Cooper Discoverer STT Pro Review - 315/70R17

Summary

In this Trail Recon video, the host shares his experience after 500 miles and 6 hours of off-roading with the Cooper Discoverer St Pros on his Jeep. He discusses the tires' aggressive tread, suitable for both mud and rocky trails, and their impressive performance as daily drivers. The host also addresses concerns about road noise and comfort, noting that the tires are surprisingly quiet and comfortable for their size. He shares modifications made to his Jeep, including cutting rock rails and recalibrating the speedometer with a flash calibrator. The video concludes with a positive assessment of the tires' drivability, off-road traction, and overall performance, recommending them to viewers considering an upgrade.

Takeaways

• 🚗 The speaker installed Cooper Discoverer St Pros on their Jeep and has been using them for over two weeks.
• 🔪 They had to cut the rock rails to accommodate the larger tires and prevent rubbing during flexing.
• 🔗 They recommend watching a video by Jeep Army USA for guidance on cutting rock rails.
• 🛠️ They used a flash calibrator by Super Chips to recalibrate the speedometer for the larger tire size.
• 🌲 The tires are 315/70R17, with a 34.5-inch diameter, 12.6-inch width, and weigh about 66 lbs each.
• 🛡️ The tires have a triple-ply sidewall for puncture resistance and an aggressive tread design for off-road traction.
• 🏞️ The speaker commutes 60 miles round trip daily and found the road noise to be acceptable, not requiring any adjustment to their radio volume.
• 🚀 The comfort level is good, and they adjusted the tire pressure to soften the ride, though they plan to optimize it based on tread wear.
• 🛤️ On the road, the handling is smooth, and there are no steering issues.
• 🏔️ Off-road, the tires performed excellently on sand, rocks, and climbs, with noticeable grip and ease in overcoming obstacles.
• 💨 With the larger tires, there is a slight decrease in acceleration and an expected drop in fuel economy from 16.2 to 15.5 mpg.

Q & A

What is the main topic of the video?

The main topic of the video is a review of the Cooper Discoverer St Pro tires after using them for 500 miles and 6 hours on the trail.

What modifications did the speaker make to their Jeep after installing the new tires?

The speaker had to cut the rock rails to prevent rubbing when flexing the Jeep on ramps and also got a flash calibrator by Super Chips to recalibrate the speedometer.

What are the tire specifications mentioned in the video?

The tires mentioned are Cooper Discoverer St Pros, 315/70R17, with a height of 34.5 inches, a width of 12.6 inches, and a weight of about 66 pounds each.

What concerns did the speaker have about the new tires in terms of daily driving?

The speaker was concerned about road noise and comfort while commuting with the new, larger, and more aggressive tires.

How did the speaker address the concern about road noise?

The speaker found that the road noise was not as loud as expected and was not obnoxious, even after adjusting the tire pressure for a softer ride.

What was the speaker's experience with the comfort level of the new tires during daily commutes?

The speaker found the comfort level to be satisfactory after slightly lowering the tire pressure and did not experience any issues with steering or handling.

What was the off-road performance of the tires like according to the video?

The off-road performance was excellent, with the tires providing great grip on rocks and making it easier to climb obstacles, especially when aired down to 18 PSI.

How did the larger tires affect the Jeep's acceleration and engine performance?

The larger tires increased the rotating mass, which slightly slowed down the acceleration and made the engine work harder, particularly when accelerating uphill onto the freeway.

What was the impact of the larger tires on the Jeep's fuel mileage?

The fuel mileage dropped from approximately 16 to 15.5 miles per gallon, which was less than the speaker expected.

What is the speaker's overall assessment of the Cooper Discoverer St Pro tires?

The speaker is very satisfied with the tires, praising their look, drivability, and off-road traction, and recommends them to others considering a similar tire upgrade.

What advice does the speaker give for those interested in the same tires?

The speaker suggests that viewers should consider the Cooper Discoverer St Pros for their off-road capabilities and daily drivability, and to watch a video on how to cut rock rails if needed.