Discoverer STT PRO™

The Discoverer STT PRO is the most extreme all-season, off-road tire Cooper offers to date, providing remarkable off-road performance without sacrificing on-road traction.

Tread design helps to prevent stone retention
Amore Tek3 construction for added tire durability
the shoulder of the tire was designed with soft surface "cleats" and mud "scoops"

Tire Sizes & Specifications

Features & Benefits

Unique hybrid 3-2 inner tread pattern reduces noise and increases stability.
Alternating shoulder lugs enhance traction in mud and soft surfaces.
Anti stone retention resists stone retention which helps to increase the life of the tire.
Mud release dimples aid in keeping the tread pattern free of loose soil.

Customer Reviews

Sizes & Specs

Discoverer STT PRO™

Tire Size	Service Description	Load Range	Sidewall	Approved Rim Width	Measured Rim Width	Section Width	Overall Diameter	Tread Width	Max Load	Tread Depth (1/32")
30X9.50R15LT	104Q	C	RWL	6.5 - 8.5	7.5	9.6	29.57	7.72	1985	19
31X10.50R15LT	109Q	C	RWL	7 - 9	8.5	10.7	30.75	8.5	2270	20
32X11.50R15LT	113Q	C	RWL	8 - 10	9	11.7	31.57	9.09	2535	20
33X12.50R15LT	108Q	C	RWL	8.5 - 11	10	12.2	32.72	9.8	2205	21
35X12.50R15LT	113Q	C	RWL	8.5 - 11	10	13.1	34.57	10.08	2535	21
LT215/85R16	115\112Q	E	BLK	5.5 - 7	6	8.5	30.59	6.34	2680	18.5
LT235/85R16	120\116Q	E	BLK	6 - 7.5	6.5	9.6	31.89	7.13	3042	18
LT225/75R16	115\112Q	E	BLK	6 - 7	6	8.9	29.49	7.05	2680	18
LT245/75R16	120\116Q	E	BLK	6.5 - 8	7	9.6	30.71	7.52	3042	18
LT265/75R16	123\120Q	E	RWL	7 - 8	7.5	10.7	31.89	8.43	3415	18.5
LT285/75R16	126\123Q	E	RWL	7.5 - 9	8	11.2	32.99	8.82	3750	19
LT315/75R16	127\124Q	E	RWL	8 - 11	8.5	12.6	34.53	9.69	3860	20.5
LT305/70R16	124\121Q	E	RWL	8 - 9.5	9	12.3	32.99	9.88	3525	19.5
LT255/75R17	111\108Q	C	RWL	6.5 - 8.5	7	10.3	31.89	8.11	2405	19
LT265/70R17	121\118Q	E	RWL	7 - 8.5	8	10.7	31.93	8.5	3195	18.5
LT285/70R17	121\118Q	E	RWL	7.5 - 9	8.5	11.5	33.03	8.98	3195	19
LT295/70R17	121\118Q	E	RWL	7.5 - 10	8.5	12	33.46	9.69	3195	21
LT315/70R17	121\118Q	E	RWL	8 - 11	9.5	12.6	34.57	10	3195	21
LT305/65R17	121\118Q	E	BLK	8.5 - 11	9	12.3	32.68	9.88	3195	21
37X12.50R17LT	124Q	D	BLK	8.5 - 11	10	13	36.77	10.2	3525	22
37X13.50R17LT	121Q	E	BLK	8.5 - 11	11	13.3	36.77	10.98	3195	22
40X13.50R17LT	121Q	C	BLK	8.5 - 11	11	13.6	39.76	10.98	3195	22
LT275/70R18	125\122P	E	RWL	7 - 8.5	8	11.3	33.31	9.09	3640	20
LT295/70R18	129\126P	E	RWL	7.5 - 10	8.5	12	34.49	9.69	4080	21
LT305/70R18	126\123Q	E	RWL	8.5 - 10	9	12.4	35.08	9.88	3750	21
LT275/65R18	123\120Q	E	RWL	7.5 - 9	8	10.9	32.28	8.82	3415	19
LT285/65R18	125\122Q	E	RWL	8 - 10	8.5	11.8	32.91	9.49	3640	19
LT325/65R18	127\124Q	E	RWL	9 - 12	9.5	13.7	34.69	11.1	3860	21
LT305/60R18	121\118Q	E	RWL	8.5 - 11	9	12	32.68	10.08	3195	21
37X13.50R18LT	124Q	D	BLK	8.5 - 11	11	13.3	36.77	10.98	3525	22
38X15.50R18LT	128Q	D	BLK	11 - 13	12	15.4	37.87	12.28	3970	21
LT275/65R20	126\123Q	E	BLK	7.5 - 9.5	8	10.9	34.49	9.09	3750	19.5
LT295/65R20	129\126Q	E	BLK	8 - 10	8.5	11.7	35.43	9.65	4080	19.5
LT295/60R20	126\123Q	E	BLK	8 - 10	8.5	11.5	34.29	9.65	3750	19.5
LT295/55R20	123\120Q	E	BLK	8 - 10	9.5	12.3	33.07	10.2	3415	20
LT305/55R20	121\118Q	E	BLK	8.5 - 11	9.5	12.4	33.5	10.43	3195	20.5
35X12.50R20LT	121Q	E	BLK	8.5 - 11	10	12.4	34.69	10.2	3195	21
37X12.50R20LT	126Q	E	BLK	8.5 - 11	10	12.6	36.69	10.31	3750	21
35X13.50R20LT	122Q	E	BLK	8.5 - 11	11	13.2	34.57	11.1	3305	21
37X13.50R20LT	127Q	E	BLK	8.5 - 11	11	13.3	36.85	10.79	3860	21
38X13.50R20LT	123Q	D	BLK	8.5 - 11	11	13.6	38.19	10.79	3415	21
38X15.50R20LT	128Q	E	BLK	11 - 13	12	15.4	37.83	12.28	3970	21
LT325/50R22	122Q	E	BLK	9 - 12	10	12.9	35.12	11.38	3305	21
35X12.50R22LT	117Q	E	BLK	8.5 - 11	10	12.3	34.76	10.39	2835	21
37X13.50R22LT	123Q	E	BLK	8.5 - 11	11	13.4	36.89	10.79	3415	21