The OEM tires are not "run flats", they are self sealing. There's a difference.

While not true run flats, they can be repaired: Michelin Selfseal® Tires Inspection & Repair Procedures

 

My Vipers all came with Michelin "RunCraps" from the factory. We never repaired those tires, always replaced them. RunFlats are a super hard compound.
In the future, if I have an issue with the Lyriq tires, i'd still probably replace them rather than repair. It's just not worth it to me to deal with...

 

You've got your "run craps" mixed up. The run craps were the Goodyear run flats. The current Michelin ZP (Zero Pressure) tires are very good. I've been running Michelin ZPs on my Corvettes since 2014. I had 1 or 2 of them repaired with the recommended patch/plug combo. Discount Tire dismounted/repaired/remounted and balanced them for free (even though they were not purchased there).

 

Nope hon, I don't have my RunCraps mixed up. Maybe thats what they gave you Vette boys... but we had Michelin RunCraps 🤣
Since 2002...

 

Yes, Goodyear run craps were on the C5 and C6 Corvettes (1997-2013) and they were terrible. The MIchelin ZPs used since 2014 are light years ahead of the Goodyears. Perhaps early Michelin run flats on the Viper were also terrible, but the current ZPs are very good.

 

I got a large bolt (maybe 1/4") through my Stock LYRIQ 20" wheel tire, right through the main part of the tread. I dropped it off at Cadillac after hours with a note. "Bolt through left front tire - please repair or replace." I was kind of hoping that they'd replace it just for peace of mind. They chose to repair it at a cost of maybe $60.

The tire really got tested soon after when I accelerated to pass the car in front of me on the highway and the driver ,moments later, decided he too wanted to change lanes - into mine and without looking. He almost cut me off with a 30 mph speed difference from about 20 feet ahead. I slammed the brakes and the car slowed surprisingly fast for such a heavy vehicle and also remained fully confident and in control.

I don't doubt that tire repair any more. I will be even happier when they rotate it to the back at the first service.

 

Yes. They can be patched. But they have to be done from the inside for a proper repair. Dealerships can do this.

 

I got the old tire back from the dealer and took it to Discount Tire, they looked at it and said it could be repaired. So I will now have a spare at home to use in the future. As for why the Cadillac dealer refused to repair it, the head of service writer said it's Cadillac policy to not repair them but replace.

 

I assume they did a combo patch/plug repair. Discount Tire is normally very good.

 

Discount tire has always dismounted and repaired my flats from the inside for free, even if I didn't buy from them. That's crazy good customer service

 

Yep, no charge for doing the repair, and it's been at lease 14 years since I bought anything from them.

 

I will dissent from the rest of the posters just because I've encountered it. Depending on the type of nail or screw, if it leaves too big a hole, they CANNOT be repaired. They will however seal long enough to get you to the dealership. I honestly find that the Lyriq handles so much better with traditional tires, I switched them out for them.

 

I will dissent from the rest of the posters just because I've encountered it. Depending on the type of nail or screw, if it leaves too big a hole, they CANNOT be repaired. They will however seal long enough to get you to the dealership. I honestly find that the Lyriq handles so much better with traditional tires, I switched them out for them.

That's true of any type of tire - normal tire, run flat or selfseal. There are other situations that also make any tire type not repairable - too close to sidewall, internal tire structure damaged, overlap with another repair, etc. Regardless of the tire type, the repair should always involve dismounting the tire to inspect for structural damage, the hole should generally be 1/4" or less and the repair should include both a plug and an internal patch - typically by using the combo plug/patch posted earlier in this thread.