Just came back from 2nd trip to Discount Tire, which did an outstanding job of removing my 2nd nail & patched up my rear right tire. Luckily it was in the repairable area.

So is there a max # of patched repairs per tire before it's unsafe...?

Thanks,

 

In theory, it really depends on how close the patches are to one another. The more patches near each other the less rigid the tire will be.

 

How far did you drive with the nail? Did your tpms sensors register a pressure loss? Do you recall what pressure it leveled at? I had a screw in rear tire this summer and dropped to 27 lbs.from 37 and then seemed to stop losing air. Drove about 1/4 mile on it.

 

It dropped from 37 psi to 29 in 2 weeks, after I got back from vacation. Pumped it up to 38 to limp to Discount Tire, Nail was about 5 o'clock to the 1st patch job at 12 o'clock, so almost opposite side, luckily both were right in the middle of the tread, so I guess Discount Tire thought it was OK to patch again.

 

Numbers of patches are irrelevant. It matters where the repair was, tread or sidewall, how close together, I wouldn't want patches over lapping, how large or jagged the hole was, and if the steel belts were exposed to water. Most times I would run a patched tire as I would any other. Now obviously I wouldn't try to drive a race car on a patched tire but normal highway speed limits, a repaired tire, even several patches should be fine. When you have to make a judgement call, I usually go on the safety side, if the wife and kids are riding in it. Just my thoughts. Don't be stupid.

Jack

 

I currently have two patches on one of my my rear tires (non-sidewall). Heavier XJ that is driven spiritedly. No problems.

All the best.

 

If I had a car with 'ordinary ' levels if performance I might consider tyre repairs.

Whenever I have owned high performance cars I would never consider tyre repair as I tend to use the performance

Some people will consider this extravagance but I prefer complete peace of mind with tyres, brakes, suspension etc.

I have replaced a nearly new PS4S with a few hundred miles on it when I got a nail

 

Obviously if you do burnout like I eat lunch every day, you'd want to replace the entire tire. Barring that, it's irrelevant how many patches you have, only the quality of the patch that matters.

 

I don't do burnout, but I do travel at very high speeds where it's legal, let's just say significantly in excess of 150mph.

I don't want a patched tyre failing due to stress and temperature from high speed use and know of no way to accurately determine the "quality of the patch" and would doubt that any tyre repair would be warranted to the same load and speed rating as an original tyre.

Your money and your choice

 

I patch my tires with a kit on the spot if the hole is through the belts. It takes less than a minute to rasp and punch in a plug. The hole needs to be rasped to a small clean circle to promote a good seal, after that the only quality aspect is if it holds air or doesn't. The patch isn't going to add structural integrity.

 

That would be a plug not a patch, then, yes?

Pirelli specifically does not endorse repairs of any kind. I believe they say the speed rating is void on a repaired tire.

 

I have two patched tires on my BMW 6 Series Gran Coupe and have had zero issues over the past year. It does, however, depend on where the puncture is and how it is repaired. In principle, there's nothing wrong with a patch.