could i cruise at 85 with 4.88's.....?

 

It all depends on your tire size, but assuming you have 35" plus that would be no problem. You might run slightly higher RPM's than stock. There are calculators out in the net that would tell you the exact numbers. With less than 35" tires, RPM's might be a little too high to justify at those speeds.

 

I have 35's and run 4.56, with your tires size I'd go with the 4.88's

 

With your 33's sure but around 3,000rpms.

So you are running about 2500rpms @ 80?

 

[QUOTE=04NickySP2]With your 33's sure but around 3,000rpms.

How about with 37's?