I was having a tire vibration issue when turning corners. Couldn't figure it out until I realized that the set of BFG Radial T/As that were on the car were purchased in 1998 making them 16 years old and hard as rocks. They were 225/60R-15 and since I was going to replace all 4, I thought about going up to 235 or 245 and even thought about changing to redlines but decided I liked the look of the 225s and the white letters so I replaced them with the same.