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what size tire fits a 20x11 rim

GeneralEmily ReedJun 28, 2026, 11:14 AM20 replies

I just picked up a set of 20x11 wheels for my 2018 Polaris Sportsman 570 and I'm trying to figure out what tire size will actually fit these rims. The previous owner had 26x9-12 tires on stock wheels, but these new rims are much wider and taller. I mostly ride trail and some mud – need something that won't rub and still handles decent on hardpack. Any advice on the right tire height and width?

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Grace PowellJun 28, 2026, 11:14 AM

You're looking at a 20-inch diameter rim. Tire size is usually given as something like 20x11-9 or 20x11-10, but that middle number is the rim width – yours is 11 inches, so you need a tire with an 11-inch mounting width. Common sizes are 20x11-9 or 20x11-10, but check the tire's actual rim width range because some 20x11-9 tires are designed for 9-inch wide rims only.

Ryan FosterJun 28, 2026, 11:14 AM

I run 20x11-9 on my Grizzly 700 with 14-inch rims. Wait – your rim is 20 inches? That's huge. Are you sure it's not a 14 or 15 inch diameter? Double-check the rim diameter because 20-inch rims are rare on ATVs. Might be a UTV rim. If it's really 20 inches, tire options are limited – maybe 30x11-20 or 28x11-20, but those are big.

David ColemanJun 28, 2026, 11:14 AM

I think you might be confusing rim diameter with tire diameter. ATV rims are typically 12, 14, or 15 inches. A 20x11 rim would be 20 inches tall? That doesn't sound right. Could you measure the rim diameter from bead seat to bead seat? Or look for a stamp on the back that says something like 14x11. That would make more sense.

Tyler BrooksJun 28, 2026, 11:14 AM

If it's actually a 20x11 rim (20 inch diameter, 11 inch width), then you need a tire with a 20 inch inner diameter. Look for tires listed as 20x11-20 or 20x11-XX where the last number matches the rim diameter. For example, 24x11-20 would fit a 20 inch rim. But those are huge – you'd need a lot of lift and clearance.

Sean PetersonJun 28, 2026, 11:14 AM

I've seen those sizes on some custom builds. My buddy put 28x11-20 tires on his lifted Raptor 700 with 20x11 rims. It required a 6-inch lift and trimming. Not for mild trail riding. If you're on a Sportsman 570, you probably don't want to go that big. Stick with something like 26x11-20 if you can find it.

Nicole SimmonsJun 28, 2026, 11:14 AM

Check with your local tire shop. Most ATV tires are for 12 or 14 inch rims. 20 inch rims are more common on SxS or buggies. You might be better off selling those rims and getting standard 14x11 or 12x7 wheels that fit typical ATV tire sizes like 26x9-12 or 27x11-14. Just my two cents.

Justin HayesJun 28, 2026, 11:14 AM

I disagree with the guy saying to sell them. 20 inch rims can work if you do it right. I have 20x11 wheels on my Kingquad 750 with 28x11-20 tires. Had to install a snorkel and extension kit, but it crawls over everything. For a Sportsman 570, I'd go with 26x11-20 tires – they're out there, just not as common.

Brandon SandersJun 28, 2026, 11:14 AM

Before buying anything, measure your wheel well clearance. Put the rim on with no tire and check how much space you have to the fender, frame, and brake lines. A 26 inch tall tire on a 20 inch rim gives you a 3 inch sidewall – that's low profile and might ride harsh on trails. Not ideal for rough terrain.

Chris MurphyJun 28, 2026, 11:14 AM

I run 20x11-20 tires on my 2017 Outlander 1000, but that's with a 5-inch lift and extended A-arms. The stock machine wouldn't clear them. The Sportsman 570 might need similar mods. Also, the gearing will change significantly – you'll lose low-end torque. Re-gearing or a clutch kit might be needed.

Joe SimmonsJun 28, 2026, 11:14 AM

You could try 25x11-20 tires – they're a bit shorter and might fit with minimal rubbing. Check sites like Rocky Mountain ATV or TireRack for ATV tires in 20 inch rim diameter. Filter by rim size. I found a few options from Maxxis and ITP in that size, but they're mainly for mud racing.

Emily TurnerJun 28, 2026, 11:14 AM

I think you're making this harder than it is. Just look at the current tire size on your stock rim. Stock is probably 25x9-12 front and 25x11-12 rear. The 20 inch rim is a different diameter. You can't just swap tires. You'll need new tires that match the rim diameter. Maybe consider returning the rims and getting the correct size.

Nathan ReedJun 28, 2026, 11:14 AM

I've had good luck with 26x11-20 tires on 20x11 rims for trail riding. The sidewall is stiff enough for cornering but still gives some give on rocks. They fit on my lifted Grizzly with 4 inches of clearance. Check that your wheel offset is right – too much offset can cause rubbing on the frame.

Beth MitchellJun 28, 2026, 11:14 AM

If you're buying tires for these rims, make sure you check the load rating and speed rating. Some 20 inch ATV tires are intended for UTVs and are heavier. They can make your ATV sluggish. Also, install wheel studs that are long enough – the thicker tire bead might need deeper lug nuts.

Derek ColeJun 28, 2026, 11:14 AM

I'd run 24x11-20 tires if you want a mild upgrade without major mods. They'll fit on a 20x11 rim with about 2 inches of sidewall. You'll still need to check clearance on the swingarm and lower control arm. Expect to do some fender trimming or add spacers if they rub.

Amy SandersJun 28, 2026, 11:14 AM

Be careful with tire sizes that aren't common. Some 20x11 rims have odd offsets (like +5) that center the tire differently. Measure your backspacing. And remember, tires for 20 inch rims often require a larger bead lock ring – make sure your rims are compatible with beadlocks if you plan to run low psi.

Peter BaileyJun 28, 2026, 11:14 AM

I've got a friend who runs 27x11-20 Swamp Lites on his 20x11 wheels. His machine is lifted 8 inches and he uses it for deep mud. For trail riding, that's overkill. The Sportsman 570 isn't built for that. If you're stuck on these rims, go with 26x11-20 all-terrains like the Maxxis Bighorn – decent on trails.

Tyler RichardsonJun 28, 2026, 11:14 AM

What about getting adapters? You could run 20x11 rims with a 12 inch tire adapter, but that's sketchy. Not recommended. Better to just buy new wheels that match the existing tire size. The cost of adapter plus new custom tires might be more than just getting standard 14x11 wheels.

Logan GreenJun 28, 2026, 11:14 AM

I'm with the guy who says double-check the rim size. I once bought a set of 20x11 rims thinking they were ATV wheels, but they were actually for a golf cart. The bolt pattern was 4x4 and the offset was all wrong. Measure your hub pattern too – Polaris uses 4x156 or 4x137 depending on the model.

Aaron RossJun 28, 2026, 11:14 AM

If you go with 26x11-20 tires, plan on changing your gearing. I'd drop one tooth on the front sprocket to get back some low-end. And use a tusk clutch kit if your machine is belt drive. The heavier tires will strain the drivetrain. I learned that the hard way when mine started slipping.

Brian CookJun 28, 2026, 11:14 AM

I say just take the rims to a tire shop and have them mount a 26x11-20 tire that they recommend. Let them test fit on the machine. Most shops will charge a small fee, but it's better than ordering the wrong size and being stuck with return shipping. At least you'll know what works.

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