Dual rear wheel — DRW, or just "dually" — trucks are built for payload and towing capacity beyond what a single rear wheel per side can support. That extra capacity comes from doubling up the rear wheels, and that one change ripples through everything about how you shop for dually wheels: wheel count, bolt pattern, offset, and how the set has to be ordered.
What DRW actually means
On a single rear wheel (SRW) truck, each rear axle end carries one wheel and tire. On a DRW truck, each rear axle end carries two wheels and tires mounted side by side, doubling the tire contact patch and load rating at the back axle. This is standard on Ford F-350 DRW, F-450, and F-550, and on GM/Chevrolet 3500HD DRW configurations. The front axle still runs one wheel per side, just like an SRW truck.
Why a dually set is six wheels, not four
Because of that doubled rear axle, a full dually wheel set is six wheels: two front and four rear (two per side). This trips people up when they're used to buying a standard set of four for an SRW truck or SUV. Within those four rear wheels, some wheel designs use an identical wheel for the inner and outer rear position — same offset, mountable either way — while others use two distinct parts: a rear outer with different backspacing and sometimes a different face design than the rear inner, because the inner wheel sits closer to the axle and brake components and needs different clearance.
| Position | Quantity | Notes |
|---|---|---|
| Front | 2 | Same as SRW front wheel design in most cases |
| Rear outer | 2 | Faces outward; offset set for clearance from the fender and from the rear inner wheel |
| Rear inner | 2 | May be identical to the rear outer or a distinct part depending on the wheel design |
Rear bolt patterns by platform
DRW trucks generally use a different bolt pattern than their SRW counterparts on the same platform, and the pattern varies by manufacturer and by chassis rating. Confirming this is a prerequisite before shopping wheels, and it's worth reviewing What Is a Bolt Pattern? if you need the basics first.
| Platform | Rear bolt pattern | Shop |
|---|---|---|
| Ford F-350 DRW | 8x200 | 8x200 wheels |
| GM/Chevrolet 3500HD DRW | 8x210 | 8x210 wheels |
| Ford F-450 / F-550 | 10x225 | 10x225 wheels |
These patterns are specific to the rear axle on DRW trims — they are not the same as the 8x170 pattern used on Ford Super Duty SRW trucks or the 8x180 pattern on GM 2500/3500HD SRW trucks. Buying front wheels sized for the rear bolt pattern, or vice versa, is one of the more expensive mistakes to make on a dually order, since front and rear wheels on the same truck are not interchangeable in either pattern or offset.
Why you buy dually wheels as a matched kit
Because the front, rear outer, and (where applicable) rear inner wheels differ in offset, backspacing, and sometimes bolt pattern hardware, dually wheels are sold and priced as a matched set rather than mixed and matched piece by piece the way a standard four-wheel set sometimes is. Mixing wheels from different product lines across those positions risks tire-to-tire clearance issues between the dual rears, uneven stance, or lug hardware that doesn't match seat type across positions. If you're assembling a set, use the package builder or shop by vehicle to keep all six wheels tied to one confirmed configuration rather than piecing it together from separate listings.
Rear tire spacing and clearance
The gap between the two rear tires on each side is set by the combined offset of the inner and outer wheels and has to clear the tire sidewalls under full articulation and at max steering angle up front (where the front tire has to clear the fender and suspension components, a separate but related check). Too little spacing between the dual rears causes the tires to rub each other under load or on rough roads; too much can push the outer tire beyond the fender line. This is exactly why rear inner and outer wheels are frequently different parts rather than a single reversible design — the spacing has to be engineered per axle, not assumed.
Why dually programs are often built to order
Dually trucks are a smaller share of the market than SRW trucks and SUVs, and a proper dually wheel program has to stock (or produce) three distinct wheel parts instead of one, in bolt patterns that don't overlap with high-volume SRW patterns. That combination means many dually wheel and tire packages are configured and built to order around your specific truck rather than pulled from a one-size set sitting on a shelf. Expect to confirm year, make, model, and trim when you shop by vehicle, since dually results are flagged "Potential Match — Fitment Not Yet Verified" until that detail is confirmed against your exact rear axle configuration.
How dually sets are priced here
Dually pricing on this site is structured around the real parts count: two front wheels plus four rear wheels, which on some wheel designs breaks down further into two rear outer and two rear inner wheels as distinct line items. That's different from a standard set of four, and it's worth confirming that breakdown on any dually listing before you check out, so the quantities you're ordering match the six physical wheel positions on the truck. See the Wheel & Tire Package Guide for how packages are assembled more generally, including how tire sizing and add-ons work once the wheel set itself is settled.