Understanding Offset, Backspacing, and Hub Bore: What These Wheel Specs Really Mean
When you’re shopping for new wheels, you’ll come across terms like offset, backspacing, and hub bore. They might sound technical, but these specs play a huge role in how your wheels fit, perform, and look on your vehicle. Whether you’re upgrading your truck, SUV, or car, knowing what these terms mean can help you avoid costly fitment issues and achieve the exact stance and performance you want.
1. What Is Wheel Offset?
Offset refers to how the mounting surface of the wheel relates to its centerline. In simple terms, it determines how far the wheel sticks out or tucks in toward the suspension and fenders. Offset is measured in millimeters.
There are three main types of offset:
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Positive Offset: The mounting surface is closer to the front of the wheel. This is common on most factory and newer vehicle wheels and keeps the wheels tucked under the fenders.
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Negative Offset: The mounting surface is closer to the back of the wheel, pushing the wheel outward for a wider, more aggressive stance. This is often seen on lifted trucks or off-road setups.
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Zero Offset: The mounting surface sits exactly in the middle of the wheel, providing a balanced fitment between inner and outer clearance.
Getting offset right ensures your wheels don’t rub against the fenders, brakes, or suspension components — and that your ride looks exactly how you want it.
2. What Is Backspacing?
Backspacing is the distance from the wheel’s mounting surface to the inner edge (lip) of the wheel. It’s usually measured in inches and helps determine how much clearance your wheel and tire will have from your suspension or brakes.
A higher backspacing number means the wheel sits further inward (closer to the suspension), while a lower backspacing number pushes the wheel outward.
Offset and backspacing are closely related — changing one affects the other. Our team uses both measurements to ensure proper fitment when pairing wheels and tires for your specific make and model.
3. What Is Hub Bore?
The hub bore (also called center bore) is the size of the hole in the center of the wheel that fits over the hub on your vehicle. It’s measured in millimeters and ensures that the wheel sits perfectly centered on the hub.
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Hub-centric wheels have a bore that matches the vehicle’s hub exactly, creating a snug, vibration-free fit.
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Lug-centric wheels rely on the lug nuts to center the wheel.
Having the correct hub bore prevents vibration at higher speeds and helps distribute the vehicle’s weight evenly across the wheel.
Why These Measurements Matter
Getting these three specs right isn’t just about appearance — it’s about safety, handling, and performance. The wrong offset or backspacing can cause rubbing, uneven tire wear, or even damage to your suspension. The wrong hub bore can lead to vibrations or poor balance.
At EZDealin Wheels & Tires, we specialize in helping customers find the perfect fitment — every time. Whether you’re going for a flush, lifted, or wide stance, our experts make sure your new wheels not only look great but perform perfectly for your vehicle.
Ready to Upgrade Your Ride?
We carry a wide range of wheels and tires in all sizes, styles, and offsets — including popular options like Chrome, Gloss Black, Satin Black, and Machined finishes. Our team can mount and balance your new set before shipping, so they arrive ready to install.
Find your perfect wheels today at EZDealin.com or call 877-247-2230 to talk to one of our fitment specialists!