I just purchased Tein H Lowering Springs for my 2008 Lexus ISF. It will bring the front down 1.0 inch and the back down 0.6 inch. I just remembered I put larger tires on the oem rims. I have 245/35/19 tires in the front and 285/30/19 tires in the rear. Will I have ANY issues lowering the car with these tires? Thanks
Used a tire calculator:
http://www.miata.net/garage/tirecalc.html
Tire Size Comparison
Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
225/40-19 3.5in 13.0in 26.1in 82.0in 773 0.0%
245/35-19 3.4in 12.9in 25.8in 80.9in 783 -1.3%
Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
255/35-19 3.5in 13.0in 26.0in 81.8in 775 0.0%
285/30-19 3.4in 12.9in 25.7in 80.8in 784 -1.1%
Your new tires size is actually .3in shorter than stock. So in actuality the overall drop should be the spring drop in inches + the shorter tire difference in inches: 1.3" front, .9" rear. The new width of the tire, +20mm front and +30mm rear, you're going to have to measure across to see if rubbing will occur at the overall drop height. Someone correct me if I'm seeing this wrong.