When selecting the perfect rims for your vehicle, it’s crucial to ensure they fit correctly. Three important measurements that determine fitment are PCD, ET, and CB. Here’s a breakdown of what these terms mean and why they matter.

PCD (Pitch Circle Diameter)

PCD stands for Pitch Circle Diameter. It refers to the diameter of the circle that passes through the center of all the wheel bolts or studs. This measurement is usually given in millimeters and is crucial for ensuring that the wheel fits onto the hub correctly.

How to Read PCD: PCD is expressed as the number of bolts/studs x the diameter of the circle. For example, a PCD of 5×114.3 means there are 5 bolts/studs and the diameter of the circle passing through these bolts is 114.3 mm.

Why PCD Matters: If the PCD does not match your vehicle’s specifications, the wheel won’t mount properly, leading to potential safety issues.

ET (Offset)

ET, or offset, is the distance between the wheel’s mounting surface and its centerline. It’s measured in millimeters and can be positive, negative, or zero.

Positive Offset: The mounting surface is closer to the outside edge of the wheel. Common in most front-wheel-drive cars.

Negative Offset: The mounting surface is closer to the inside edge of the wheel. Often found in rear-wheel-drive vehicles.

Zero Offset: The mounting surface is in line with the centerline of the wheel.

Why ET Matters: The offset affects the position of the wheel in the wheel well. Incorrect offset can cause the wheel to sit too far in or out, leading to issues like rubbing on the suspension or bodywork, poor handling, and uneven tire wear.

CB (Center Bore)
CB stands for Center Bore, the diameter of the hole in the center of the wheel that fits over the hub of the car.

How to Measure CB: The center bore is measured in millimeters and must match the hub size of your vehicle.

Why CB Matters: A proper center bore ensures that the wheel is perfectly centered on the hub, which is essential for a smooth ride and proper wheel balancing. Using hub-centric rings can help if the center bore is too large for your vehicle’s hub.

How to Ensure Correct Fitment?

Check Your Vehicle’s Specifications: Refer to your vehicle’s manual or look up the specifications online to find the correct PCD, ET, and CB for your car.

Measure Your Current Wheels: If you’re unsure, measure the PCD, offset, and center bore of your current wheels.

Consult with Professionals: If in doubt, contact our expert team at JDMRim. We’re here to help you find the perfect fit for your vehicle.
Why Choose JDMRim?

At JDMRim, we specialize in providing high-quality rims that not only enhance the aesthetics of your vehicle but also ensure a perfect fit. Our extensive range includes options to match various PCD, ET, and CB requirements, ensuring you find the ideal rims for your car.

Wide Selection: Browse our vast inventory of rims suitable for different makes and models.
Expert Advice: Our knowledgeable staff can guide you through the selection process.
Quality Assurance: We ensure all our rims meet the highest standards of quality and safety.
Contact Us
Have questions or need assistance? Contact our team today, and we’ll help you find the perfect rims for your vehicle.
Email: contact@jdmrim.com