Plavan

That is a blanket statement.
Depends on the car weight... I start at 28 pounds, like 32hot, too slippery over 34. Been doing it for 15 years the same way, but never have had a tire failure.
-Chad, <-Patrick Long agrees with me

paradisenb

My tires were not under inflated when they went bad. It was an enduro late in the afternoon after having run sprints earlier, so pressures were set. Tires were new that weekend. The Hoosier tire vendor at the track said it was belt separation, IIRC. Mine bubbled like the OPs pic.

One of them went bad first. I was bouncing all around on the back straight at Rd Atl. I drove one more lap thinking I had pickup. Then I came in and looked, but could not see anything (suppose the bubble was under the fender. I went back out, this time thing were twice as bumpy. Second rear had gone off. I retired to the paddock for further inspection, that is when I found the bubbles. I felt lucky they did not blowout on track.

Proper inflation is not a fixed number. It varies with car and weight. Probably even tire size.

J Smith

I have run the crap out of many, many Hoosier R6's (275/35/18) over the past 3 years and have never had any of these problems on my 3000lb E46 M3. I run them hard from heat cycle 1 usually until they show cords. Starting pressures as low as 28psi, usually shooting for about 36-38 hot.
Seems the issue is common on the rears of heavier 911's?

I love Hoosier, but I agree another manufacturer needs to step up and offer another option in a DOT tire that is readily available. Competition is a good thing. Hankooks may be great, but you can't find them anywhere. And BFG is close with the R1/R1S, but those tires are just not quite there to be able to compete with the R6/A6.

Whatever the issue is, I hope Hoosier makes good when these problems arise and it's clearly a manufacturing defect.

4forme

Mine were a 2011 DOT date. How do I get in on a group but to save a few bucks on some sets?

KOAN

I have run the crap out of many, many Hoosier R6's (275/35/18) over the past 3 years and have never had any of these problems on my 3000lb E46 M3. I run them hard from heat cycle 1 usually until they show cords. Starting pressures as low as 28psi, usually shooting for about 36-38 hot.
Seems the issue is common on the rears of heavier 911's?
I've only experienced the problem with my rears, 315/30/18

mooty

chad, most of our fat modern cars are 2700 lbs (cup: NO driver) or more. a DE car is likely 3200 (street RS: NO driver), if you re on 32 hot at 2100 lbs, then the late cars would be close to 38-40 hot on R6 no?

on my fat car i run 38. haven't had delam issues. i hope never.

jenk12m

So mooty your staring at 28-30 cold

333pg333

Seems pretty clear that Hoosier are not going to admit to any fault. Can't be coincidence all these recorded issues though. That's just in here too. Must be hundreds of them out there.

Still wondering if anyone is having similar issues with their R80/100 slicks???

Rokket

http://www.tirerack.com/images/pdf/warranty/HOOSIER.pdf

Holy crap man...That defective Hoosier damn near totaled the left rear quarter. BTW, I let a track buddy of mine "talk me into" starting a session around 36-38 psi....I spun in turn 16 on the warm up lap...WAY WAY WAY too high of a pressure cold. My other buddy took various readings at Sebring and we found that 22-23 lbs cold was optimal with nearly perfectly even readings across the treads. I really don't worry that much about the hot pressures...I still do the old school shoe polish trick to monitor the tire roll and tread wear.

I ran a 2:27 (SP3/NASA GTS-3) flat at Sebring on a set of Hankook C51's that finally corded after about 25-heat cycles. They seem to get stickier as they go, until you hit the cords. Problem with the Hankooks is that they don't make anything wider than a 275 and they are sold out as of 2-days ago.

I tried the C71 (Medium Compound) and was expecting to set some kind of land speed record...Spent more time doing the Scooby Doo peel outs and had my hands full after about 6-laps

mooty

depending on temp.
sometimes start at 26

Veloce Raptor

My probe pyrometer has shown that, on my M3, starting around 24 front 22 rear yield optimum results on most tracks. I will raise those 2 psi if it is below 45 degrees ambient.

C71's are worthles for track use IMO.

jakermc

YES!!! I've documented several blow outs in this forum in the past. They were our spec tire in the Ferrari CCR series and we saw many problems. Hoosier's response is go with bigger sidewall and increase pressure, but this makes you slow. I want a tire that goes fast AND doesn't blow up, I won't buy them again.

Bob Rouleau

On my RS, 36F 38R hot. No issues. As to Hoosier being liable, using them at well below the recommended pressures pretty much lets them off the hook I'd think. Reminds me of the old BFG R1 groove of doom days when guys were running then at 10-12 lbs below the recommended pressures and then complaining about premature failures.

At 38 lbs hot you need to really load the tires to make them stick but if you do, they stick. Drive like you're on street tires and they seem to behave like street tires

Astroman

Though I have not had a big "bubble" like the original post picture, I have had a bad time with my R6s getting "out of round." I've taken the tires to the Hoosier truck thinking I had lost wheel weights only to discover that I had a tire that was nowhere near round anymore... Obviously it creates horrible vibration.

It's frustrating. I would use the Hankooks in a second if they made my sizes.

FFaust

This likely is the "solution". Show-em who's the boss, and they will serve you well.