On the subject of the Cooper Discoverer STT M/T for OWL (
You haven't received a reply, so I hope I can ask you a question:
How are you liking your STT's? On pavement? Off pavement? Noise, mileage, overall handling? What tire pressure are you averaging?
I have accrued over 20,000 on a set of 315/75r16 "E" rated STTs
with a rotation of all 5 @ each oil change (3000 miles) intraval , they are at approximately 65-70% tread left and superb off road on rocks - big , nasty granite/flint/limestone rocks - , mud , gravel & dirt/snow. Noise in minimal.
They are absolutely well balanced with the worst being at around 8-9 oz of weight required. Initially, they were chosen in this "E" rated , overkill size for my JKUr which with all off road gear packed, weighs 4800 lbs. The "E" rated 315/75r16 ( I recall 34.68 initial measurement
) was chosen for the tri-guard sidewall protection and took about a half year until it softened up . I drive at 28.5-30 psi highway for a few extra MPGs ( I run non-ethanol only in 89-90 grade
) stretched out on trips. With the Superchips FlashPaq this improved by another few MPG ending in my getting about 18-21 HWY /14-15 city mileage.
They are heavy
and the durability has surprised me endlessly
with its ability to fold over itself and take abuse at my offroad PSI ( 8- 12 psi depending upon terrain
) on non beadlock Level8 strike 5s . Together,they come in at just under 96lbs per wheel/tire in this combination.
Would I refer someone who offroads in the S.E. US a set of these if they want 35s? Heck yes. They are good-to-great on road*
They have good wear tendencies and you could get a set to last 30k-40k before being in need of replacing. Keep in mind, I have a bit of an OCD weight self-restriction issue in-that I never wished my 4 door to exceed over 5000lbs. I worked very hard to get the weight down from stock and build the Jeep up with many aluminum parts to get it under 5000lbs while still being very well protected ( $) but the primary "issue" I can report after 20,000+ miles on the STTs is that as they have worn to about the size of a 33"-34" tire . Thus, they don't fill the trimmed stock fenders of my wheel well & my 3" Synergy Stage II lift . They have the look of being too small now. I had always planned on upgrading to Coopers 325/80r16 but they have discontinued that 36" model.
Plus, I want the slightly higher clearance achieved by 37s ( yes, I have been in spots where an extra inch of tire would have allowed me to make it without skid-plate dragging
) . So, before this set gets so used ( abused) that I cannot get anything by selling them , I have been doing homework and can get the same wheel in a 17" with 4.50 BS and 5-5.0 bolt pattern ( btw: the Level 8 strike 5s are a great light-weight cheap Chinese wheel
) instead of my 16"s with a set of the new BFGoodrich KO2 in a 37"x12.50.17" "D" rated size that will only weigh 5lbs more per corner than my 35's . I hope to be able to sell my 35" STTs and wheels to recoup a bit of the money on the new upgrade but it isn't required.
I figure someone in my vicinity with stock wheels and tires will want to move to 35's and these were a fabulous first upgrade as I ran these initially with just the TeraFlex levelling kit and an extra 1" spacer upfront to eliminate rake.
(* the only places I will give a negative input on STTs are
(a) they do not exceed well in in icy conditions of under 1/2" ; more ice or snow and they are fine. Under that amount & they struggle to maintain grip.
(b) when it is misting or the asphalt is just slightly wet- not a deluge , where they are fine- just very a light misting of H2O and they are like they are on ice.I have wound up inverted 180 degrees around by taking low speed 90 degree left hand turn at an intersection ( I have a 3.8l) and pucker factor 09 kicked in as I was facing traffic I was previously in front of. take off from 2nd gear prevents this torque overshoot & backend swing around....finally,
(c)the siping is perfectly fine up until 15,000-20,000 miles; then the middle block sipes begin to wear and they do not go all the way to bottom of the knobbies so I had to "enhance" the existing sipes - I did not have to go so far as getting a tire groover/siper but instead found that very consistent use of a dremel cut-off wheel for metal re-establishes the original siping and brought back the wet performance on-road. No, I did not hack-up my tires with a Dremel. I simply brought back the sipes in the locations that they originally were in & that were disappearing in middle of the tread blocks. Not more than 1/8" - 1/4" depth and afterwards, they were as grippy on road as they had been new.
I now realize that while durable, the "E" rated metric 35" ( 315/75r16) was slightly overkill for my rig and while great fun to not think about your tires at all while wheeling very hard obstacles, I think the D rated 37" KO2 will be more pliable when new and take less time to get broken in. Plus, they will be an All Terrain and suited for road as well as off road better and likely give me 40-50 K of life instead of 30-40k of the MT. My rig is 80% offroad ande 20% street /highway, I should have mentioned.
here is a sorta- decent image of my piggy w/ the Cooper STTs in 315/75r16 "E" rated after 2+ years and 22,000 miles of which 15-16,000 were street use. I now work from home so it is used for four road trips per year to Georgia from Tennessee and other than that it is for off road use.
another , upclose shot of the STT after 21k miles and hard off road use. Packed with Tennesse/Alabama red-clay-mud here....
<edit for forgotten info>
I failed to mention, if anyone likes this 315/75r16 combo with the Strike 5 wheels, there are fabulous package deals at DesertRat.com for these. Road Force balanced and mounted , delivered to door I think I paid just at $2000 with shipping for all five.
Discount Tire Direct may have similar/better/same type deal, but DesertRat was great to deal with. Just an FYI.