Scrub Radius
Scrub radius is the distance between the steering axis and the tyre contact centre at the ground.
What is Scrub Radius?
It affects steering feel. Wheel offset changes it. Many cars have a small negative value. A negative scrub radius helps keep the car straight when one front tyre has more grip than the other under braking or after a puncture. Fitting wheels with a very different offset changes the scrub radius and can make steering heavy, nervous or sensitive to road ruts.
How it works
Geometry sets how forces act on the steering.
Why it matters for your car
Wrong wheels can change behaviour. It affects braking stability.
Other terms
- Battery Registration (Battery Coding)
- Car Restoration
- Crash Test Dummy
- Crosswind Assist
- DC-DC Converter
- DOT Code (Tyre Date Code)
- Dual-clutch Transmission (DCT)
- Gasoline Particulate Filter (GPF/OPF)
- Headlight Condensation (Moisture In Headlights)
- i-Size Child Seats (UN R129)
- Ignition Coil
- Iron Fallout Remover
- NACS Connector (SAE J3400)
- OBD Mode 6 Data (On-board Test Results)
- Rear-wheel Steering (Four-wheel Steering)
- Torque Converter
- Transverse Engine
- V12 Engine
- V6 Engine
- Wire Wheels (Spoked Wheels)