Car Tuning Car Tuning Wheel and Tire Upgrades

Question 1

What does the term 'plus sizing' refer to when upgrading wheels?

Accepted Answer

Increasing wheel diameter while keeping overall tire diameter the same

Answer

Increasing both wheel diameter and overall tire diameter

Answer

Increasing tire width only

Answer

Increasing wheel offset only

Question 2

What does 'ET' or 'offset' indicate on a wheel specification?

Accepted Answer

The distance in millimeters from the wheel's centerline to its mounting face

Answer

The diameter of the wheel in inches

Answer

The weight rating of the wheel in pounds

Answer

The bolt pattern spacing in millimeters

Question 3

Which tire aspect ratio would give the shortest sidewall height on a 255mm wide tire?

Accepted Answer

255/30

Answer

255/40

Answer

255/50

Answer

255/65

Question 4

What is the primary risk of running a wheel with excessive positive offset on a front-wheel-drive car?

Accepted Answer

Increased stress on wheel bearings and inner fender rubbing

Answer

Reduced brake rotor clearance

Answer

Decreased tire traction

Answer

Loss of power steering assist

Question 5

What is the purpose of hub-centric wheel rings (hub rings)?

Accepted Answer

To fill the gap between the wheel center bore and the vehicle hub for vibration-free fitment

Answer

To increase the wheel's load rating

Answer

To prevent wheel studs from loosening

Answer

To adapt a 5-lug wheel to a 4-lug hub

Question 6

What is the recommended practice after installing aftermarket wheels regarding lug nut torque?

Accepted Answer

Re-torque the lug nuts after the first 25–50 miles of driving

Answer

Only torque them once at installation

Answer

Use threadlocker on the studs

Answer

Torque them 20% above the factory spec