Shop by size
18x8.50-8 Mower Tires
Also written 18x8.5-8
7 tires in stock at 18×8.50−8 from Kenda, Deestone, OTR, Vredestein. Most ship from Cleveland in 1 business day.
Front on residential lawn tractors and a common utility-cart fit on garden trailers.
Common ply
4P · 6P
From
$39.32
Owner-operated since 2004 · Free shipping to the lower 48 · Ships from Cleveland, OH in 1 business day
All 8 tires in 18x8.50-8
8 tires at this size, 7 in stock. Kenda direct from the manufacturer — no middleman on the hero brand.
Wrong size?18x7.50-8narrower20x10.50-8bigger16x6.50-8smaller20x10.00-8bigger
Not sure which? See how to chooseShowing 1–8 of 8
How to choose
Terrain first, then ply.
The tread families here
5 of the 8 tires at this size cluster into three families — owners pick by terrain, then ply.
Turf
The OEM pattern on most ZTRs and lawn tractors. Wide shoulders, shallow lugs — grips wet grass without tearing the lawn.
Best on: residential lawns, flat-to-moderate terrain
Kenda K500 Super Turf4P$49.932 more in this family, in the grid above.
AG / R1 Lug
Chevron lugs. Better grip on hills and damp clay, with the trade-off of visible tracking on flat lawns.
Best on: hilly yards, wet spring conditions, hauling
OTR Lawn Trac4P$91.64Heavy-duty turf
Same OEM tread family — stiffer sidewall, longer life under commercial-deck weight. Priced for the hours it runs, not the season.
Best on: commercial decks, baggers, long hours
Kenda K500 Super Turf6PWorkhorseOut of stockPrices per tire.
Then the ply
It's about deck weight and what you tow, not speed.
4 Ply— right for most
- Residential mowing on a 42″-to-50″ deck
- Flat-to-moderate lawns, no towing
- ~$56 cheaper per tire at this size
- Over-spec is overkill for residential — 6-ply buys nothing on a flat lawn
If you're not sure, this is you.
6 Ply— when the deck works for a living
- Running a bagger, towing a small cart, or mowing slopes
- Commercial-fleet decks
- The penalty for under-spec is a sidewall failure mid-season
Baggers and carts: spend the ~$56.
Two machines on the site take this size — we've written both guides.
Tube or tubeless — check the tire.
Tube type varies tire to tire at this size — check the Tube row on a tire's page before you order. When one is called for, the match is a 18x8.50-8 tube (TR-13 valve).
Common questions
18×8.50−8 breaks down as 18″ tall, 8.5″ wide, on a 8-inch wheel. It's also written 18x8.5-8.