How to Pick and Fit the Right Wheels for Your Build

Wheels can make or break the look of a custom build. Get the size, style, and fitment right, and your build looks like it rolled straight out of a magazine feature. Get it wrong, and even the best paint job and drivetrain won't save the stance.

At Smithson Speed Parts, we carry wheels from three of the most trusted names in the hot rod and restomod world — Billet Specialties, American Racing, US Mags and Schott Wheels. Here's how to think through your choice so you land on wheels that fit right, handle well, and match your build's personality.

Start With Fitment, Not Looks

It's tempting to shop by style first, but fitment issues are the number one reason wheels end up back in a box. Before you fall in love with a design, nail down these four numbers:

• Bolt pattern – Must match your hub exactly (common patterns include 5x4.5", 5x4.75", and 5x5")
• Wheel diameter and width – Affects tire selection and overall stance
• Backspacing – Determines how far the wheel sits into the wheel well; critical for brake caliper and suspension clearance
• Offset – Works with backspacing to control how much the wheel pokes out from the fender

If you've already upgraded to a front brake kit or rear brake kit, double-check backspacing against your new caliper size before ordering wheels. Big brake kits are one of the most common causes of wheel-to-caliper rub on restomods — as the Billet Specialties Speedway spec sheet shows, even a half-inch difference in backspacing can be the difference between 1.25" of caliper clearance and 0.50".

Billet Specialties: Two Series, Two Different Builds

We stock two Billet Specialties lines, and which one you want depends on your budget and how much brake clearance you need:

• Speedway Wheel – Billet Specialties' more affordable cast wheel, available in 18–22" diameters with multiple bolt patterns and backspace options. The 18x7, 18x8, and 20x8.5 sizes give 1.25" of caliper clearance, while the deeper-backspace 20x10 and 22x10 options drop that to 1.00" or 0.50" for a tucked-in look with less lip.
• Tec Series Wheel – A two-piece cast wheel built to a tighter standard, currently offered in black finishes up to 22x10. If you're running big brakes and want more assurance on fitment quality, this is the step up from Speedway.

Best for: Traditional hot rods, street rods, and C10-style trucks where a clean five-spoke or smoothie look is the goal.

American Racing: The Original Muscle Car Wheel

American Racing has been on muscle cars and street machines since the 1950s, and the Torq Thrust design is arguably the most recognized wheel in the hot rod world — that classic 5-spoke with a mag gray center and machined lip. It's available in polished, chrome, and gray/black finishes depending on the size, so you can match a period-correct look or a more modern two-tone.

Best for: Muscle car restorations, Pro Touring builds, and anyone wanting an iconic look that photographs well.

US Mags: Bigger, Bolder, More Aggressive

US Mags leans into deeper lips and more aggressive spoke designs. The Indy wheel, for example, brings a slotted, race-inspired look pulled from IndyCar and Trans-Am styling — a strong choice if your restomod is leaning Pro Touring rather than traditional hot rod. It's currently available in a 17x9 polished fitment with a 5x5.5 bolt pattern and 3.54" backspace.

Best for: Restomod trucks, full-size restomods, and Pro Touring builds wanting a bolder, more modern stance.

Matching Wheels to Your Build's Purpose

Ask yourself what the car is actually for before finalizing wheel choice:

• Show car or cruiser – Prioritize classic styling and polished finishes (Billet Specialties, American Racing)
• Pro Touring or autocross – Prioritize lighter weight and wider fitment for grip (American Racing, US Mags)
• Daily-driven restomod – Prioritize durability and finish options that hide brake dust and road grime

A Quick Fitment Checklist Before You Order

1. Confirm bolt pattern matches your hub or rear end
2. Measure backspacing needed based on brake caliper and suspension clearance
3. Decide on diameter based on tire selection and brake upgrade plans
4. Check finish compatibility with your build's color scheme and other trim
5. When in doubt, call it in — wheel fitment mistakes are expensive to reverse

Verified Fabrication's wheel fitment tools

Shop Wheels at Smithson Speed Parts

Whether you're running a numbers-matching restoration or a full Pro Touring build, we stock Billet Specialties, American Racing, US Mags and Schott Wheels to match. Once your wheels are mounted, a good wheel and tire cleaner will keep brake dust from eating into polished or machined finishes.

Have questions about backspacing or bolt pattern for your specific build? Contact our team — we're happy to help you get it right the first time.