But the front have more gap....was wondering about putting a 60 series on the front to reduce the gap. Is there a big differences visually if I put a 55 in the back and 60's in the front?

 

it depends on the tire.... some tires will have bigger looking sidewalls no matter what profile. i think it'll look a bit bulbous, but no ones gonan notice it when youre rolling.. and 55 series tires on a gs-r come stock.. so i think any 55 series tire will somewhat look the same on gs-r rims.

 

I really wouldn't go that big. The optimal sizes are 195/55/15 (stock size) and a lot of people run 205/50/15 (increase in width makes up for decrease in side wall % - so it ends up with a similar sidewall height to stock). 60% of 205 would put you at 123mm, while 55% of 195 is 107.25.

The tires you are considering would make your sidewall about 8mm thicker all around, which seems like a lot to me. If you are lowered, you run the risk of rubbing. Of course, if you have a more boxy tread, the difference may not be noticeable appearance wise, but I think that extra sidewall would make your car sit higher and look somewhat funny, and probably not handle very well.

Do you have 205/55 in the back? or 195/55?

 

205/55 tires look like balloons on stock wheels, and 205/60 would look even worse (dang my mom's Avalon has that size tires)

Stick w/ 195/55 or 205/50 all around.