If you’re thinking about how to upgrade car rims, you’re looking at one of the most effective ways to personalize your vehicle. Upgrading your car’s rims changes its appearance and requires careful attention to specifications like bolt pattern and offset. This guide will walk you through the entire process, from understanding why you might want new wheels to the final installation steps.
New rims can improve handling, reduce unsprung weight, and completely refresh your car’s look. But doing it wrong can lead to safety issues and poor performance. We’ll cover everything you need to know to make a smart upgrade.
How To Upgrade Car Rims
This section outlines the core process. Upgrading rims is more than just picking a style you like. It involves matching technical specs, choosing the right materials, and ensuring a proper fit. Following a methodical approach saves you time, money, and frustration.
Understanding Rim Specifications And Fitment
Before you even look at designs, you must understand your car’s specific requirements. Getting the fitment wrong means the wheels won’t mount correctly or could interfere with your brakes and suspension.
Bolt Pattern (PCD)
The bolt pattern is the number of bolts and the diameter of the circle they form. A common pattern is “5×114.3,” meaning five bolts on a 114.3mm circle. This must match your vehicle’s hub exactly.
- Count the number of lug nuts or bolts on your current wheel.
- Measure the distance between opposite studs (for even-numbered patterns) or use a specific PCD gauge.
- You can also check your owner’s manual or the manufacturer’s sticker inside the driver’s door jamb.
Wheel Offset
Offset is the distance from the wheel’s mounting surface to its centerline. It determines how far in or out the wheel sits in the wheel well.
- Positive Offset: The mounting surface is toward the front (outer face) of the wheel. Common in front-wheel-drive cars.
- Negative Offset: The mounting surface is toward the back (inner barrel) of the wheel. Often seen on trucks and rear-wheel-drive performance cars.
- Zero Offset: The mounting surface is exactly at the centerline.
Using an offset too far from your car’s original specification can cause the tire to rub against the fender or suspension components.
Center Bore
This is the hole in the center of the wheel that fits over the vehicle’s hub. Hub-centric wheels have a center bore that matches your car’s hub diameter precisely, which helps center the wheel correctly. If the aftermarket wheel’s center bore is larger, you will need hub-centric rings to fill the gap and prevent vibration.
Rim Width and Diameter
You need to choose a width and diameter that fits within your wheel well and matches your tire size. A wider rim can provide a better footprint for performance tires but may require fender modifications. Increasing the diameter means you’ll use a lower-profile tire to maintain the overall tire diameter and keep your speedometer accurate.
Choosing The Right Rim Material
The material affects weight, strength, cost, and appearance. The three main types are alloy, steel, and forged.
- Alloy Wheels: Made from aluminum or magnesium alloys. They are lighter than steel, which improves handling and acceleration. They also offer better heat conduction from brakes. Most aftermarket wheels are alloy.
- Steel Wheels: Heavier and stronger, typically used as winter wheels or base model wheels. They are less expensive but are usually not chosen for aesthetic upgrades.
- Forged Wheels: These are high-performance alloy wheels that are forged under extreme pressure. They are very strong and lightweight but come at a premium price. They are common in racing and high-end sports cars.
Selecting A Style And Finish
This is the fun part where you get to express your style. Consider your car’s color and body lines when choosing.
- Spoke Design: From classic mesh to modern multi-spoke or deep-dish styles.
- Finish: Options include painted, machined, chrome-plated, or powder-coated. Powder coating is durable and offers many color choices. Remember that some finishes, like chrome, require more maintenance to prevent corrosion.
Step-By-Step Installation Guide
Once you have your new rims and correct tires, it’s time for installation. You can do this yourself with the right tools and safety precautions, or have a professional do it.
Gather Necessary Tools and Equipment
- Jack and jack stands (never rely on the jack alone)
- Lug wrench or torque wrench (essential for proper tightening)
- New rims with properly mounted and balanced tires
- Hub-centric rings (if required)
- New lug nuts or bolts (if your new rims require a different style)
Secure The Vehicle and Remove Old Wheels
- Park your car on a level, solid surface and engage the parking brake.
- Loosen the lug nuts on the old wheels slightly before lifting the car.
- Lift the vehicle with the jack and place jack stands under designated lift points for safety.
- Fully remove the lug nuts and carefully pull the old wheel off the hub.
Mount and Torque The New Wheels
- Clean the hub surface to remove any rust or debris that could affect mounting.
- If using hub-centric rings, place them into the back of the new wheel’s center bore.
- Lift the new wheel and tire assembly onto the hub, aligning the bolt holes.
- Hand-tighten the new lug nuts or bolts in a star pattern to ensure the wheel sits evenly.
- Lower the vehicle so the tires just touch the ground but the full weight isn’t on them.
- Using a torque wrench, tighten the lug nuts to the manufacturer’s specified torque in a star pattern. Do not over-tighten, as this can warp the brake rotor.
Post-Installation Checks
After installation, a few important checks are necessary to ensure safety and performance.
- Drive slowly at first and listen for any unusual noises like rubbing or scraping.
- Check the lug nut torque again after driving about 50-100 miles, as they can settle.
- Get a professional alignment. Changing wheel dimensions can affect your car’s alignment settings, leading to uneven tire wear.
Common Mistakes To Avoid When Upgrading Rims
Many enthusiasts make simple errors that cost them later. Being aware of these pitfalls will help you avoid them.
Ignoring Load Rating And Speed Rating
Every wheel has a load rating, which is the maximum weight it can safely support. Your new wheels must meet or exceed the load rating specified for your vehicle. Similarly, the wheel’s construction should be suitable for your car’s top speed. Never sacrifice safety for style.
Forgetting About TPMS Sensors
Most modern cars have a Tire Pressure Monitoring System (TPMS). When you change wheels, you need to transfer the existing sensors to the new rims or purchase new ones. If you don’t, you’ll have a constant warning light on your dashboard. A tire shop can handle this during mounting and balancing.
Not Considering Brake Clearance
Larger brake calipers, especially aftermarket performance kits, may not fit inside some wheel designs. Check the wheel’s inner barrel clearance. Many manufacturers list which big brake kits their wheels are compatible with. It’s a good idea to do a test fit before finalizing your purchase.
Mixing Different Wheel Sizes Incorrectly
Some performance cars use a staggered setup, with wider wheels in the rear than the front. If you choose this route, you must ensure the front and rear wheel specifications are correct for your car’s drivetrain and suspension geometry. An incorrect staggered setup can upset the car’s balance.
Cost Considerations And Budgeting
Upgrading rims involves several costs beyond the wheels themselves. Planning your budget upfront prevents surprises.
Price Breakdown Of A Typical Upgrade
- Wheels: This is your largest cost, ranging from a few hundred for basic alloys to several thousand for forged sets.
- Tires: You will likely need new tires unless you are keeping the exact same diameter and width. Performance tires add significant cost.
- Mounting and Balancing: A shop typically charges per tire for this service, which is crucial for a smooth ride.
- TPMS Sensors: New sensors can cost $50-$100 each.
- Alignment: A full four-wheel alignment is highly recommended after the change.
- Accessories: Hub-centric rings, new lug nuts, or wheel locks.
Buying New Vs. Used Rims
Buying used rims can save you a lot of money, but you must be cautious.
- Inspect for any cracks, bends, or significant curb rash. Minor cosmetic scratches can often be repaired.
- Verify all specifications match your car exactly before paying.
- Ensure the seller includes all necessary center caps and hardware.
Maintenance For Your New Rims
To keep your new investment looking good and functioning well, regular maintenance is key. Different finishes require different care.
Regular Cleaning Practices
Brake dust is corrosive and can damage wheel finishes if left on too long. Clean your wheels regularly with a pH-balanced wheel cleaner and a soft brush. Avoid harsh abrasive cleaners, especially on polished or chrome finishes. Always rinse thoroughly.
Protective Coatings
Consider applying a ceramic wheel coating or a high-quality sealant. This creates a barrier that makes brake dust easier to clean off and protects the finish from UV damage and contaminants. It’s a worthwhile investment for expensive wheels.
Seasonal Care For Winter
If you live in an area with road salt, it’s highly advisable to have a separate set of inexpensive winter wheels. Salt is extremely corrosive and can quickly ruin the finish of nice alloy wheels. If you must use your new rims year-round, clean them more frequently during winter months.
Frequently Asked Questions
Can I Upgrade My Rims To A Larger Size?
Yes, you can increase your rim diameter, often called “plus-sizing.” The key is to maintain the overall tire diameter. You do this by choosing a lower-profile tire. For example, you might replace a 16-inch wheel and tire with a 18-inch wheel and a tire that has a shorter sidewall. This keeps your speedometer accurate and prevents clearance issues. Always check for fitment before buying.
How Do I Know What Bolt Pattern My Car Has?
The most reliable ways are to check your vehicle’s owner’s manual, look for a specification sticker inside the driver’s door frame, or measure it directly. To measure, count the number of lugs. For a 4, 6, or 8-lug pattern, measure the distance between the centers of two opposite studs. For a 5-lug pattern, measure from the center of one stud to the back of the farthest stud.
What Is The Difference Between Offset And Backspacing?
Offset and backspacing both describe how the wheel mounts to the hub, but they are measured differently. Offset is the distance from the wheel’s centerline to the mounting surface. Backspacing is the distance from the inner edge of the wheel to the mounting surface. Wheel manufacturers typically use offset, while the truck community often references backspacing. They are related but not the same measurement.
Do I Need An Alignment After Changing Rims?
It is strongly recommended. While changing the wheels and tires themselves does not directly alter alignment angles, any change in tire diameter or width can affect how the car sits and handles. Furthermore, if you are changing suspension components at the same time, an alignment is absolutely necessary to ensure even tire wear and proper handling.
Can I Install New Rims Myself?
If you have basic mechanical skills, the correct tools, and follow safety procedures, you can install them yourself. The critical steps are safely supporting the vehicle with jack stands and properly torquing the lug nuts with a torque wrench. However, tasks like transferring TPMS sensors, mounting and balancing tires, and performing an alignment should be left to a professional tire shop for best results.