Firestone was purchased by Bridgestone in 1988, and the two tires share a number of similarities as a result. There are claims that Firestone's grip is poor in comparison to Bridgestone's.
Both Firestone and Bridgestone share similar lifetime wear guarantees, typically ranging anywhere from 70,000 to 80,000 miles. These tires come in a variety of models that include H-rated, V-Rated and W-rated tires. Of these, the W-rated tire series receives the lowest lifetime wear at 50,000 miles. In addition, both share a 30-day guarantee, during which time a customer can try out the tires. Any defects found during this time are entirely covered by the company through a refund.
Under testing, both brand of tires performed well while cornering, although the Bridgestone tires performed slightly worse on wet road conditions. Both brands of tires are designed to be suitable for a number of different car types, including mid-sized sedans, luxury vehicles and SUVs. Firestone outperforms Bridgestone in fuel economy and provides slightly longer drives for the same amount of gas when using comparable vehicles. Overall, Bridgestone does seem to outlast the Firestone brand and has a slightly longer lifetime guarantee on average. However, the differences between the two tires are minimal.