i have a set of volk GTS 19x9.5 +17 and 19x10.5 +18. my setup is pretty agressive, i have a set of AP racing brakes 6pot front and 4 pot rear. My rims didnt clear my brakes so i had to get 10mm spacers. So with 275x35x19 on the rears, the tires almost scrape my fenders, even after they are rolled. I want to go wider but i dont want it to scrape.. but i think if i go with 285x30x19 it would be fine or even 295, or is that stretching the rubber to much. But as for the front what is the right tire sizee?? i am supercharged so i would like moree traction. I am also torn between the BFgoodrich KDW or the yokohama advan sports. I live in seattle and it rains ALOT, soo wet traction is really important. Any feedback is great guys.. thanks

 

Just grab a ruler with millimeter reading and see if you can afford to go wider. That 285 or 295 that you want is measured in mm so you can easily find out if it would be a problem or not. But if you say that your 275/35 is almost rubbing even with rolled fenders, then my guess is that you can't go any wider unless you pull the fenders.

 

285/30 or 295/30 is shorter than 275/35, so that will help make clearance. You are not stretching the rubber in those sizes with your 10.5" rear wheel.