what is the width of front & back? what is the largest tires that are safe on them??

thanks ahead !!!

 

7.5 front and 8 rear.

 

I also would like to know, can anyone help what the correct size tires I should put on I need an A/S tire and plan to go with the Michelins, but i want to go bigger. I saw the pilot sport A/S in person on a Z in 17, he was running the stock 225/50/17 and 235/50/17. I want to go with a 45 series tire the 50s looked like truck tires way to beefy. Can I do a 235/45/17 and 255/45/17 on the stock 17s? What do you guys recommend as the best tire size for this application? thanks

 

http://www.1010tires.com/TireSizeCal...?action=submit

use that, looks like it may work but it will slow your speedometer down a bit. plus the difference in rotational mass is the front is greater than the rear.

 

I wanted to step down to 45 series tires as well, keeping the stock 17's....Based on the chart, your best bet is to use 245/45/17 in the front, and 255/45/17 in the rear. The differences between the "modified" sizes and stock sizes are negligable IMHO.

Front:
225/50: Overall Diameter: 25.85 in 656.59 mm
245/45: Overall Diameter: 25.68 in 652.27 mm

225/50: Sidewall Height: 4.42 in 112.26 mm
245/45: Sidewall Height: 4.34 in 110.23 mm

225/50: Radius: 12.92 in 328.16 mm
245/45: Radius: 12.84 in 326.13 mm

225/50: Circumference: 81.21 in 2062.7 mm
245/45: Circumference: 80.67 in 2049.0 mm

225/50: Speedometer1: 60 mph 100 km/h
245/45: Speedometer2: 60.3 mph 100. km/h


REAR:
235/50: Overall Diameter: 26.25 in 666.75 mm
255/45: Overall Diameter: 26.03 in 661.16 mm

235/50: Sidewall Height: 4.62 in 117.34 mm
255/45: Sidewall Height: 4.51 in 114.55 mm

235/50: Radius: 13.12 in 333.24 mm
255/45: Radius: 13.01 in 330.45 mm

235/50: Circumference: 82.46 in 2094.4 mm
255/45: Circumference: 81.77 in 2076.9 mm

235/50: Speedometer1: 60 mph 100 km/h
255/45: Speedometer2: 60.5 mph 100. km/h

Enjoy I think Ive made my decision.