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Buy 3 Select Tires, Get the 4th Free Instantly
Buy 3 Tires, Get 4th Tire Free Instantly. Receive a discount equal to the price of a single tire when four tires are added to the cart. Valid on select in stock tires only. Those tires for which discount is available will be identified in search results & product detail pages. All other tires and special order tires are excluded from this offer. Valid when scheduled for installation on and installation is completed between 2/23/17 through 3/9/17.

Buy 2 Tires, Get 10% Off
Receive 10% off 2 tires on your online purchase. Use promotional code ROLLOUT10 at checkout to receive discount. This offer cannot be combined with any other offers, coupons or rebates. Valid on select in stock tires only. Those tires for which discount is available will be identified in search results & tire detail pages. All other tires, as well as special order tires, are excluded from this offer. Valid if purchased online or installed by 3/9/17.

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  • Size: 255/55R18
  • Part #: 90000002928|
  • SKU: 437332|
  • (P) Passenger



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Cooper Discoverer H/T Plus

The Discoverer HT Plus is an extension of Coopers Discoverer HT SUV light truck touring line that features sport truck and original equipment sizing in a non-directional platform. It provides an excellent replacement for the 20-inch original equipment fitments on full size pickups and SUVs as well as plus fitments for drivers seeking to upgrade the looks and handling of their vehicles. Promo
  • Plus fitment for light truck users looking to upgrade their vehicles look
  • Optimized pitch sequence on tread elements for a quiet ride
  • See through grooves, wide lateral traction slots and high sipe density for excellent all weather traction
Cooper Tire founded in 1914 by Ira J. Cooper. Cooper is the 9th largest global tire manufacturer and 4th largest in the U.S.A. Cooper Tire's focus is on the replacement market, offering value, quality products and exceptional service to our customers. Cooper Tire manufactures a wide range of passenger, light truck and radial medium truck tires.

50,000 Miles
Tire Size
Truck and SUV255/55R18
Tire Type
Speed Rating
Load Index
Load Range


Safety Rating is a combination of two values: Load Index and Speed Rating for P-Metric and Euro Metric tire sizes; and Load Range and Speed Rating in the case of heavy duty LT (light truck) sizes.

Speed Rating is based on the speed that the tire is designed to be driven at for extended periods of time. All tires in the in the U.S. are designed to maintain legal U.S. speed limits. The speed rating of tires must match the maximum driving speed of the vehicle.

Load Index is used on P metric and Euro Metric sized tires and denotes a tire's load-carrying capacity at a specified inflation pressure. The load index is represented by a number, the higher the Load Index Value the greater the load the tire can safely carry. Vehicle manufacturers recommend a maximum load capacity based on a recommended minimum load index.
(P) Passenger
Tire Class


Tire Class reflects how the tire will be used. There are four major categories: All-Season, Max Performance, Summer-Only and Winter-Use.

All-Season tires are suitable for year-round driving in all weather conditions.

Summer-Only & Max Performance tires are specifically designed for high-performance driving. Tire compound, tread design and speed ratings all combine to hug the road and maintain grip. Summer tires by nature are not ideal for winter driving due to lack of siding to grip winter roads.

Winter-Use tires have tread compounds and patterns that are specially designed for grip on snowy or icy road surfaces. They are not suitable for year-round use. The rubber compound used will wear more quickly on dry, summer roads. It is recommended that winter tires are fitted as a complete set to avoid potential handling issues.
Everday Use
All Season
All Season

Off-Road Off-Road

Summer-Only Summer-Only

Winter-Use Winter-Use
Tread Type


Tread Type is an important consideration when choosing a tire. There are four main types: Passenger, Highway, All-Terrain and Mud-Terrain.

Passenger denotes a tread that is suitable for normal use, a good all-round tread for normal driving.

Highway is a tread type unique to SUV and truck tires. The tread is optimized for normal everyday driving on paved surfaces. These tires can be driven off pavement, but are not ideally suited for off road traction. Highway tread patterns deliver a quiet ride.

For light trucks and specialty vehicles, All-Terrain tread types provide better off-road traction than standard highway truck tires. There more aggressive tread tends to be less quiet on paved roads. All Terrain tires are suitable for everyday use.

Mud-Terrain treads are specifically designed with wider tread blocks and higher void ratios to gain traction in off-road conditions. Mud Terrain tires can generate higher noise levels and tend to carry lower mileage warranties than other tread designs.
Passenger Passenger
Highway Highway
All-Terrain All-Terrain
Mud-Terrain Mud-Terrain

UTQG - Uniform Tire Quality Grade

UTQG (Uniform Tire Quality Grade) is made up of three values: treadwear, traction and temperature.

Treadwear is a relative numeric score, based on manufacturer tests, showing how well a tire can be expected to wear compared to other tires. A higher score means a tire could be expected to wear better.

Traction measures the tire's ability to stop a vehicle on wet roads. It doesn't reflect a tire's acceleration, cornering, or hydroplaning performance. Traction grades range from AA (highest) to C (lowest).

Temperature grades the tire's ability to withstand heat build-up, with A being the highest grade and C the lowest.

A - Over 115 mph
B - Between 100 to 115 mph
C - Between 85 to 100 mph
Treadwear: 460
Traction Asphalt - gForce
AA - Above 0.54
A - Above 0.47
B - Above 0.38
C - Less Than 0.38
A - Over 115 mph
B - Between 100 and 115 mph
C - Between 85 and 100 mph

Drive / Ride Performance Characteristics

All tires have the following six performance characteristics, divided into three sets of trade-offs. In most cases, a tire may perform excellently in one characteristic but only standard in the other.
Excellent Ride Comfort & Excellent Handling
Handling: Get stiff side wall for precise steering and cornering but settle for a firm ride with increased road noise.
Ride Comfort: Enjoy a quiet, smooth ride but lose some cornering ability.
Standard Treadwear & Excellent Traction
Traction: Stop faster in wet conditions but expect a shorter tread life.
Treadwear: Get long, uniform wear across your tread pattern but expect less traction in wet conditions.
Standard Low Rolling Resistance & Standard High Speed Performance
High-Speed Performance: Get increased performance at higher speeds but sacrifice some fuel economy.
Low Rolling Resistance: Enjoy improved fuel efficiency but expect less high-speed cornering ability.


Rated 4.7 out of 5 by 46 reviewers.
Rated 5 out of 5 by Cooper Discoverer H/T PLUS This is the 3rd set of these Cooper tires I have put on my 2007 Dodge RAM 5.7 HEMI with the 20" wheel option. Best tire for this truck. 50,000K miles easy with even tire wear, rotating every 5K miles. Needed tires in a hurry. Order tires online on a Saturday late afternoon, and had them installed on Sunday morning. It was nice they were open on Sunday. August 29, 2015
Rated 5 out of 5 by quiet and responsive Only have a few miles on them but so far I can hear that they are quiet and steering response is excellent. Hopefully mileage will be good and wear also. August 3, 2015
Rated 4 out of 5 by Cooper tires Have only had them for 3 weeks. Too soon to tell. Everyone at Pep Boys was very helpful and professional. Bryan answered any and all questions I had. Only problem I'm having right now is I'm getting the run around from Cooper tires regarding my $50 rebate. Not too impressed with THEIR customer service at this point. July 14, 2015
Rated 5 out of 5 by So Far Very Good Tires So far so good. Definitely notice a nice ride compared to previous. Low road noise. Good grip to the road. Only have had them for a month or so. Pep Boys ONLINE was best price... really can save a lot buying through website. June 24, 2015
Rated 5 out of 5 by Awesome looking and performing This tire not only looks great on my 2013 Ram but the smooth quiet performance is awesome. Whether around town in running I95 it has been great. It has great grip on dry and wet pavement! If you are debating; stop and go for it. June 23, 2015
Rated 5 out of 5 by Great product at a great price I purchased these tires for my 2008 Dodge Ram 1500 Quad cab 1/2 ton pick up truck.These tires are an excellent value for the price. They are a very quiet and smooth running tire. They look great and perform very well. I would recommend them to anyone looking for an affordable replacement tire for their truck. June 18, 2015
Rated 5 out of 5 by Good Tires/Great Price! Bought these as replacements for my 2004 Dodge Ram 1500. The look great and handle well in the rain. The ride is a little hard but not terrible and road noise is at a minimum. Did not want to spend $900 plus on some other brands. Walked out the door with a great price (under $700) too! June 8, 2015
Rated 5 out of 5 by Great People, Fast Service, Fair Pricing! Walked into the Sanford location (near mall) purchased 2 new Cooper tires for my Dodge 1500. I was told the service should take about 30 mins. I waited in the nice, comfortable customer lounge. Clean restrooms, vending machines, big screen "Color" TV. I had just enough time to watch 1 episode of C.H.I.P.s (Total service time 25 mins.) Very Satisfied Customer! I will be back & I will tell ALL my friends too. (PapaSurf) May 31, 2015
Rated 5 out of 5 by Great Tires for the Dodge The service was great, Pep Boys did an excellent job! May 15, 2015
Rated 4 out of 5 by Great handling in wet conditions The quality and performance are the top points I considered. Great price and excellent customer service May 12, 2015
Rated 5 out of 5 by The product has a nice brand with great features. I am glad that the tires look good in my truck. I took a trip to San Antonio for a Christmas vacation with my family, it was great driving. I thank you for putting the new tires in my truck. It's worth! January 3, 2015
Rated 5 out of 5 by Excellent tires and service Tires are still fairly new, but so far I am very satisfied. Tires have a nice ride, and are very quite, even with the more aggressive tread pattern. I replaced Pirelli tires on my vehicle with the Cooper's. Great tires for the money. Service at Pep Boy's was also great. I bought the tires on line and scheduled the installation. Showed up at the store for the appointment, a service attendant was available, and the installation was completed within 40 minutes. December 29, 2014
Rated 4 out of 5 by Good tire for the money Good tire, not noisy and good traction in the winter . Second time buying these tires. Only knock is tire wear. I only got about 30,000 miles on my last set. They were still good for summer but not enough tread for winter. November 27, 2014
Rated 5 out of 5 by cooper discoverer h/t plus I bought these tires online and was very pleased with the tires, and price. The only down fall was the tracking number wasn't any good. But all in all it was a great deal. November 19, 2014
Rated 5 out of 5 by This tire is an excellent replacement for the stock tires on my 05 Dodge Ram Needed to replace the OEM Goodyears on my 05 Dodge Ram. They had tread left, but age was catching up with them and traction during wet weather was suffering. The rep at the Pepboys kept recommending this tire as a quality tire that would look good and meet my driving needs at an affordable price. So far the tires have proven to be an excellent choice. Won't rate durability since I only have a couple hundred miles on them so far. November 19, 2014
Rated 4 out of 5 by Good tire for the money On my second set and overall am happy with them. Traction, ride, noise are all good. Previous set lasted 42k with rotations November 19, 2014
Rated 4 out of 5 by appears to be a ggod tire I usually purchase Michelin, occasionally a Bridgestone; these are my first Coopers. Bought them to save money and just took a 1700 mile trip over three days. Drove in new snow and drove 80mph quite a bit. Very pleased with the price/performance aspect at this point, just don't know the long term mileage results yet. November 4, 2014
Rated 5 out of 5 by Great, Fast service! Got tires on sales and got professional, quick installation August 11, 2014
Rated 5 out of 5 by Cooper tires These tires are the best I've ever bought. July 17, 2014
Rated 5 out of 5 by Great tire at a great price Great price quick installation very happy July 15, 2014
Rated 4 out of 5 by Much better than OEM Michelin Ride is much better and no noticeable extra noise at highway speeds.. July 6, 2014
Rated 5 out of 5 by good tread life! I originally bought these tires back in Nov. of 2011. Here it is April of 2014 and I am shopping for another set! Really good treadlife on these! March 31, 2014
Rated 5 out of 5 by Tire service I will never get work done at any other place! Pep boys always has the best price, service and products. March 9, 2014
Rated 3 out of 5 by Too early to tell if it is the weather or the tires. Love the look. A little louder than my OEM tires and less forgiving. Sometimes I feel like I am in four wheel drive. I actually turned 4wheel on and then back off just to make sure. I know it has been very cold lately but I do hate waking up to the low air light in my truck. I really thought a new tire would make that stop. I guess not. It does go away the next time I start the truck. I hope that I can return to this review and upgrade my thoughts after some more miles. March 4, 2014
Rated 4 out of 5 by So far so good. Recently had these tires installed on a Toyota Tundra 4x4. Tires are quiet at highway speeds and ride well. Recent snow/ice event showed them to have good traction while in 4x4. Only a couple hundred miles on them but so far no complaints. February 3, 2014
Rated 5 out of 5 by good looking tires Very good value, better ride than the perelli scorpion ATR, and great service too. January 25, 2014
Rated 5 out of 5 by Great Tires and Great service! I have Ford F-150 Ecoboost 2011 and these tires are so much better than the original Pirelli tires were. And even better, the price and service in Pep Boys is something you can't beat! January 20, 2014
Rated 5 out of 5 by Look good and handle great Bought these tires a few weeks ago, they are great. Look good and handle great... January 20, 2014
Rated 5 out of 5 by perfect for my Land Rover These are very quite on the highway and excellent in the snow! December 11, 2013
Rated 5 out of 5 by I was very happy how easy it was This was the best. It was easy and the deal was great. November 30, 2013
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