Choosing a set of 8x6 5 dually wheels 20 is one of those upgrades that completely transforms a truck from a basic workhorse into a total showstopper. If you've spent any time looking at heavy-duty trucks lately, you know that the "big wheel" look isn't just for show trucks anymore. More and more guys are swapping out their factory 16-inch or 17-inch setups for something with a bit more presence, and the 20-inch diameter seems to be the sweet spot for most dually owners.
The 8x6.5 (or 8x165.1mm) bolt pattern is a classic. It's been the backbone of the heavy-duty world for decades, found on older Chevy and GMC 2500/3500 trucks, as well as plenty of Dodge and Ram models. Even though some manufacturers have moved on to different patterns, the 8x6.5 remains one of the most popular configurations for anyone doing a custom build or just trying to freshen up a reliable old rig. When you combine that legacy bolt pattern with a 20-inch wheel, you get a look that's modern but still feels rugged enough to get the job done.
Why 20-inch wheels are the sweet spot for duallys
You might be wondering why everyone seems to be obsessed with 20s. Back in the day, if you saw a dually with 20-inch rims, it was probably a dedicated pavement princess. But things have changed. Tire technology has come a long way, and now you can find plenty of load-rated tires that fit a 20-inch wheel without sacrificing your ability to tow a fifth-wheel or haul a heavy camper.
The main reason people go for the 8x6 5 dually wheels 20 setup is the balance between aesthetics and performance. A 20-inch wheel gives you a larger face to show off those intricate designs—whether you like the clean, polished look or a rugged matte black finish. At the same time, you still have enough sidewall on the tire to absorb bumps and protect the rim. If you go up to 22s or 24s, you start losing that cushion, and the ride can get pretty harsh. With 20s, you still get a truck that feels like a truck.
The look and the stance
Let's be real: duallys are wide. They have that aggressive "hips" look in the back that screams power. When you put a set of 20-inch wheels on there, it fills out the wheel wells much better than the stock wheels ever could. It gives the truck a more proportional look, especially if you've added a small leveling kit or a lift.
One thing to keep in mind is the offset. On a dually, you have the front wheels, the outer rear wheels, and the inner rear wheels. Most guys want that "deep dish" look for the outers, but you have to make sure everything lines up so your tires aren't rubbing together under a heavy load. It's a bit of a balancing act, but when it's done right, the stance is unbeatable.
Understanding the 8x6.5 bolt pattern
If you're shopping for 8x6 5 dually wheels 20, you've got to be sure your truck actually uses the 8x6.5 pattern. It's arguably the most famous 8-lug pattern out there. It was the standard for Ford until the late 90s, and it's been a staple for GM and Ram for a long time. However, newer Fords use a metric 8x170 pattern, and the newest GMs have moved to 8x180.
If you're rocking an older 1-ton Dodge or a classic Chevy Squarebody dually, the 8x6.5 is your bread and butter. It's a robust pattern designed to handle massive amounts of torque and weight. When you're looking at aftermarket wheels, you'll often see them listed as 8x165.1—don't let that confuse you. It's just the metric version of 8x6.5 inches. They are one and the same.
Compatibility with older trucks
One of the coolest things about this specific wheel size and bolt pattern is how it can modernize an older truck. You take a 90s-era dually that's still running strong, throw some 20-inch wheels on it with a fresh set of all-terrains, and suddenly it looks like it could roll off a showroom floor today. It's a great way to give an old workhorse a second life without having to spend $80,000 on a brand-new truck.
Choosing between forged and cast wheels
When you're browsing for 8x6 5 dually wheels 20, you're going to run into two main types: cast and forged. This is where you really need to think about how you use your truck.
Cast wheels are made by pouring molten aluminum into a mold. They are generally more affordable and come in a huge variety of styles. For most guys who use their trucks for daily driving and light towing, a high-quality cast wheel is more than enough. They're plenty strong and look great.
Forged wheels, on the other hand, are the gold standard. They are milled from a solid block of aluminum. This process makes them incredibly dense, strong, and light. If you're hauling heavy trailers across the country or you just want the absolute best of the best, forged is the way to go. They can handle higher load ratings and usually have a much higher-quality finish that stays shiny longer. The downside? They'll definitely put a bigger dent in your wallet.
The "Inner" wheel dilemma
Here's a tip that saves a lot of headaches: when you buy a dually wheel kit, pay attention to the inner rear wheel. Since the inner wheel is hidden behind the outer one, many people choose to run a plain steel inner wheel to save money. However, if you want to be able to rotate your tires properly, some folks prefer having all aluminum wheels. Just remember that if you go with a 20-inch outer, your inner has to be a 20-inch too. You can't mix and match diameters on the same axle!
Finishing touches: Chrome, Black, or Polished?
This is the fun part. The finish you choose for your 8x6 5 dually wheels 20 basically defines the personality of your truck.
- Polished Aluminum: This is the classic dually look. It's bright, it's flashy, and it looks amazing when it's clean. The only catch is that it takes work. You'll be spending some quality time with a microfiber towel and some metal polish to keep that mirror shine.
- Gloss or Matte Black: Black wheels have taken over the truck scene in the last decade. They give the truck a "blacked-out" or "murdered-out" look that's very aggressive. Plus, they hide brake dust way better than polished wheels do.
- Milled Accents: This is a middle ground where the wheel is painted black, but certain edges are machined down to the bare aluminum. It adds a lot of depth and detail to the wheel design.
- Chrome: If you want that high-end, luxury look without the maintenance of polished aluminum, chrome is a solid choice. It's durable and stays shiny with just a regular wash, though it can be prone to pitting if you live in a place where they salt the roads in winter.
Maintenance and care for your 20s
Once you've dropped the cash on a set of 8x6 5 dually wheels 20, you're going to want to keep them looking good. Dually wheels are notorious for being a bit of a pain to clean because there's just so much surface area, and those rear outers love to collect road grime.
The best advice is to stay on top of it. Don't let brake dust sit on the wheels for weeks, as it can actually eat into the finish over time. Use a dedicated wheel cleaner that's safe for your specific finish (especially if you have polished aluminum, as some cleaners are too acidic). A long-handled brush will be your best friend for reaching into the deep dishes of the rear wheels.
Also, don't forget the lug nuts. With an 8-lug setup, that's 32 lug nuts total for the whole truck (or 40 if you're counting the inners differently). Make sure they are torqued to the manufacturer's specs after the first 50 or 100 miles. Wheels can settle, and the last thing you want is a 20-inch wheel passing you on the highway because a lug nut came loose.
Final thoughts on the upgrade
Upgrading to 8x6 5 dually wheels 20 isn't just about vanity—it's about making your truck your own. Whether you're pulling a horse trailer, a massive camper, or just like the way a dually looks in the driveway, the right set of wheels makes all the difference. It bridges the gap between the classic utility of the 8x6.5 bolt pattern and the modern style of a 20-inch rim. Just make sure you check your load ratings, pick a finish you're willing to maintain, and get ready for a lot of people to stop and stare at your rig.