This listing is for new Towstar STR ST225/75R15 D/8PLY Tires. Manufacturer part number: TWR51T.
Towstar STR is an ST Radial tire made for towing trailer applications.
Tire features:
Solid center rib for straight-line stability.
Enhanced shoulder tread design offers better heat dissipation for longer and more even wear.
Four circumferential grooves assist with water evacuation and help to reduce the hydroplaning risk.
Best suited for: Trailers.
For over 2 decades, Tires Easy has served the online tire community. With over 8 million tires sold, 43K+ 5-star reviews, and tens of thousands of tires just one click away, there’s a reason why millions of customers choose Tires Easy as their online tire destination.
Towstar Tires, founded in 1993 in the USA, is a leading specialized brand focused on trailer tire solutions. Operating mainly across North America, Towstar Tires is trusted for its purpose-built design and reliability, offering safety, durability, and optimal load support for an extensive range of trailers, including utility, boat, cargo, horse, and RV trailers. Towstar is a prominent Original Equipment (OE) choice for many trailer manufacturers, highlighting its consistent quality and performance in demanding applications.
We can help! Our trained experts have years of tire fitment experience and are available to answer questions.
Specifications
Shipping & Payment
Financing
Size Details
OE Fitment
Specifications
Specs
Value
Description
Sidewall
Not Available
Describes the sidewall appearance. Examples: BSW= Black Side Wall, WSW = White Side Wall, OWL = Outlined White Letters.
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Load Index
113/108
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.
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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.
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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.
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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.
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Max Single Load(lbs)
2540
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.
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Max Single Air Pressure(PSI)
65
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.
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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.
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Tread Design
Not Available
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).
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Rim Width Range
Not Available
The approved wheel rim width range this tire will support.
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Measured Rim Width
6.0
The recommended wheel width as recommended by the tire manufacturer to get the best wear us performance for this tire.
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Section Width
8.8
The measurement from sidewall to sidewall.
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Tread Width
Not Available
The measurement from one side of the tread to the other side of the tread.
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Overall Diameter
28.3
The height of the tire when fully inflated.
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Manufacturer Part Number
TWR51T
Manufacturer part number (sku)
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Shipping & Payment
Shipping rates and estimated delivery times are available on tires after setting your delivery zip code. Tires ship via FedEx Ground and the shipment times are a very good estimate, although not an exact number of time-in-transit days. Tires are delivered Monday - Saturday. FedEx does not pick up orders on weekends or certain holidays. Once the tires are picked up, the time-in -transit estimate begins. If you place your order Friday afternoon, or on the weekend, your tires it will not ship until the following week. Currently we only offer FedEx Ground, expedited shipping is not available. Depending on when you place your order, there may be one, possibly two days of processing time. Shipping delivery times can be impacted by weather events across the country.
You can choose between 3 delivery options:
Your tires can be delivered directly to your billing address.
Your tires can be delivered to an alternate address. In this case, please specify the delivery address and the person authorized to receive the tires on your behalf.
The tires can be delivered directly to a Tire Installer of your choice. Please enter the address of the Tire Installer in the "Ship To" address and be sure to coordinate acceptance of your shipment from Tires-easy.com.
You will receive an e-mail confirmation of the transaction when you place your order. Please save a printed copy of your order confirmation for your records.
We accept American Express, Visa, MasterCard, Discover, PayPal, Katapult and Affirm for Tire Financing.
You can pre-qualify to finance your tires, or you can simply choose Affirm at check-out. Fill out your information and choose the monthly payment that works best for you!
Select 3, 6 or 12 monthly payments, with rates from 10% - 36% APR. 18 months financing available for orders over $1000.00
Checking your eligibility won't affect your credit. You will receive an immediate answer from Affirm.
Affirm has no hidden fees or costs and is completely secure.
Quick and easy, real tire financing, real fast! You can apply in advance and know you can shop for tires when you are ready.
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.
No hidden fees
Affirm has no hidden fees or costs and is completely secure
Flexible
You choose the payment schedule that works for you
Quick and easy
Fill out your information and get a real-time decision
With a small down payment, and easy payments you can lease your tires. Payments are coordinated with your payday. Read more here about how Katapult works.
Compare tires at a glance using our easy test score® system. Our proprietary algorithm factors in performance, expert insights, user reviews, and Uniform Tire Quality Grading (UTQG) scores.
Four criteria factor into easy test score®
Consumer reviews
Research based on customer reviews and buying behavior
Treadwear
The lifespan of a tire based on wear performance
Traction
The ability of a tire to grip to the road in wet conditions
