Vehicle

Tire type

Featured

Brand

Price

Score

Deals

Maximum Load Index

Load Range

Load

Minimum Speed Rating

Speed Rating

Popular Filters

Sidewall types

Run flat

Studded/Studdable

Three-Peak Mountain Snowflake

More filters

Low to High

High to Low

18x9.50-8 tires

Grassmaster

Like  their name suggest, all season tires are designed to give drivers performance year-round. All-season tires often provide strong performance in dry and wet conditions, and suitable traction and grip in wintery weather.

Lawn & Garden tires are built for use on riding or commercial mowers and offer drivers strong traction without the risk of compacting grass or turf.

This product is not covered by a manufacturer’s treadlife warranty.

Mileage Warranty

The maximum carrying capacity for a tire determined by the manufacturer.

Load Index

Maximum speed capability to safely carry a load for an extended period of time.

Max Speed

The maximum load carrying strength at the specified inflation pressure, also known as ply rating.

The side of the tire between the tread and rim, with cosmetic branding as well as information about the tire including manufacturer, model, size, etc.

Sidewall

Measured in 32nds of an inch, this metric shows how much tread life is left on a tire, with the tire's traction & stopping capabilities greatly diminished at 4/32nds and less. Tire manufacturers include "tire wear bars" at 2/32nds to indicate when your tire is worn out.

Tread Depth

The highest inflation pressure (measured in pounds of force per square inch, PSI) the tire is designed to contain, and should only be used when called for by the vehicle placard.

Inflation Pressure

An identifier of a particular tire line and size combination assigned by the tire manufacturer.

Part Number

Tread design (or tread pattern) can affect handling, traction & noise for different driving styles & road conditions.

Tread Design

Tire Weight

The measurement of width from a tires inner sidewall to the outer sidewall.

Section Width

The diameter of a tire that is inflated without any load applied.

Overall Diameter

Straight Rib

Chevron II

Turf Rib

The range of widths the rim of the vehicle can be for this tire to be safely mounted on.

Rim Range

Smooth

Turf Smooth

60 tires available in 18x9.50-8

In Size 18x9.50-8

**Most drivers choose from our top picks**<br />They include the best matches 
                     of this tire size based on popularity, user ratings, and price.

We'll start with our 5 top picks

Consistently rated as excellent by experts with the highest SimpleScore among the top 5 tires.

Top SimpleScore&trade;:

Chosen by our tire experts.

Classic Rib

Save on this  tire today.

Best deal:

Save even more.

Turf Saver

Most popular among drivers in PA

Best seller:

Go with the best seller

K358 Turf Rider

With similar, but improved specs to the factory tire

Best match:

Best match to original tire

D265

Based on verified customer reviews, this tire has been highly rated.

Top rated:

Best customer reviewed tire.

2 to 4 day delivery to Feasterville-Trevose, PA

From 42.96 to 120.99

Want to dive deeper?

Filter By

ENDS IN...

18x9.50/8 otr Tires

Featured

All

Vehicle

Category

Price Range

OTR Grassmaster
18x9.50-8 78A3 B | In stock

Category
All Season
Vehicle
Lawn & Garden
Mileage Warranty
N/A

Load Index
937 lbs (78)
Max Speed
9 MPH (A3)
Load Range
B (4 Ply)
Sidewall
Blackwall
Tread Depth
6/32nds
Inflation Pressure
24 PSI
Part Number
T804189508
Tread Design
Symmetrical
Tire Weight
9.46 lbs
Section Width
8.78"
Overall Diameter
18.2"

Join the SimpleCrew and get exclusive perks.

OTR Straight Rib
18x9.50R8 | In stock

Vehicle
Lawn & Garden
Mileage Warranty
N/A
Load Range
Standard (SL)

Sidewall
Blackwall
Inflation Pressure
24 PSI
Part Number
T6204189508
Tire Weight
13 lbs

OTR Chevron II
18x9.50-8 B | In stock

Vehicle
Lawn & Garden
Mileage Warranty
N/A
Load Range
B (4 Ply)

Sidewall
Blackwall
Inflation Pressure
24 PSI
Part Number
T10104189508
Tire Weight
16 lbs
Section Width
9.25"
Overall Diameter
17.91"

OTR Turf Rib
18x9.50-8 B | In stock

Vehicle
Lawn & Garden
Mileage Warranty
N/A
Load Range
B (4 Ply)

Sidewall
Blackwall
Tread Depth
4/32nds
Inflation Pressure
24 PSI
Part Number
T189508015
Tire Weight
11 lbs
Section Width
9.4"
Rim Range
7"
Overall Diameter
17.4"

OTR Smooth
18x9.50-8 B | In stock

Vehicle
Lawn & Garden
Mileage Warranty
N/A
Load Range
B (4 Ply)

Sidewall
Blackwall
Part Number
5504189508
Tire Weight
13 lbs

OTR Turf Smooth
18x9.50-8 78A3 B | In stock

Vehicle
Lawn & Garden
Mileage Warranty
N/A
Load Index
937 lbs (78)

Max Speed
9 MPH (A3)
Load Range
B (4 Ply)
Sidewall
Blackwall
Inflation Pressure
22 PSI
Part Number
T5504189508
Tire Weight
9.15 lbs
Section Width
8.8"
Overall Diameter
17.7"

Did you find what
you were looking for?

1893 90th Ave, Vero Beach, FL 32966

772-569-7629

M-F: 7:00 am-5:00 pm
Sat: 7:00 am-12:00 pm
Sun: Closed

Filter By

ENDS IN...

18x9.50/8 otr Tires

OTR Grassmaster18x9.50-8 78A3 B | In stock

CategoryAll SeasonVehicleLawn & GardenMileage WarrantyN/A

Load Index937 lbs (78)Max Speed9 MPH (A3)Load RangeB (4 Ply)SidewallBlackwallTread Depth6/32ndsInflation Pressure24 PSIPart NumberT804189508Tread DesignSymmetricalTire Weight9.46 lbsSection Width8.78"Overall Diameter18.2"

Join the SimpleCrew and get exclusive perks.

OTR Straight Rib18x9.50R8 | In stock

VehicleLawn & GardenMileage WarrantyN/ALoad RangeStandard (SL)

SidewallBlackwallInflation Pressure24 PSIPart NumberT6204189508Tire Weight13 lbs

OTR Chevron II18x9.50-8 B | In stock

VehicleLawn & GardenMileage WarrantyN/ALoad RangeB (4 Ply)

SidewallBlackwallInflation Pressure24 PSIPart NumberT10104189508Tire Weight16 lbsSection Width9.25"Overall Diameter17.91"

OTR Turf Rib18x9.50-8 B | In stock

VehicleLawn & GardenMileage WarrantyN/ALoad RangeB (4 Ply)

SidewallBlackwallTread Depth4/32ndsInflation Pressure24 PSIPart NumberT189508015Tire Weight11 lbsSection Width9.4"Rim Range7"Overall Diameter17.4"

OTR Smooth18x9.50-8 B | In stock

VehicleLawn & GardenMileage WarrantyN/ALoad RangeB (4 Ply)

SidewallBlackwallPart Number5504189508Tire Weight13 lbs

OTR Turf Smooth18x9.50-8 78A3 B | In stock

VehicleLawn & GardenMileage WarrantyN/ALoad Index937 lbs (78)

Max Speed9 MPH (A3)Load RangeB (4 Ply)SidewallBlackwallInflation Pressure22 PSIPart NumberT5504189508Tire Weight9.15 lbsSection Width8.8"Overall Diameter17.7"

Did you find what you were looking for?

OTR Grassmaster
18x9.50-8 78A3 B | In stock

Category
All Season
Vehicle
Lawn & Garden
Mileage Warranty
N/A

Load Index
937 lbs (78)
Max Speed
9 MPH (A3)
Load Range
B (4 Ply)
Sidewall
Blackwall
Tread Depth
6/32nds
Inflation Pressure
24 PSI
Part Number
T804189508
Tread Design
Symmetrical
Tire Weight
9.46 lbs
Section Width
8.78"
Overall Diameter
18.2"

OTR Straight Rib
18x9.50R8 | In stock

Vehicle
Lawn & Garden
Mileage Warranty
N/A
Load Range
Standard (SL)

Sidewall
Blackwall
Inflation Pressure
24 PSI
Part Number
T6204189508
Tire Weight
13 lbs

OTR Chevron II
18x9.50-8 B | In stock

Vehicle
Lawn & Garden
Mileage Warranty
N/A
Load Range
B (4 Ply)

Sidewall
Blackwall
Inflation Pressure
24 PSI
Part Number
T10104189508
Tire Weight
16 lbs
Section Width
9.25"
Overall Diameter
17.91"

OTR Turf Rib
18x9.50-8 B | In stock

Vehicle
Lawn & Garden
Mileage Warranty
N/A
Load Range
B (4 Ply)

Sidewall
Blackwall
Tread Depth
4/32nds
Inflation Pressure
24 PSI
Part Number
T189508015
Tire Weight
11 lbs
Section Width
9.4"
Rim Range
7"
Overall Diameter
17.4"

OTR Smooth
18x9.50-8 B | In stock

Vehicle
Lawn & Garden
Mileage Warranty
N/A
Load Range
B (4 Ply)

Sidewall
Blackwall
Part Number
5504189508
Tire Weight
13 lbs

OTR Turf Smooth
18x9.50-8 78A3 B | In stock

Vehicle
Lawn & Garden
Mileage Warranty
N/A
Load Index
937 lbs (78)

Max Speed
9 MPH (A3)
Load Range
B (4 Ply)
Sidewall
Blackwall
Inflation Pressure
22 PSI
Part Number
T5504189508
Tire Weight
9.15 lbs
Section Width
8.8"
Overall Diameter
17.7"

Did you find what
you were looking for?