|Originally posted by Spoon:|
MICHELIN® - PILOT SPORT A/S 3 PLUS ZP (RUN FLAT)...
Many say use "Run Flat" tires.... sounds nice on paper but have issues...1.
Require Tire Pressure Monitoring Systems (TPMS) because you can't tell running low pressure or flat.
Others w/ normal tires have TPMS as a option. Don't think USDOT/NHSTA requires them or updated FMVSS for future cars.
You can install this on any "old" vehicle but added cost on top of premium price of tires.
Note: TPMS on new vehicles often isn't = sensors in the wheels. They use Tone Rings for ABS to watch tire speeds for low/flat tires. Low tire changes tire radius and tire spins a little slower or faster and Tone Rings will "read" this data even w/o you using the brakes.2.
Point 1. is because "Run Flat" tires have Speed and Distance Limits running flat. If you fail to follow those limits, they can fail same way as "normal" tires do.
I don't think BMW etc w/ them from the factory does anything but trip the dash warning light to make you slow down.3.
Every flat I have in 10+ years is family hitting big things like curbs and Destroying a tire. Run Flat won't help here and very expensive to replace. If you have TPMS wheel mount sensors then very likely have to replace a sensor at same time because rolling a flat tire just a few yards often crushes them if the impact doesn't wreck them.
ETA--> Plus "Run Flat" tires have most to all repair rules that others have in https://www.fiero.nl/forum/Forum1/HTML/099748.html
When tire fails the repair rules, you have to junk a expense tire and your tire is often not in stock at many shops.
------------------Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)The Ogre's Fiero Cave
[This message has been edited by theogre (edited 05-07-2021).]