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The last two sets I've purchased have only given me one day (let's say 120-150 minutes) before failing in the front. Same failure - I'm cording them, but not because it's wearing down to the cords, but because the rubber is pulling away from the cords. Needless to say, this is unsustainable. Both times it was the outside front tire, not the inside front tire or the rears. I run 265/35-19 in front and 295/35-19 in the rear.
I have the full complement of suspension mods - camber plates, toe links, Swift springs. I'm running -3.5 in front and -2.5 in back. I'm a reasonably fast driver but not the fastest by any measure.
Last weekend, I was running them at 35 psi front and 34 back measured after a long cooldown lap before I got back to the trailer and could throw a gauge on them, so they are several pounds higher than that at full boogie, I'd imagine.
For anyone running R7s, do you have any suggestions about what I could be doing wrong? For what it's worth, I've run two sets of Pirelli DH takeoffs and did not experience this problem with either set. I corded both of those because there was no rubber left, not because the rubber pulled away from the carcass. Haven't had this problem with street tires, either - Cup 2s or RE-71s.
The only thing I can come up with is that I'm actually driving with far more forced understeer than I'm aware of. If that's the case, then it's back to RE-71s until I clean up my act.
It's about an inch long, running parallel to the direction of tire rotation, about 2 inches from the outside edge of the tire.
Bigger pic of the tire would help... that looks more like a gouge in the tire to me... as in running over something?
Maybe a popped blister?
I'm not seeing any large marbling that would indicate overstressing the tire, and your pressures are good (R7's like 40ish hot).
With the exception of the defect, of course, tire wear looks very uniform to my eye. I'm leaning towards characterizing it as rubber pulling away, as opposed to a gouge because that's the diagnosis my setup shop gave me for the last front that had the same symptom.
I suppose another suggestion would be "you need to run -4+ degrees up front", but I also drive this car on the street so that's tantamount to saying "you can no longer drive this car on the street". Honestly, I'm not willing to go there. I'd sooner drop back to street tires.
I also agree with the gouge theory...I can't see any other issue on the tire. If it was a defect or a suspension/ setup problem my guess we would be seeing more of these around the full circumference of the tire.
Looks like the problem is on the outside....both sides exhibit the same problem or just one side of the car?
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Hoosier R7 problems
