If im lowered on Prokits with a 2010 mazda 3 hatch. What is the maximum backspacing that is allowed for rim fitment. I am looking to put these on this summer.

http://www.tsw.com/alloy_wheels_nurburgring.php

I am looking to run them 19x8.5 and with 225x35x19 tires. hoping there is enough backspace to fit. I couldnt find to much info on people running this setup.

thanks in advance.