different surfaces — road, dirt, grass, wet
• Check behavior at different speeds — low speed handling vs high speed stability
• Compare to real-world specs if aiming for realism
• Small changes (0.01-0.05) can have big effects — adjust incrementally