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RubberMaster S378 (P811) 5.30-12 C/6PLY

Trailer - Bias

Rims Not Included

easy test score

8.0 Excellent

Availability

In Stock

Per Tire:

$37.09

Estimated Delivery

Shipping

Total

See full specs

About the Manufacturer:

RubberMaster has been proudly in business since 1976. Built on a foundation of quality products and superior customer service, they have grown from humble beginnings in the retread industry to a nationwide and Canadian-serving wholesaler operating in both B2B and B2C markets. Their Midwest-rooted headquarters powers state-of-the-art logistics, ensuring reliable distribution across North America. In a fiercely competitive industry, they set themselves apart with their exclusive proprietary brands: RubberMaster tires, MASTER ATV tires, SteelMaster wheels (white, black, and silver), and RubberMaster Plus inner tubes.

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Specifications

Specs

Value

Description

Sidewall

Not Available

Describes the sidewall appearance. Examples: BSW= Black Side Wall, WSW = White Side Wall, OWL = Outlined White Letters.

Load Index

Not Available

The load index (LI) is a 2- or 3-digit number that correlates to the maximum amount of weight the tire can carry. For example, a tire with a load index of 87 indicates that the tire can carry a maximum load of 1,201 lbs. In this particularly example, 4 tires (each with a load index of 87) can carry a maximum of 4,804 lbs. Refer to your vehicle owner's manual for the recommended minimum load index.

Speed Rating

Not Available

Speed rating (SR) indicates the maximum speed the tire can achieve. Higher speed ratings are typically associated with better handling capabilities. Refer to your vehicle owner's manual for the recommended minimum speed rating.

Load Range/Ply Rating

C/6PLY

Ply rating, more commonly referred to as load range, represents the strength and durability of the tire. Higher ratings may indicate your tires can handle heavier loads.

UTQG

Not Available

To help consumers evaluate their tires, the U.S. National Highway Traffic Safety Administration (NHTSA) created the Uniform Tire Quality Grading System (UTQG). The UTQG rates tires are rated on their tread-wear, traction performance, and temperature resistance. The grade for each of these can be found on the sidewall of your tire (except for winter tires and certain light truck tires).

Max Single Load(lbs)

1045

The maximum load this tire will support. Remember to multiply this number by the number of tires installed on your vehicle to get the maximum carrying capacity. This number is directly related to the Load Index.

Max Single Air Pressure(PSI)

The maximum air pressure this tire will support. This does not represent the amount of air pressure your tires should have at all times. Consult with your owner's manual to determine the best air pressure you should use for your vehicle.

Tread Depth

7.0

The amount of tread on the tire. Once the tire is worn to 2/32nds, it is considered fully used and should be replaced at that time. Most tires will have tire indicators in the grooves of the tire to help you determine when the tires are worn down to 2/32nds.

Tread Design

Nondirectional

The pattern of the grooves, lugs, voids, and sipes on a tire's surface. This design affects the tire's traction, handling, and noise characteristics. Common types include symmetrical (uniform pattern across the tire), asymmetrical (different patterns on the inside and outside for varied road conditions), and directional (designed to rotate in one direction for improved wet traction and hydroplaning resistance).

Rim Width Range

Not Available

The approved wheel rim width range this tire will support.

Measured Rim Width

Not Available

The recommended wheel width as recommended by the tire manufacturer to get the best wear us performance for this tire.

Section Width

5.4

The measurement from sidewall to sidewall.

Tread Width

Not Available

The measurement from one side of the tread to the other side of the tread.

Overall Diameter

21.8

The height of the tire when fully inflated.

Manufacturer Part Number

489172

Manufacturer part number (sku)

Size Details

Size	UTQG	Load Range/Ply Rating	Overall Diameter	Section Width	Rim Width Min	Rim Width Max	Rim Width Meas	Tread Depth (in)	Max Single Air Pressure (PSI)	Max Single Load (lbs)	Max Dual Air Pressure (PSI)	Max Dual Load (lbs)	MFG #
4.80-12	-	B/4PLY	20.2	4.8	-	-	-	6.0	60	780	-	-	489142
4.80-12	-	C/6PLY	20.8	5.0	-	-	-	6.0	90	990	-	-	489150
5.30-12	-	B/4PLY	21.8	5.4	-	-	-	7.0	55	840	-	-	489162
5.30-12	-	C/6PLY	21.8	5.4	-	-	-	7.0	80	1045	-	-	489172
5.70-8	-	D/8PLY	18.6	5.5	-	-	-	7.0	100	1070	-	-	488955