any suggestion on how to stop the g coupe from cupping tires? sorry if this has been asked before.. if theres a thread for it.. please point the way..

 

Do you mean outer block heel toe feathering? Caused by the instability of tire blocks on directional tires which are not demounted flipped and rotated evry 90 days, 3-4,000 miles.

 

bein that my wheels are staggered.. i cant just flip and rotate my tires... i wanted to know if there wuz any way of fixin the problem tire cupping.. the inside of the tires that seem to wear rather quickly... any way a new suspension can fix this problem

 

^he's probably referring to flipping the tires side to side (change it to the other rim) so the inside is now on the outside.

Your solution lies in getting and keeping the car properly aligned with minimal front toe.

 

You chose directional tires.
You chose staggered sizes.
You must live with the results and pay the EXTRA COSTS associated with your choices.

Toe doesn't affect inside wear, that is primarily an excess negative camber problem.
Toe problems cause a different kind of side to side feathering vs heel to toe.

 

i chose to buy the car.. but i didnt know the problem before hand about it eatin up tires... i had only heard good things about the vehicle.. it came with the 19's... i bought the car used... so i didnt really choose the tires or the fitment

 

When you buy a used car you buy everything that comes with it!
Performance cars with directional tires have had heel toe feathering and camber wear since the tires came out in early 1990's.
My 1985 and 1990 300zx had directionals and the exact same problem as did my 1990 Q45 when I foolishly mounted directionals. My MB 1999 AMG C43 has the same problem now...................just a function of directional tires and failure to properly maintain them.

Git rid of Hankook chinese junk and install Michelin PS2 tires and watch the problem almost go away!

 

I can tell you for a fact that my G sedan, lowered on Z/coupe springs, exhibits front tire inside tread block heel/toe feathering on both my old 17" Avon M550 directional tires (recently replaced with asysmetical Falkens) and my current assymetric 18" P-Zero Nero summer tires. It doesn't matter if the tire is directional or not on these cars. I cross swapped my P-Zeros every 2K miles and I still get feathering, though it's not as extreme when I let them go 6K miles on the Avon. Regardless, the problem is still three. I had an alignment done in December and had the toe set to maximum toe-in of 0.08" per side, 0.16" total. This is an alignment setting Nissan started recommending for the Zs that were afflicted with this tire wear issue. My new 17" Falkens didn't seem to exhibit much feathering at all from December through late March. There was so little feathering that I didn't cross swap the tires all season. We'll see how my 18" P-Zeros handle the new toe setting.