ok my car has the Pirelli Pzero in 215/45/18

due to my employers policy i can get a set of our tires for free, provided i swap b4 500 miles

heres the dilemma:
the 2154518 size will not be available until Dec.

i can get 225/40/18s in either the Fuzion Zr1
or potenza 950s

However, based on expirience the Fuzions wear quick and tend to have a grittier handling profile

the 950s are what i had on my turbo escort in 205/40/17 and were the best tires ever in that size, but supplys are limited in the 18s and may be discontinued

Tough call when the Pirellis are pretty decent all around tires

what are you guys thoughts on the larger size
and i was trying to swindle a set of S03s in exange but those are 1400 dollars for all 4 so 720 my cost

 

I would definitely not take Fuzions over Pirellis. The Fuzions are not even in the same league. If you have to do a swap go for the Bridgestones.

I would just stick with the stock tires for now.

 

Just a thought, but could you look for a 225/45/18?

It's a slightly less unusual size, so you might find a few more in that size, and the overall diameter isn't so high that it'll affect speedo readings or dynamics at all really (in fact, 225/45 will give you less error than 225/40). Plus it'd get you the extra bit of width for traction, without sacrificing sidewall like you are with a 225/40.

Of the two you mentioned, I'd take the Potenzas. I've heard ppl say the Fuzions wear too quickly too.

 

update: we got both the fuzions and the 950s in stock in the 225/40/18, the look mean but i can just see the dealer throwing a fit about the diff size

also as of this after noon i rolled the odo to 500 even, which means.....i think i am gonna hang on to the pzeros and save some cash for some diff tires later(hopefully much later down the road)

the 500 mile mark also mean the clutch disc should be sufficiently seated to the flywheel and i can start goin a lil gentler on the takeoffs

motor is no where close to broke in yet tho...

 

Stick with the Italian rubber til it wears out..swapping to a different size will throw both your speedometer/odometer and ABS systems a curve....and since the sizes you mentioned arent an optional size for the SS your dealer wont be able reprogram your computer to compensate...this means any tire size related issues that arise will have the potential to not be covered by your warranty...this includes but is not limited to hub/bearing wear and ABS functionality

 

get some bfg g-force tires man.

 

agree. or look at the Pirelli PZero System Direzionale. just for your info... the car comes with Pirelli PZero Rosso Asimmetrico.

 

Yes in principle. I agree that if you stick a gigantic or really tiny tire on there, things will get out of whack. But the tire sizes we're talking about aren't very different at all.

215/45/18 has circumference of 2.044 meters.
225/40/18 is 2.002 meters, and
225/45/18 is 2.073 meters.

Overall, for either, you're talking about a 1-2% difference in rolling circumference. That's not enough to impact speedo/odo or chassis control systems. Hell, the speedo isn't accurate to 1% anyway, and for that matter, most people drive with even higher deviations just due to improper tire inflation.

Bottom line, just because it's not an option doesn't mean the tire won't work. Either of those above will work with virtually zero impact.

 

True
it is only 4.5mm lower profile on the 225/40/18
i measured the tw0

but i WORK for firestone and was offered FREE tires with my companies name on them, in fact the ADM that goes store to store was trying to tell me to put a bridgstone graphic on there

LOL i told him pay me more and we will talk...
but i missed my chance and will just make these last rotating and balancing them every few thousand plus i get tires dirt cheap all the friggin time

also my next point, does anyone else have an alignment problem...our machines as well as the dealership dont even have the specs yet....i called Hunter and they said im just gotta wait for prolly 4-5 months.