7 Best 21×10 8 ATV Tires for Trail and Mud Riding (2026)

By Graham Fisher

Updated November 2026

Finding the right 21×10 8 ATV tires comes down to matching tire size, ply rating, tread pattern and riding terrain to how you actually use your machine. This guide compares seven tire sets from the same product list, sorted by how closely each one fits the common selection criteria: correct sizing for 8-inch rims, a tread suited to trail and mud use, a sturdy construction, and a sensible setup for the rider’s needs. Specifications come from manufacturer listings and commonly reported owner feedback. We have not tested these tires ourselves.

Our Top Picks

Quick Comparison

22x10x8 ATV UTV Tires 6 PR [Set of 2] SunF 22×10-8 22x10x8 Knobby Race 6 PR Tubeless Tire A030

22x10x8 ATV UTV Tires 6 PR [Set of 2] SunF 22×10-8 22x10x8 Knobby Race 6 PR Tubeless Tire A030

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Best for: Trail builds that need a wider rear stance with aggressive knobby traction.

This set suits riders who want a knobby race-style tread on a 22-inch-diameter, 10-inch-wide rear profile and are comfortable confirming rim and fender clearance before ordering.

Key specs

• Size: 22x10x8 (listed as 22×10-8)
• Ply rating: 6 PR
• Construction: Tubeless
• Quantity: Set of 2

Pros

• Knobby race tread suited to loose dirt and mud
• 6-ply construction adds sidewall stiffness
• Tubeless design fits modern rim setups

Cons

• Larger footprint may rub on some stock fenders
• Set of 2 means matching the opposite axle separately

Bottom line: A good match for riders running a wider rear stance who want serious knobby grip. Measure clearance first.

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SunF 21×7-10 Front & 20×11-8 Rear ATV UTV Knobby Sport Tires, 6 PR Tubeless A027, Set of 4

SunF 21×7-10 Front & 20×11-8 Rear ATV UTV Knobby Sport Tires,6 PR Tubeless A027, Set of 4

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Best for: Full-set replacement on mixed trail and mud terrain.

Riders replacing all four tires at once will find this set straightforward, since it covers both front and rear sizing in a single purchase.

Key specs

• Front size: 21×7-10
• Rear size: 20×11-8
• Ply rating: 6 PR
• Construction: Tubeless
• Quantity: Set of 4

Pros

• Complete front and rear set in one order
• Knobby sport tread for general trail use
• 6 PR construction for sidewall durability

Cons

• Rear width differs from the 8-inch rim spec in the title, so confirm your rim
• Knobby tread can feel noisy on pavement

Bottom line: The most convenient option for a complete replacement. Confirm rim width before buying.

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Set of 4 SunF 21×7-10 Front & 20×11-9 Rear ATV UTV Knobby Sport Tires, 6 PR Tubeless A027

Set of 4 SunF 21×7-10 Front & 20×11-9 Rear ATV UTV Knobby Sport Tires,6 PR Tubeless A027

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Best for: Riders who want a 9-inch rear rim option with the same knobby sport profile.

This set is aimed at riders whose rear rim is 9 inches rather than 8 and who want a matching front-and-rear package.

Key specs

• Front size: 21×7-10
• Rear size: 20×11-9
• Ply rating: 6 PR
• Construction: Tubeless
• Quantity: Set of 4

Pros

• Full four-tire set for consistent handling
• Knobby sport tread for trail and light mud
• Tubeless construction

Cons

• Not a direct fit for 8-inch rear rims
• Rear width may need fender clearance checks

Bottom line: Choose this if your rear rim is 9 inches. Otherwise a different set will fit better.

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Heavy Duty Tubeless, Non-Directional Tread Set of 2 ATV/UTV Tires 18×10-8, 4PR

Heavy Duty Tubeless, Non-Directional Tread Set of 2 ATV/UTV Tires 18×10-8, 4PR, 18x10x8 All-Terrain Tires

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Best for: Light trail use and budget-conscious replacements.

Riders doing mostly light trail work, or those who want a lower-cost replacement pair, may find this set a practical starting point. Note that its size is 18×10-8, not 21×10-8.

Key specs

• Size: 18×10-8
• Ply rating: 4 PR
• Construction: Tubeless
• Tread: Non-directional
• Quantity: Set of 2

Pros

• Non-directional tread allows mounting on either side
• Budget-friendly option for light use
• Tubeless design

Cons

• Size is 18 inches in diameter, so it is not a true 21×10-8 fit
• 4 PR construction is lighter than 6 PR options

Bottom line: Only consider this if you have confirmed it fits your rim and wheel setup. It suits light use more than heavy trail riding.

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SunF ATV UTV Knobby Sport Tires 21×7-10, 6 PR Tubeless A027, Set of 2

SunF ATV UTV Knobby Sport Tires 21×7-10,6 PR Tubeless A027, Set of 2

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Best for: Replacing a single axle pair without buying a full set.

This two-tire option works well for riders who only need to replace the front or rear pair and want to keep the remaining tires in service.

Key specs

• Size: 21×7-10
• Ply rating: 6 PR
• Construction: Tubeless
• Quantity: Set of 2

Pros

• Lets you replace only one axle
• Knobby sport tread
• 6 PR construction

Cons

• Matching tread wear on the other axle may be uneven
• Only covers one axle, so a second order may be needed

Bottom line: A practical choice for a single-axle replacement. Check that the existing tires have similar wear.

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Set of 4 SunF A021 TT Sport ATV UTV Flat Track Tires 21×7-10 Front & 18×9.5-8 Rear, 6 PR, Tubeless

Set of 4 SunF A021 TT Sport ATV UTV Flat Track Tires 21×7-10 Front & 18×9.5-8 Rear, 6 PR, Tubeless

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Best for: Open terrain and flat track riding.

Riders who spend most of their time on open, groomed, or flat terrain rather than deep mud will find this profile better suited than aggressive knobby designs.

Key specs

• Front size: 21×7-10
• Rear size: 18×9.5-8
• Ply rating: 6 PR
• Construction: Tubeless
• Quantity: Set of 4

Pros

• Flat track profile suits open terrain
• Full set in one order
• 6 PR construction

Cons

• Less bite in deep mud than knobby tread
• Rear size differs from a 21×10-8 rear, so confirm fitment

Bottom line: Best for open and flat track riding. Not the right pick for heavy mud.

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WANDA Sport ATV Tires Set 21×8-9 Front & 22×10-10 Rear, 4PR GNCC Race Tires

Designed for Grand National Cross Country Series Race WANDA Sport ATV Tires Set 21×8-9 Front & 22×10-10 Rear /4PR GNCC Race Tires

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Best for: Competitive cross-country racing.

This set is designed around race-series cross-country riding. It is a specialized choice for riders competing in events or who want a race-oriented setup.

Key specs

• Front size: 21×8-9
• Rear size: 22×10-10
• Ply rating: 4 PR
• Design: GNCC race-oriented

Pros

• Race-oriented design for cross-country use
• Front and rear sizing included
• Complete set in one package

Cons

• Sizes differ from a standard 21×10-8 setup
• 4 PR construction may suit race use better than daily trail riding

Bottom line: A focused choice for race-style cross-country riding. Verify rim sizes carefully.

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Buying Guide

Confirm Rim and Tire Size Before You Buy

Tire size is written as width, diameter and rim diameter. A 21×10-8 tire is roughly 21 inches tall, 10 inches wide, and fits an 8-inch rim. Check your current tire sidewall and rim markings before ordering, because several listed sets use different front and rear sizes or 9-inch rear rims.

Good picks for this: SunF 21×7-10 Front & 20×11-8 Rear ATV UTV Knobby Sport Tires; 22x10x8 ATV UTV Tires 6 PR [Set of 2]

Ply Rating and Sidewall Strength

Ply rating indicates sidewall and casing strength. Six-ply tires generally resist punctures and sidewall damage better than four-ply designs, which matters on rocks and roots. Heavier riders and riders on rough trails should favor higher ply ratings.

Good picks for this: SunF ATV UTV Knobby Sport Tires 21×7-10, 6 PR Tubeless A027; Set of 4 SunF A021 TT Sport Flat Track Tires

Tread Pattern for Your Terrain

Knobby tread bites into mud and loose dirt, while flat track or lower-profile tread performs better on hard-packed or open ground. Non-directional tread can be mounted on either side, which simplifies rotation. Match the tread to where you ride most.

Good picks for this: 22x10x8 ATV UTV Tires 6 PR [Set of 2] SunF A030 Knobby Race; Set of 4 SunF A021 TT Sport Flat Track Tires

Front and Rear Size Differences

Many ATVs use different front and rear tire sizes. Running mismatched sizes on the wrong axle can affect steering, handling and drivetrain wear. Verify the size for each axle separately, and confirm whether a set covers both or only one axle.

Good picks for this: Set of 4 SunF 21×7-10 Front & 20×11-9 Rear ATV UTV Knobby Sport Tires; SunF ATV UTV Knobby Sport Tires 21×7-10, Set of 2

Tubeless Construction

Tubeless tires seal against the rim without an inner tube, which can reduce pinch flats and allow low-pressure trail running when the bead seats properly. Confirm that your rims are rated for tubeless use before mounting.

Good picks for this: Heavy Duty Tubeless, Non-Directional Tread Set of 2 ATV/UTV Tires 18×10-8; WANDA Sport ATV Tires Set GNCC Race Tires

Use Case: Trail, Mud, Racing or Open Terrain

Your riding style should drive the choice. Trail riders benefit from balanced knobby tread, mud riders need deeper lugs, racers often prefer race-oriented designs, and open-terrain riders do well with flat track profiles. Think about how far you ride from the truck and how much you need to repair on the trail.

Good picks for this: WANDA Sport ATV Tires Set GNCC Race Tires; SunF 22x10x8 Knobby Race A030

Care and Pressure Maintenance

Check pressure before every ride, since low pressure improves traction on soft ground but raises the risk of rim damage on hard impacts. Inspect sidewalls for cuts after rides and rotate tires when wear patterns differ between axles. Pressure guidance varies by tire and rider weight, so consult the manufacturer or a dealer for the right setting for your machine.

Good picks for this: Set of 4 SunF A021 TT Sport Flat Track Tires; SunF ATV UTV Knobby Sport Tires 21×7-10, Set of 2

FAQ

What does 21×10 8 mean on an ATV tire?

The first number is the approximate overall diameter in inches, the second is the section width in inches, and the final number is the rim diameter in inches. A 21×10-8 tire fits an 8-inch rim.

Can I use 21×10-8 tires on any ATV?

No. Fitment depends on the rim size, axle, and fender clearance on your specific machine. Check your owner’s manual or your current tire markings before buying.

Are tubeless tires better for ATVs?

Tubeless tires can reduce the chance of pinch flats and allow low-pressure trail riding, provided the rims are rated for tubeless use and the bead seals correctly.

What does ply rating mean?

Ply rating reflects the strength of the tire casing. Higher ply ratings generally mean stiffer sidewalls and better puncture resistance, though they can ride less smoothly.

Should I replace all four tires at once?

Replacing all four keeps tread depth and diameter consistent, which helps handling and drivetrain health. Replacing only one axle is possible, but tread differences can affect traction and steering.

Is knobby tread good for mud?

Knobby tread generally grips mud and loose dirt better than flat or low-profile tread. It can be noisier and wear faster on pavement, so consider your riding mix.

How do I check tire pressure correctly?

Use a quality gauge when the tires are cold, and set pressure according to the manufacturer’s guidance for your machine and load. Recheck after adjusting.

Conclusion

For most riders looking for a complete 21×10-8 style setup, the SunF knobby sport sets offer a balanced combination of sizing options and construction. Riders who need a 9-inch rear should choose the mixed 20×11-9 set, while those replacing only one axle will find the two-tire SunF set more practical. Flat track and race-oriented designs suit specialized riding, and the lighter-duty budget set fits light use. Always confirm rim and fender fitment before ordering, since sizing differences can matter more than any single feature.

Sources

• Consumer safety guidance on recreational off-highway vehicle use, including riding and protective equipment (cpsc.gov)
• Industry information on tire construction, sizing terminology and maintenance practices
• Standards information relevant to tire sizing and performance terminology

Related reading

• Where Are SunF ATV Tires Made? Origin, Factories and How to Check
• Used Tires for ATV: 6 Best Picks for Trail and Mud Riding (2026)
• Top 7 Turf Tires for ATV Compared for Lawns and Trails
• Top 5 Tires for ATV 4 Wheeler Worth Considering in 2026
• Top 5 Four Wheeler ATV Tires for Trail and Mud Riding (2026)

About Graham Fisher

Graham Fisher is part of our editorial team and reviews and edits our ATV, UTV/side-by-side & dirt bikes guides, checking product details against manufacturer specifications and owner feedback.