Modified vehicle alignment: angles, load, and the GeoWheels workflow
After a lift, lowering springs, track-width changes, or wheel/tyre changes, OEM alignment sheets are no longer enough. This guide explains what changes physically and how GeoWheels helps you prepare realistic targets before rack verification. How alignment varies by use case ties these ideas to real goals.
GeoWheels workflow
Start with region/country/language, then vehicle profile, intended use, suspension layout, dimensional changes, spring type, and real-world load. Finally, compare target values against rack data and export the report as PDF.
Suspension architectures recognised
The app supports MacPherson, double wishbone, multi-link, torsion beam, and solid axle layouts front and rear. You can use assisted identification or set them manually.
Spring type and compression behaviour
OEM, lift-kit, progressive, coilover, and sport-lowering springs each compress differently under load. That changes effective ride height and therefore static alignment angles.
Vehicle load model
GeoWheels accounts for occupants, cargo, and expedition equipment with front/rear distribution. For utes and utility use, include realistic curb weight, payload, and permitted gross mass for your jurisdiction. See the ute, load & canopy case for how permanent mass affects the rear axle.
Use profiles
Daily street, spirited road, track, drift, and 4WDing profiles do not share one universal setup. The app adjusts the alignment objective around your actual use case. Examples: sport sedan / coupe, 4×4 / 4WDing.
Geometry principles (quick refresher)
Ride-height changes move control-arm operating angles, which shifts camber/toe/caster behaviour under load. Wheel offset and width also alter scrub radius and steering feel.
Comparison table (illustrative only)
| Modification | Camber trend | Toe trend | Caster / steering | Tyre wear risk | Typical action |
|---|---|---|---|---|---|
| +50 mm lift | Often more positive | Platform-dependent | May reduce caster | Outer shoulder | Rack check + correction parts |
| Lowering springs | More negative | Toe drift likely | May increase | Inner shoulder | Re-align with real load |
| Track spacers / offset change | Usually small static effect | Must be rechecked | Scrub-radius shift | Feathering | Wheel-by-wheel toe calibration |
GeoWheels calculation engine
The app combines profile + suspension + ride-height delta + track delta + spring type + load + optional rack sheet input. Outputs include recommended targets, tolerances, and deltas vs stock.
Typical cases
SUV with lift: correct toe/camber drift after larger tyres and added load.
Lowered sedan: avoid inner-edge wear and unstable braking behaviour.
Variable-load ute: compare empty vs loaded targets in separate saved setups.
Platform-specific guidance
Use profile-specific defaults as a starting point, then verify against your exact hardware. Visual confirmation and alignment-rack measurement remain mandatory after modifications.
Other useful features
- VIN decoding (US/CA support where available)
- Regional model catalogs
- AI rack-sheet scan
- Metric/imperial units
- Multiple saved setups