What size are zero-turn mower tires?

It varies by model, but common factory fitments are 13x5.00-6 or 15x6-6 up front and 20x8.00-8, 20x10-8, or 22x9.50-12 in the rear on larger commercial-class machines, per common replacement-tire listings from Carlisle and Kenda. The exact size is stamped on the tire sidewall — always match by that number rather than guessing from deck size, since two mowers with the same deck width can spec different tires.

Should I replace zero-turn tires in pairs?

Rear drive tires are worth replacing as a pair even if only one is worn, since a zero-turn steers by varying power between the two rear wheels and mismatched tread depth or diameter between left and right can cause a subtle pull to one side. Front caster tires wear more evenly and are less critical to replace together, though checking both at the same time is still good practice.

Are flat-free zero-turn mower tires worth it?

Flat-free (solid polyurethane) tires make sense if you mow ground with recurring puncture hazards — gravel, thorny brush, construction debris — since they eliminate flats entirely. The tradeoff is a firmer ride and, on some models, extra unsprung weight, so most homeowners on typical turf are better served by a quality pneumatic tire and keeping a plug kit or spare tube on hand.

What's the difference between turf-saver and multi-trac tire tread?

Turf-saver tread uses a shallow, closely-spaced rib or lug pattern designed to minimize lawn scarring and compaction, while multi-trac and similarly aggressive patterns use deeper lugs for more traction on hills or wet grass at the cost of slightly more visible tracking. Most flat, well-maintained residential lawns do fine on turf-saver; sloped or frequently-wet properties benefit from the extra bite of a multi-trac-style tread.

Zero-Turn Mower Tires: Sizing, Tread, and Flat-Free Options (2026)

Quick Answer: Zero-turn replacement tires are sold by an exact size stamped on the sidewall — common fitments run 13x5.00-6 or 15x6-6 up front and 20x8.00-8 up to 22x9.50-12 in the rear on larger machines, and Carlisle and Kenda are the two most widely stocked replacement brands, per common tire-retailer listings. Replace rear drive tires in pairs to keep left/right diameter matched (mismatched rear tires can make a zero-turn pull to one side), pick a turf-saver-style tread for flat lawns or a more aggressive multi-trac-style tread for slopes or wet ground, and only step up to flat-free or foam-filled tires if you’re dealing with recurring punctures — the firmer ride isn’t worth it otherwise.

Tires are one of the few zero-turn parts most owners replace themselves, but the sizing and tread choices trip people up more than any other maintenance item on the mower. Here’s how to buy the right ones the first time.

Common tire sizes by position

Position	Common sizes	Notes
Front caster (residential)	11x4-5, 13x5.00-6, 13x6.50-6	Smaller-deck homeowner-class mowers, see our residential zero-turn guide
Front caster (commercial)	15x6-6, 15x6.00-6	Larger fabricated-deck machines, see our commercial zero-turn guide
Rear drive (residential)	18x8.50-8, 20x8.00-8, 20x10-8	Most common fitment across 42-54" residential decks
Rear drive (commercial)	22x9.50-12, 23x10.50-12	Larger-diameter tires on 60"+ commercial machines

These ranges cover the tires most commonly listed for replacement across major brands, but the only size that matters for your machine is the one stamped directly on the tire sidewall — always match that exact number (width x diameter-rim size) rather than estimating from deck width, since the same nominal deck size can ship with different tire fitments across brands and model years.

Turf-saver vs. more aggressive tread

Carlisle Turf Saver tires

Shallow rib tread · minimizes lawn scarring on flat, well-maintained turf

Good default choice for flat residential lawns where compaction and visible tracking matter more than raw traction.
Match the exact size off your old tire's sidewall, not the deck width.

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A shallow, closely-ribbed pattern like Carlisle’s Turf Saver line is the default choice for flat, well-maintained residential lawns — it minimizes visible tracking and lawn compaction at the cost of some traction. Deeper multi-lug patterns, sometimes marketed as multi-trac or all-terrain turf tires, dig in harder on slopes or wet grass but leave more visible tread marks on soft turf. If you mow a property with real grade, pair tire choice with the chassis and ROPS considerations in our best zero-turn mower for hills guide rather than relying on tread alone.

Pneumatic vs. flat-free vs. foam-filled

Standard air-filled (pneumatic) tires are the factory default on nearly every zero-turn because they ride the smoothest and cost the least to replace. Flat-free tires — solid polyurethane, molded to the same size as a pneumatic — eliminate punctures entirely but ride noticeably firmer and add some weight per tire, which matters more on rough or rocky ground than on flat turf. Foam-filling an existing pneumatic tire splits the difference: it keeps the original tire and rim but permanently removes the risk of a flat, at the cost of a similarly firmer ride and a bit of professional labor to inject the foam. Most owners on typical residential turf do best sticking with pneumatic tires and keeping a plug kit on hand for the occasional puncture; foam-fill or flat-free tires earn their keep on ground with recurring hazards like gravel driveways, construction debris, or thorny brush.

Replacing rears in pairs

Because a zero-turn steers by varying power between its two rear drive wheels rather than turning a steering wheel, even a small mismatch in rear tire diameter or tread depth between left and right can translate into a subtle pull during straight passes — the same side-to-side sensitivity that shows up when tire pressure is uneven. That’s why replacing both rear tires together, even if only one looks worn, is worth the extra cost on a machine you use regularly. Front caster tires wear more evenly and matter less for straight-line tracking, so they’re more forgiving to replace one at a time.

Installation and what to check first

Before ordering, confirm whether your mower uses a tube-type or tubeless rim — tubeless rims need an intact bead seal to hold air, while tube-type rims use an inner tube regardless of the outer tire’s tread. Mixing the two (installing a tubeless tire on a tube-type rim without a tube, or vice versa) is a common source of persistent slow leaks. If a tire won’t hold air at all and the mower otherwise drives fine, check the valve stem and rim bead before assuming the tire itself is bad — a worn valve core is a five-minute, low-cost fix that gets skipped surprisingly often. If the mower has stopped driving altogether rather than just losing tire pressure, that’s a different issue — see our zero-turn mower won’t move troubleshooting guide.

The bottom line

Match your replacement tire to the exact size stamped on the old tire’s sidewall, not the deck width — front and rear sizes both vary meaningfully between residential and commercial-class machines. Stick with a turf-saver-style tread on flat lawns and step up to a more aggressive pattern on slopes, replace rear drive tires in pairs to keep steering symmetric, and only pay the ride-quality tax for flat-free or foam-filled tires if you’re actually fighting recurring punctures.