Forged Bronco Rims: Fitment Specs for the Ford Bronco

The market is flooded with bronco rims built to a generic multi-fit bore, and a truck this capable deserves better than a wheel that centers on its lug nuts instead of its hub. At ANKUSI we forge every wheel from a single block of 6061-T6 and machine it to your Bronco’s exact bolt pattern, bore and offset. Here are the real factory numbers first, then how to choose, and why the wheel you bolt on should be forged, not cast.

Factory Ford Bronco rims: the real numbers

The sixth-gen Bronco (2021 and up) runs a 6×139.7 six-lug bolt pattern on a 93.1 mm center bore. Factory ford bronco rims range from a 16×7 steel wheel on base trims up to 17×7.5, 17×8 and the wide 17×8.5 that comes under the Sasquatch package, plus an 18×7.5 on some trims. Offset is where it gets interesting: most ford bronco wheels sit at a high +53 to +57 mm, but the 17×8.5 Sasquatch wheel drops to +28 to +32 mm to clear the 315/70R17 35-inch tire. That offset gap is exactly why picking new bronco wheels by looks alone gets people in trouble — the number has to match your suspension and fender clearance, not just the diameter. Stock tire fitments run from 255/70R18 on the street-leaning trims to the LT315/70R17 mud-terrains on Sasquatch.

Bronco vs Bronco Sport: do not mix up the rims

This is the mistake we see most often. The Bronco and the Bronco Sport are completely different trucks under the skin, and their wheels do not swap. Full-size Bronco is body-on-frame with that 6×139.7 pattern. The Bronco Sport is a unibody crossover built on the Escape platform, so bronco sport rims use a 5×108 five-lug pattern on a 63.4 mm bore — a different lug count, a different bore, a different wheel entirely. If you are shopping for bronco sport wheels, ignore anything listed for the big Bronco. When you order ford bronco sport rims from us we forge to the 5×108 spec; for the full-size truck we forge to 6×139.7. Same billet, same process, two different fitments that must not be confused.

Sizing your Bronco rims and tires

For a truck that actually sees dirt, 17-inch bronco wheels are the enthusiast default, and the factory Sasquatch setup proves the point. A 17-inch wheel leaves room for a tall, aired-down all-terrain or mud-terrain, which is what you want when the trail turns to rock. Thinking about bronco rims and tires as one package matters here: a wider 17×8.5 at a lower offset fills the arch and supports a 35, while a narrower, higher-offset wheel keeps a 33 tucked in tight with less rub. Go up to 18s if the Bronco is mostly a daily and you want a slightly firmer on-road feel, but most owners who actually wheel their truck land on 17s.

Forged vs cast: why it matters on a trail rig

Search around and you will see the usual off-the-shelf names — fuel wheels for bronco and similar cast or flow-formed options. For a mild build they are fine. The gap opens when the Bronco is running 35s, a winch, and getting used hard. A cast wheel has a coarser grain and has to be built thick to stay strong, so it carries weight where it hurts most: unsprung, out at the corner. Our wheels start as solid billet compressed under a 10,000-ton press, so the grain runs continuously through the spoke instead of the microscopic voids casting leaves behind — that lets us run thinner, stronger sections that cut weight and raise impact resistance at the same time. On a heavy trail rig, lighter bronco wheels mean sharper steering, better braking and a wheel that takes a rock hit without cracking.

We can hold that Sasquatch-spec offset tight because we control the entire process ourselves. ANKUSI forges, machines and finishes every wheel in-house at our Guangzhou factory — no subcontracted casting, no outsourced machining — under IATF 16949 and ISO 9001 quality systems, tested to JWL/VIA and DOT standards with TÜV/SFI compliance available on request. At over 120,000 wheels a year, that is a real production factory behind every set, not a reseller relabeling someone else’s casting.

Finishes: black Bronco rims and beyond

Black bronco rims are the obvious choice, and for good reason — a satin or matte black wheel frames an all-terrain tire, hides trail rash, and looks right against every factory Bronco color from Cactus Grey to Cyber Orange. If you want contrast we also cut bronze, gunmetal, brushed and two-tone finishes in-house. Because the finish goes on a wheel already machined for your truck, you never trade fitment for the look you are after.

Getting the right Bronco rims for your build

Know your truck first: full-size Bronco is 6×139.7 on a 93.1 mm bore, Bronco Sport is 5×108, and they do not share wheels. Pick a diameter around how you use the truck, then choose an offset that clears your suspension and tire without rubbing. Our Ford Bronco fitment guide lays out bolt pattern, bore and offset, and our off-road forged wheel series shows the sizes and finishes we build for rigs like yours. Every set is forged from 6061-T6 and cut to order, so nothing is left to a generic bore. When you are ready to spec a set of forged bronco rims, contact us for a factory-direct quote with your year and trim and we will confirm every number before we cut metal.