After a lot of thoughts, I finally did it ! I installed OEM 360 rims and tires on my 348. I love the wider track and more modern look of the rim design. I do have a question about the tires pressure. The old 348 OEM tires and rims called for 35 pounds for the front and 38 for the rears (cold) Any advice about this ones ? They are Bridgestone Potenza S02A 18 inc. 215/45 front and 275/40 rear. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
You really gotta burn some of that rubber off. Kind of embarrassing to have that much tread on a 348. Ya gotta replace the picture in a few weeks! By the way, the combo looks great. PS if you want to swap my rubber for yours, I'm game!
for some reason, the 360 wheels look fantastic and appropriate for the 348. On the other hand, they look very out of place on the 355. Why is that? Is it just me? JD
The tyre wall pressure is usually a maximum figure, completely inappropriate ! Tyre pressure of the same wheel and tyre on a different vehicle model can vary greatly.
Hmm interesting i run max pressure in all my cars all the time. From my work truck, to my H2 to my 300ZXTT.
Welcome to the club Roberto I love the 360 wheels on my spider and you will notice an improvement in handling. Image Unavailable, Please Login
My local tyre fitter put 5psi more in each of the rear tyres on my BMW By mistake and I could notice the difference driving and could see the difference in how the tyre sat on the road, mainly only touching in the central half band of the tyre. Ferraris are susceptible to handling and driving problems caused by slight variations in tyre pressures (+ or - 2 psi) so your advice of adding an extra 20psi is a little worrying.
Interesting look, I like it - how does the wheel/tire weight compare to stock 348? Are 360 brakes next? cheers
Looks good Roberto. Hehehe - I'm really starting to look forward to your posts now, Rod. All the best, Andrew.
Roberto, the 360 wheels look amazing. They look better than 355 wheels on the 348 - there, I said it!
Looks great! Did you have to use spacers to get the wheels to fit correctly? If so, what size spacers did you use and what size wheel bolts did you use.
They are lighter, the front tires have also the same wideness "215" so the steering wheel feel the same as the OEM 348 wheels.
There is no tire pressure data for what you are doing. The minimum starting point is 10psi/1000lbs. So about 32psi for a 3200lb car is a decent start. Then the goal is to have even treadwear. So align the car for the driving conditions including making sure the rideheight is facotry because your wheel tire could change that. Then I'd take a long drive on the freeway say 30 miles or 30 mins. Then whip out the tire pyrometer and test accross the tread for even temperature which would indicate even contact patch with the road. You would add and subtract air as need to get this even temperature. Then go take a legal spirited canyon run and test again. That should get you in the ballpark of what you need for tire pressures. This is much easier on a race track with race tires. The sidewall pressure should not be used. This number is for even treadwear at the maximum stated load for the tire. You never run at max load for the tire. If your car is lighter and you have this max pressure you tend to get center treadwear. Overinflated tires are hotter in the center Underinflated tires are hotter on both inner and outter edge too much negative camber tires hotter on the inner and colder on the outter too much positive camber hot outside cold inside too much toe in hotter on outside
