I bought my car in March and have about 5,600 miles on the odo. While prepping for a track day this weekend, I measured my tread depth on my stock sport 19" Bridgestone RE050As. The front tires have 7/32" of tread left and the rears about 5/32". Granted when I got the car, the rear tires may have spun at times
but I've never done any bigtime burnouts. I also did one track day earlier in the summer. At this rate, I'll have to get new rubber some time next summer (winter tires will keep these in the garage for about 5 months).
What kind of tread life/mileage have you guys gotten from these tires? Mileage and tread depth measurements would be helpful.
As an easy measuring tool, get a penny and a quarter. If you can cover the top of Lincoln's head on the penny, you have at least 2/32" left (legal minimum). If you can cover Washington's head on the quarter you have at least 4/32" left. Finally, if you can cover the top of the memorial on the back of the penny, you have at least 6/32" left. As a reference, these tires when new had 10/32" of tread depth.