Light Truck
Discoverer STT™
Product Overview
The Discoverer STT is Cooper’s premium high-void, off-road light truck traction tire designed for drivers who want the utmost in off-road traction. It is offered in a wide range of commercial and large diameter flotation sizes.
“Armor-Tek3®” Carcass Construction
The heavy duty carcass of the Discoverer STT is constructed of two radial polyester body plies and one angled polyester body ply to provide 3 full plies of protection for superior resistance to impact breaks and bruising.
Scalloped Shoulder Lugs
The shoulder tread lugs of the Discoverer STT are scalloped so that one section always has a clear shot at fresh ground for superb traction in soft surface applications and additional gripping power in off-road applications.
Resistant Tread Compound Rim Flange Protector
The Discoverer STT has a specially developed tread compound that helps resist the cutting, tearing and chunking commonly developed in extended off-road applications. Strategically placed in the lower side wall area, a raised rim protector helps protect the wheel and tire from hazards in off-road driving conditions while enhancing the Discoverer STT’s appearance.
Super Traction Tread
The new Discoverer STT’s computer designed, non-directional tread employs a combination of features including deep buttress lugs, notched and scalloped shoulder lugs, and a unique center traction zone to create a bold, aggressive tire for tough off-road applications.
Tire Sizes and Specifications
Discoverer STT™
| Tire Size |
Service Description |
UTQG |
Load Range |
Sidewall |
Approved Rim Width |
Measured Rim Width |
Section Width |
Overall Diameter |
Tread Width |
Max Load |
Tread Depth |
| 30X9.50R15LT |
104 Q |
|
C |
OWL |
6.5 - 8.5 |
7.5 |
9.8 |
29.7 |
7.8 |
1985 |
20 |
| 31X10.50R15LT |
109 Q |
|
C |
OWL |
7 - 9 |
8.5 |
10.85 |
30.75 |
8.3 |
2270 |
20 |
| 32X11.50R15LT |
113 Q |
|
C |
OWL |
8 - 10 |
9 |
11.4 |
31.76 |
9 |
2535 |
20 |
| 33X12.50R15LT |
108 Q |
|
C |
OWL |
8.5 - 11 |
10 |
12.08 |
32.76 |
9.7 |
2205 |
20.5 |
| 35X12.50R15LT |
113 Q |
|
C |
OWL |
8.5 - 11 |
10 |
12.2 |
34.76 |
10 |
2535 |
20.5 |
| LT235/85R16 |
120 Q |
|
E |
BLK |
6 - 7.5 |
6.5 |
9.7 |
31.8 |
7.3 |
3042 |
18 |
| LT225/75R16 |
115 Q |
|
E |
OWL |
6 - 7 |
6 |
8.7 |
29.53 |
6.7 |
2680 |
17.5 |
| LT245/75R16 |
120 Q |
|
E |
BLK |
6.5 - 8 |
7 |
9.45 |
30.7 |
7.6 |
3042 |
18 |
| LT265/75R16 |
123 Q |
|
E |
OWL |
7 - 8 |
7.5 |
10.1 |
32 |
8.25 |
3415 |
18 |
| LT285/75R16 |
126 Q |
|
E |
OWL |
7.5 - 9 |
8 |
11.3 |
33.1 |
8.85 |
3750 |
18.5 |
| LT315/75R16 |
127 Q |
|
E |
OWL |
8 - 10 |
8.5 |
11.92 |
34.47 |
9.8 |
3860 |
20 |
| LT255/70R16 |
108 Q |
|
C |
OWL |
6.5 - 8 |
7.5 |
10.56 |
30.31 |
8 |
2205 |
17.5 |
| LT305/70R16 |
124 Q |
|
E |
OWL |
8 - 9.5 |
9 |
12 |
33.07 |
9.8 |
3525 |
19 |
| 33X12.50R17LT |
114 Q |
|
D |
OWL |
8.5 - 11 |
10 |
12.54 |
32.76 |
9.8 |
2600 |
20.5 |
| 35X12.50R17LT |
121 Q |
|
E |
OWL |
8.5 - 11 |
10 |
12.67 |
34.76 |
9.8 |
3195 |
20.5 |
| 37X12.50R17LT |
124 P |
|
D |
BLK |
8.5 - 11 |
10 |
13.1 |
36.9 |
10 |
3525 |
23 |
| LT245/70R17 |
119 Q |
|
E |
BLK |
6.5 - 8 |
7 |
9.6 |
30.7 |
7.6 |
3000 |
18 |
| LT265/70R17 |
121 Q |
|
E |
OWL |
7 - 8.5 |
8 |
10.8 |
31.9 |
8.25 |
3195 |
18 |
| LT285/70R17 |
121 Q |
|
E |
OWL |
7.5 - 9 |
8.5 |
11.5 |
33 |
8.85 |
3195 |
18.5 |
| LT295/70R17 |
121 Q |
|
E |
BLK |
7.5 - 10 |
8.5 |
11.8 |
33.45 |
9.4 |
3195 |
20.5 |
| 35X12.50R18LT |
123 Q |
|
E |
OWL |
8.5 - 11 |
10 |
12.5 |
34.76 |
10 |
3415 |
20 |
| LT275/70R18 |
125 Q |
|
E |
BLK |
7 - 8.5 |
8 |
11 |
33.35 |
8.8 |
3640 |
20.5 |
| LT275/65R18 |
123 Q |
|
E |
OWL |
7.5 - 9 |
8 |
10.98 |
32.32 |
8.45 |
3415 |
18 |
| LT325/65R18 |
127 N |
|
E |
BLK |
9 - 12 |
9.5 |
13.5 |
34.75 |
10.8 |
3860 |
21 |
| LT305/60R18 |
121 Q |
|
E |
BLK |
8.5 - 11 |
9 |
12.09 |
32.64 |
9.8 |
3195 |
20.5 |
| LT325/60R18 |
124 N |
|
E |
BLK |
9 - 12 |
9.5 |
13.3 |
33.22 |
10.8 |
3525 |
21 |
| 33X12.50R20LT |
114 Q |
|
E |
BLK |
8.5 - 11 |
10 |
12.49 |
32.66 |
9.8 |
2600 |
20.5 |
| 35X12.50R20LT |
121 Q |
|
E |
BLK |
8.5 - 11 |
10 |
12.5 |
34.66 |
9.8 |
3195 |
20.5 |