*Tread pattern & sidewall design may vary from pictures

New Tire

Cooper Discoverer Rugged Trek

315/70R17, 121/118S, E (10 Ply)
  • Season:  All Season
    • Load/Speed: 121/118S
  • PERFORMANCE: Rugged Terrain
  • Speed Rated Up to 112 mph
  • Load Range: E (10 Ply)

Log in or Join the Club to Get Member Pricing

MSRP $451.75
$409.99 Per Tire
Total for 4: $1639.96
Total for 4: $1639.96
You save  $41.76 (9%)
In Stock (10+)
Free Shipping
  • Fast Free Shipping on all OrdersFast & Free Shipping
  • 90 Day Money Back Guarantee on all orders90 Day Money Back Guarantee
  • Risk Free BuyingRisk Free Buying No Hassle Returns
  • Lowest Price GuaranteeLowest Price & Large Selection

Tire Specifications

  • SKU N1578748-99
  • Season All Season
  • Sidewall BSW: Black Side Wall
  • Car Type Light Truck
  • Size 315/70R17
  • Load Range E (10 Ply)
  • Brand Cooper
  • Load Index 121/118
  • Tread Depth 19/32
  • Performance Rugged Terrain
  • UTQG N/A
  • Treadlife/Warranty 55,000 miles
  • Run Flat No
  • Model Discoverer Rugged Trek
  • Speed Rating Description Speed Rated Up to 112 mph
  • Rim Diameter 17
  • Overall Diameter 34.4

Attention! Due to the size of the tires, Packages might be SEPARATED in the courier facility and not be DELIVERED on the SAME DAY, even though we do ship them together. Tracking information can be checked by logging on to the courier website with the master tracking number you will receive via email. For example, you can receive 3 tires in one day and the 4th one the next day or the day after, or one tire in one day and the second one day after. We understand that this is a big inconvenience for our buyers, however, this is ABSOLUTELY out of our control.


Cooper Discoverer Rugged Trek


  • Rugged terrain traction
  • Enhanced controllability
  • Longer lasting tread life
  • High on-road comfort levels


The Cooper Discoverer Rugged Trek is a rugged terrain, all-season tire manufactured for SUVs and light trucks. Cooper offers a 55,000 mile treadwear warranty with light truck sizes, and a 60,000 mile treadwear warranty with SUV sizes of this model.

The tire improves the rugged terrain performance. The aggressive tread design with the earth digger shoulders and the Stable Trac Technology enhance the traction on versatile on- and off-road terrain surface conditions. These tread elements improve the soft, loose and uneven terrain grip by providing the necessary surface contact and a higher number of biting edges. The tread's staggered blocks and high void ratio keep the footprint clean. They disperse water and slush from the footprint, preventing them from blocking the surface contact. Furthermore, the self-cleaning ability and the special stone blockades eject rocks stuck in the footprint, effectively preventing stone retention from harming the casing during the performance. This combination enhances the tire's on- and off-road driving safety levels.

The stabilized tread elements and the optimal block placement across the tread area improves the surface contact while the tires are in motion. As a result, the tire is able to greatly upgrade the on- and off-road terrain steering responsiveness and driving stability. In other words, the footprint's better and constant surface contact manages to improve the steering response time and accuracy to the driver's instructions, while it effectively secures the structural stability throughout the performance. The siping placement and the optimal shoulder blocks enhance the cornering and braking ability, optimizing the tire's overall maneuvering durability.

The detailed tread design and the all season compound improve the year round usability. The staggered block pattern with the zigzag siping pattern enhances the grip the tire has in dry, wet and winter conditions. The siping pattern and the staggered block edges enhance the number of biting edges gripping the road surface, allowing the tire's traction throughout the year. On the other hand, the stronger compound elements optimize the rubber flexibility in versatile temperatures, from the heat of summer to colder winter weather situations. The tread's wide groove pattern disperses water and slush from the footprint, in order to avoid hydroplaning during the tire's on-road performance. This results in a safer wet weather traction.

The model helps to extend its tread life. The stabilized tread elements and the stronger compound improve the usability. The footprint's stability prevents tread flexing from generating excessive pressure along the tread area. This allows the tire to evenly circulate the driving pressure across the footprint, avoiding irregular wear formations. The stronger compound elements are wear-resistant, which minimizes the overall treadwear rate. The reduced and even wear ensures a longer lasting service life.

The Discoverer Rugged Trek boosts the comfort levels during the on-road drive. The tread design was manufactured with the Whisper Groove technology which places specially designed sound barrier walls along the tread area. These sound barrier walls effectively channel airwaves though the footprint, without allowing their contact with the tread elements. As a result, the road and tread pattern noise are not formed and sound waves cannot reach the vehicle's cabin. As road disturbances do not ruin the passengers' driving enjoyment, the tire guarantees a quiet and comfortable driving experience.

Manufacturers recommend changing tires every 10 years. As long as tires are properly stored before they are sold, the year of their manufacture will not shorten their service life.


Shipping Information


If an order is placed before 1pm EST on a business day we ship the order the same day.

If it is placed after 1pm EST or over the weekend, we will ship the order out the following business day. Depending where you are located in the 48 contiguous states FedEx will take approximately 1-6 business days to deliver the tires to you from any of our three main warehouses located in Pennsylvania, Texas, and Florida and/or our smaller warehouses which are located across the country.

For a more specific time frame contact us via e-mail or telephone 866-480-8477.

Compatible Vehicles

IMPORTANT INFORMATION: Please note this is Original Equipment (O.E.) tire size only. The O.E. size is determined by the year, make, model and options of the vehicle. Original Equipment size data is the best information we currently have available to us. is not responsible for fitment errors. The most important aspect of purchasing a tire is its size, which cannot vary. It is buyer's responsibility to verify the tire size information. It is buyer's responsibility to verify whether a specific tire is suitable for a specific vehicle. However, this tire size may be fitted on other vehicles as well. To ensure that you are purchasing the correct tire size for your vehicle, please check the size of your currently mounted tires (locate on the tire's sidewall). The tire's sidewall also features the speed and load rating, indicating the speed and load capacity of the specific tire. The speed and load index can differ from the tires you currently have mounted on your vehicle up to a degree. Please check your vehicle's Owner's Manual or consult with your mechanic regarding the changes of your tire's speed rating and load index. If you have any questions regarding your tire size , speed rating and load index please contact us prior to purchasing and confirm with certified auto technician of any variance in speed and load index and sizes.

Friendly Customer Support

Need help choosing the right tires for your vehicle?


Our team of highly trained experts has the knowledge and passion to help.
Just pick up the phone and give us a ring. Or let's talk via live chat.

Our team of highly trained experts has the knowledge and passion to help.

8am - 6pm EST Monday - Saturday | Closed Sunday