Will the tire specification on size 55 affect my Tbirds driving mileage or performance?
The stock tire on the Thunderbird is P235/50R 17. Definition on size 55; ASPECT RATIO is the relationship between a tire’s section height and its section width. It is calculated by dividing the section height by the section width. When the section height is half of the section width, the aspect ration is 50. In a tire size description, it would be the 50 in P235/50R 17. It is also called the tire’s profile or the series. In other words, the Ford Thunderbird White Wall Tires are a little taller by about 5% greater than the width to accommodate the whitewall. The tire is a little less wide but would not effect it’s performance or mileage! The difference is minimal and hardly noticeable. Greg Hlinka, one of our customers, put the tires on his t-bird and had nothing but good things to say!
