The company says that the tire, when new, is 12 percent more likely to resist hydroplaning than its DriveGuard counterpart. These include Pirelli Scorpion Zero Run Flats, Goodyear Eagle Sport tires, Bridgestone DriveGuard and Michelin Pilot Sport all-seasons.īridgestone recently announced the DriveGuard Plus, billed as an improvement on its existing line of run flats. This type of run flat is usually found in heavier segments, like military or armored vehicles. Popular options in this category include the Bridgestone RFT, Goodyear EMT, Michelin ZP, Yokohama Run-Flat and Pirelli RFT.Īuxiliary-supported run flats contain a ring of rubber or a similar material on the interior of the tire, which picks up the slack of the deflated outer tire. The sidewall maintains its connection to the rim. This type of run flat features a reinforced sidewall construction, which has an increased chance of supporting the car in the event of air pressure loss. The most common choice is the self-supporting run flat. There are three main technologies used in run flat tires: self-supporting, auxiliary-supported and self-sealing. Run-flat tires sound like a boon for the tire industry.The Bridgestone DriveGuard Plus comes in most common sizes. In short, run-flat tires typically cost about 40% more and must be replaced perhaps 20% sooner than conventional tires. Also, many run-flat tires cannot be repaired and often need to be replaced in pairs." The standard tire equivalent costs about $174, a $65 difference per tire. A 205/55R16 run-flat tire at a local shop in Santa Monica, California, costs $239. "Run-flat tires are more expensive to replace. Power study found that "customers with vehicles equipped with run-flat tires are nearly twice as likely as those with vehicles equipped with standard tires to have to replace a tire due to a flat or blowout."
A side effect of the softer compound is a shorter tread life." Opinions differ on why this is, but one theory is that tiremakers put a soft tread compound on a run-flat tire to counter the hard ride. Power found that people were replacing their run-flat tires an average of 6,000 miles sooner than owners using standard tires.
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