i got new tires yesterday they are goodyear eagle F1 GS-D3. i got them in sizw 225-55zr16. a little larger than stock. i wanted to go a little less profile but he said they dont recoomend it something with the speedometer, but the car now turns and breaks amazingly well, but at highway speeed, takes a lot longer to react to steering wheel inputs, and it feels like the front turns, than the back turns it feels like weird, hard to explain. but do you think stiffer springs would fix this??

 

Do you have any other mods on the car? If not that would explain some of it. Most people will comment that the stock suspension sucks. The FSTB and RSB are necessary components IMO. Both my 2000 GXE and 2002 SE handled like crap before the mods. High speed cornering exhibited the exact same behavior you are describing (flick the wheel and the front responds slowly and the rear responds even slower - feels as though the car is rotating).

 

Give your tires time to break-in. Brand new ones still have the coating that prevents it from sticking to its mold.

Drive it around "gently" for several hundred miles and see if it improves.

On a sidenote, the F1's may also have a softer sidewall - so it might be flexing when you make those quick maneuvers.

 

1) Did you have the stock 215/55-16 size before? If so, you now have a slightly taller sidewall that will tend to be a bit softer laterally. (As well as possible differences in the construction of the tire as a previous poster noted.)

2) Did you check the pressures? Installer may not have inflated them correctly. Also you might like to try running 3~5 psi over the Nissan spec to see whether you prefer a little better responsiveness at the cost of some increased ride harshness. (but be sure the cold inflation pressure does not exceed the limit printed on the sidewall of the tire.)

3) Those are directional tires; check to make sure they were installed correctly. If not get it corrected ASAP. (Installers do get this wrong occasionally, it has happened to me.)

 

^^^ good call, ESPECIALLY on the pressures part. thats what id check first.

 

yes i had the stock size before, i put the pressure at about 49 psi as tires max pressure is 51psi, and they are directional and i made sure they are all on the right way. i will give time to breakl in and look into getting f and R strut bars.

 

I may be wrong in this case, but you should follow your vehicle's suggested tire pressure and not what's written on the tire.

This is to help compensate for the added pressure the tire receives when compressed from a bump or hit.

 

WoW I think that pressure is waaay too high! If you look under the center console lid between the front seats it tells you the proper tire pressure. For those of us who have the 16inch rims mine says 33psi in front and 30psi in rear.

Keep in mind you check the pressure in the morning BEFORE you drive it. Additionally, you went with a larger tire size and a different brand than the Bridgestones that came with the car, so I dont know if the 33FR 30Rear apply. But I'm sure 49 is freaking high.

Oh just to let you know I bought the Eagle F1's also and couldn't be happier! They put them on the new corvettes which helps them stick to the ground. They replaced the $80 wal mart brand tires a dealer put on them.