Cooper Discoverer STT's
- Thread starter LXCRSR
- Start date
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Siped?
I thought the new STTs came siped. See the picture.
uzj100
I thought the new STTs came siped. See the picture.
uzj100
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e9999 said:
Like the lug nuts?
No, in the actual tire. See the picture. See the cuts in the lugs, that means the lugs are siped.
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uzj100 said:
Wonderful, I learned something new today.
alia176
SILVER Star
uzj100 said:
Shouldn't you be getting a quote for a set of five tires?
You are the second person that recommended 5 tyres.
Yes get five tires, you really need to have the same size spare as your other tires to prevent possible damage if you use the spare. Also you can run in a 5 tire rotation and your tires will share miles and last longer.
My local tire dealer (NC) has a set of STT's (4)37X12.50X 17 for 350$ I saw them yesterday and they look like a hella deal.
hULLHOPPER said:
Dang, too bad they are 17 inchers.
- Thread starter
- #31
With respect to the siping... True, the center lugs have one sipe in them. However, I was looking for a little more grip on snow and ice. The siping I had added put multiple cuts in the center lugs, spaced approximately 1/4-inch apart.
alia176
SILVER Star
firetruck41 said:
I just went through something similar on behalf of a friend locally. The tire dealer quoted me for a set of four tires. Those guys can be such (insert adjective here) *&^%@#s. Why aren't they trained to at least remind the purchaser about not having the spare tire the same size as the OTHER FOUR!
K
KAZOO
Guest
I have run Cooper S/T's 275 r16's on the 80 for the last three years with no complaints at all. Quiet comfortable ride on the highway, stick like a studded tire on the snow and ice covered roads {sipped} and have yet to be dissapointed at the Off road performance of these all around tyres.
Will be installing another set in a 315 r16's size on Friday. I am curious if these will perform as well as thier little brothers did? If anyone cares I will post up some time in the future.
Will be installing another set in a 315 r16's size on Friday. I am curious if these will perform as well as thier little brothers did? If anyone cares I will post up some time in the future.
Siping = cutting slits in the tire surface to improve traction. Best done perpendicular to the line of travel (sideways across the tire), and on inner lugs only, as siping the shoulder lugs may encourage chunking.
Many tire are now siped at the factory - the Michelin CrossTerrains that I run on my Ford are sipped. Lots stickier than standard tires.
FWIW.
M
Many tire are now siped at the factory - the Michelin CrossTerrains that I run on my Ford are sipped. Lots stickier than standard tires.
FWIW.
M
OT...
When you have the tires sipped, do you have to tell the Tire guys how you want them sipped? Or do you just say, please sippe the tires? And they will do it correctly?
Just curious...THANKS
When you have the tires sipped, do you have to tell the Tire guys how you want them sipped? Or do you just say, please sippe the tires? And they will do it correctly?
Just curious...THANKS
KAZOO said:
hey,
I've got the S/Ts in 315, and I really like them. They perform pretty well off road, and still have decent road manners. I haven't had them on much ice and snow, though, since I live in a little steambox called Houston. I like them, but will likely try out the STTs next time, just because they look like they'll clean out better when I get them packed with sand/mud (it's ubiquitous down here, even though IH8 it.)
sorry for the hijack.
What is the recommended pressure on the 285 STTs? I am sitting at 40 psi right now.
Thanks,
uzj100
Thanks,
uzj100
blupaddler said:
Hi Robb, that would probably be me (?) I have received some email inquiries on these tires, so I figured I would post up my thoughts thus far. Keep in mind that I have these on a '98 Xcab Tacoma that is pretty loaded up with stuff and probably weighs in the mid 5,000 lb range. I am using 32x11.5x15 on Toyota alloy wheels.
Copied from an email I sent out...
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Thus far, I am extremely happy with the Cooper STT tires. Besides the obvious pavement, I have tried them in the rain, snow, sand, and all manner of off-road trails including rock crawling. I haven't had them in treacherous mud yet, just light mud that goes along with snow-melt on trails. In all conditions I have had them in, they have performed really well. They excel at slow rock crawling traction. This may have something to do with the GVW of my truck, as I have a great deal of contact pressure. I think they are probably not quite as soft of a tire as the Goodyear MTR. These tires have balanced well and are nice and round (no hopping on the road). I guess my only complaint would be that I have experienced some odd feedback (steering wander) when braking, or shifting gears at higher speeds. This has lessened a great deal now that the tires have some wear on them and I think it is pretty much over with. My guess is that the very pronounced sidewall lugs were being either compressed or lifted depending on braking or shifting, causing variations in the tracking of the tire due to sidewall lug contact with the road surface. I would expect to get 35,000 - 40,000 miles out of these tires. However, I usually replace my tires at around 50% tread depth so I will just measure remaining tread and when at 50% will check the mileage and double that to see what the actual lifespan of a set of tires on my truck is. The last set I had (Goodyear MTR's) were at 20,000 miles with 50% useable tread remaining. I expect the Coopers to do at least that good. I have also experienced a slight increase in fuel economy over the MTR's. Probably around 1-2 mpg with mixed city/hwy driving. I currently have 8,400 miles on the tires. Tread depth on my size (32x11.5x15) when new is 20/32" I am currently at 15/32" which is about 83% of useable treadwear.
****************
I might just add that I checked the mileage referenced above, on a recent 5-day trip from AZ to CO with mixed driving conditions. I managed to get a few tanks of fuel to average at 17mpg or above, and one tank at 18mpg. The best I had been able to get with the MTR's was about 16.5 with an occasional tank at 17 or better, and sometimes as low as 13's.
Also, I really liked that fact that these tires came with factory siping across the entire tread width, which saved me some $$ from having to add siping at the tire shop. The factory sipes are perfectly centered in the tread blocks (where the siping machine is indiscriminate on placement) so I have had zero tears or chunking due to the sipes which is nice.
A pic of tire testing...
hULLHOPPER said:
How much tread was left? How much to ship to Boise, ID?
Thanks!
LXCRSR said:
Great looking tire, I've always wondered how they performed and held up to abuse.
On a side note, my 80 is still stock but I live in your neck of the woods and I would love to go wheeling with you sometime. Let me know where you think a stock 80 with lockers can roam since I haven't done alot of wheelin in Idaho since I've been here.