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Sailun S637T ST235/80R16 G/14PLY

Trailer - Radial
Radial

Rims Not Included

easy test score

9.5 Superb

Availability

In Stock

Per Tire:

$196.23

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Category

Trailer - Radial | Radial

5541960

This listing is for new Sailun S637T ST235/80R16 G/14PLY Tires. Manufacturer part number: 5541960.

The Sailun S637 ST tire is a versatile all-steel special trailer highway rib tire. The heavy duty all steel construction delivers low rolling resistance, superior strength and durability while providing sure-footing and straight tracking. The Sailun S637 ST tire is perfect for all high load capacity trailer applications like 5th wheels, horse trailers and large boat trailers.

This tire is engineered specifically for trailer applications, including RVs, 5th-wheel units, utility trailers and boat haulers.

Featuring full steel-belted casing for maximum load capacity and straight-tracking stability, the S637T delivers dependable performance under heavy trailer loads. Its five-rib design enhances tread stability, and multi-sipes improve wet-road traction and help dissipate heat for extended tread life.

A solid shoulder construction resists irregular wear and contributes to better fuel efficiency in trailer duty.

Ideal for: High-load trailers, RVs, horse trailers, boat haulers and utility trailers requiring highway-rated durability and load-carrying strength.

Tire Features & Benefits:

All-steel construction for superior strength and load capacity
Five-rib tread design enhances straight-line stability under load
Multi-sipes increase wet traction and help dissipate heat for long life
Solid shoulder resists uneven wear and supports fuel-efficient performance
Optimised for trailer use with heavy loads and highway speeds

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About the Manufacturer:

Founded in 2002 in Qingdao, China, Sailun Group Co., Ltd. has grown into one of the top 12 tire manufacturers globally, distributing products across more than 180 countries. Sailun operates state-of-the-art, automated smart-factory production facilities in China (Qingdao, Dongying, Shenyang) and Vietnam (Tây Ninh), backed by international R&D centers in North America, Europe, and Asia.

Sailun revolutionized the tire industry with its proprietary EcoPoint3 technology—a sustainable liquid-phase mixing process that simultaneously improves the "Magic Triangle" of tire performance: tread life, wet grip, and fuel efficiency. Demonstrating its high-performance engineering and sidewall durability under extreme heat and torque conditions, Sailun serves as the Official Tire Partner for the Drift Masters European Championship.

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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

129/125

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
A guide to buying tires

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
Types of tires

G/14PLY

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). Click here to learn more.

Max Single Load(lbs)

4080

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)

110

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

10.0

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

6.5

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

Section Width

9.3

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

30.8

The height of the tire when fully inflated.

Manufacturer Part Number

5541960

Manufacturer part number (sku)

Financing

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Select 3, 6 or 12 monthly payments, with rates from 10% - 36% APR. 18 months financing available for orders over $1000.00

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To learn more visit Buy With Affirm or read their convenient Affirm FAQ's. All credit decisions are made by Affirm.

To contact Affirm regarding your account, please call 1-855-423-3729.

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Size Details

Size	Load Index/ Speed index	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 #
ST225/75R15	121M	-	F/12PLY	-	8.8	5.5	6.5	-	10.0	95	3200	-	-	4120722
ST235/80R16	129/125L	-	G/14PLY	30.8	9.3	-	-	6.5	10.0	110	4080	110	3640	5541960
ST235/80R16	130M	-	H/16PLY	-	9.2	6.0	7.0	-	10.0	120	4190	-	-	4122464
ST235/85R16	L	-	G/14PLY	31.7	9.3	-	-	6.5	12.0	110	4400	110	3860	5540993
ST235/85R16	133M	-	H/16PLY	-	9.2	6.0	7.0	-	12.0	120	4540	-	-	4122465