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Gladiator - QR15-STB

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Gladiator QR15-STB Tires

The Gladiator QR15-STB tire is a ST, or "Special Trailer" tire for boat trailers, campers or utility trailer applications. The special trailer tire construction, and materials used, means the Gladiator QR15-STB tire can carry heavy loads and handle the rigors of overloading or off-road towing conditions. ST tires can only be used on trailers because the sides of the tires are heavily reinforced and are too rigid for the suspension of a truck, SUV or car. Apart from the strength of the tire, this tire has wide open circumferential grooves to quickly and efficiently evacuate water from under the tire for very good grip and tracking on wet or flooding roads.

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Gladiator - QR15-STB

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Mileage Warranty

Gladiator QR15-STB ST175/80D13 C/6PLY

1942041831 Gladiator QR15-STB ST175/80D13 C/6PLY Tires

Rims Not Included

Trailer - Bias

easy test score

8.0 Excellent

Per Tire:

$38.00

OR

$Loading /mo

Save $

Lightning Savings

Was $47.5

Strikethrough Pricing on Giga Tires

Our percentage-off promotions, discounts, or sale markdowns are customarily based on our own opinion of the value of this product, which is not intended to reflect a former price at which this product has sold in the recent past. This amount represents our opinion of the full retail value of this product today, based on our own assessment after considering a number of factors.

Estimated Delivery

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Total

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OR

$ /mo

1 tire
2 tires
3 tires
4 tires
5 tires
6 tires
7 tires
8 tires
9 tires
10 tires

Please contact customer support. (877) 709-4442

Gladiator QR15-STB ST225/90D16 E/10PLY

1942042261 Gladiator QR15-STB ST225/90D16 E/10PLY Tires

Rims Not Included

Trailer - Bias

easy test score

8.0 Excellent

Per Tire:

$83.56

OR

$Loading /mo

Save $

Lightning Savings

Was $104.45

Strikethrough Pricing on Giga Tires

Our percentage-off promotions, discounts, or sale markdowns are customarily based on our own opinion of the value of this product, which is not intended to reflect a former price at which this product has sold in the recent past. This amount represents our opinion of the full retail value of this product today, based on our own assessment after considering a number of factors.

Estimated Delivery

Loading

Loading

Shipping

Installation available

Total

Loading

OR

$ /mo

1 tire
2 tires
3 tires
4 tires
5 tires
6 tires
7 tires
8 tires
9 tires
10 tires

Please contact customer support. (877) 709-4442

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Cross Section Width

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175
225

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80
90

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Wheel Diameter

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13
16

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Trailer (2)
Trailer - Bias (2)

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Gladiator - All Steel (5)
Gladiator - Armor 4S Transit (4)
Gladiator - Armor 4S (43)
Gladiator - QR15-STB (2)
Gladiator - QR25-TS Trailer (10)
Gladiator - QR35-TR Trailer Service (2)
Gladiator - QR40-ST (11)
Gladiator - QR55-ST All Position (5)
Gladiator - QR600-SV (3)
Gladiator - QR700-LT (11)
Gladiator - QR700-SUV (36)
Gladiator - QR75-OSD (4)
Gladiator - QR77-DL Drive Lug (1)
Gladiator - QR86MP (1)
Gladiator - QR900-MT (14)
Gladiator - QR92POS (1)
Gladiator - QR99-PD Premium Drive (5)
Gladiator - X Comp A/T (36)
Gladiator - X Comp AT ATR (2)
Gladiator - X Comp ATR (5)
Gladiator - X Comp G X/T (4)
Gladiator - X Comp H/P (25)
Gladiator - X Comp H/T ASII (57)
Gladiator - X Comp HP AS1 (74)
Gladiator - X Comp M/T (34)
Gladiator - X Comp R/S (1)
Gladiator - X Comp X/T (27)

115/110 (1)
91/87 (1)

C/6PLY (1)
E/10PLY (1)

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
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At Giga Tires, we’ve delivered unbeatable tire prices and service since 2014. With over 1 million tires sold, a #9 ranking in Newsweek’s America’s Best Online Shops for 2026, and 36K+ 5-star ratings, we offer over 45K+ products along with great promotions, discounts, and rebates. Enjoy fast shipping to your home or a local installer like PepBoys, Monro, and TireChoice. Backed by a 45-day return policy, we make tire buying simple, reliable, and affordable. Headquartered in California, we proudly serve drivers across the continental US.

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