Yeah that should work, you can always refer to the sticker on the driver side door sill. It will have OEM specs on their, I dont know what they are off the top of my head but as long as its close to that you can do it all day long.

 

OEM Specs are 225-40-19 F AND 245-40-19R

do you think i am close enough?
i am hoping vdc will not have problem and i guess speedo will be slightly off but not so much?

 

you'll be fine^^^

http://1010tires.com/TireSizeCalculator.asp

^^^use that site to caculate the differences in rolling diameter. It will tell you how much the speedo will be off as well.

 

should i check for front tires here? i mean where does the speedo calculates the speed from? front tires i guess?

 

^^^yes... how the calculator works is you must enter your OEM tire size first and then you can enter other sizes you're considering. Submit it and the site will find the specs for rolling diameter and will also tell you what % the size is off by and how that will affect your speedometer.

 

Since your from Canada I suggest you go here:

https://www.tiresavings.com/tireShop...season=Regular

I just ordered 2 SPTs and saved $100 so if you order 4 you will save at least $200!

Canadian pricing for tires is a ripoff.....

Especially when they don't adjust price for US exchange. $1 CAN is almost on par with $US, so these companies are making a killing on canadian clients. Bunch of F*ckers.

Shipped to me in Montreal in 4 days!





This what they say on their website:

Why is there such a large difference between the U.S. and Canadian price on the same item?
This is not a simple matter of currency exchange. All Canadian destined orders are shipped from our Vancouver based warehouse and sourced out, in most part, from Canadian distributors. Some items we sell in the U.S. are sourced out from our U.S. affiliates who ship them directly to our US customers. There is a difference, and quite often, very significant, between the dealer cost prices in US and Canada. Let us assure you that we work very hard to bring you the best prices possible, always.

at $100 more PER TIRE, I'm sure they are working "really" hard....

 

They do this as a safety buffer to promote understeer and prevent people from losing the rear end. With less grip available on those 2 tires the front end washes out (understeer) before the rear loses grip which is easy to correct (lift off) unlike an over steer situation where steering/throttle input and a experienced driver are required.

This is common practice amongst all companies that produce RWD cars. They are designed to understeer at the limit so grandma doesn't crash, the only cars that are neutral/oversteer off the dealership lot are pure sports cars/exotics and AP1 S2000's LOL.

 

As with my C6 Z06, from the factory I have 325's in the rear and 275's in the front.

 

Does anyone have empirical experience (i.e. track-time) with reducing push via tire size on the front? It makes sense, but I would worry a bit about turn in and steering effort.

 

honestly if your worried about rough ride, then get some 18's.

going with 245/35 you wont even notice the ride difference.

245/35
255/40
are the sizes you should go with.

 

thanks for the recommendation but i don't wanna go down to 18s
i though it would be much difference if it is not noticeable then i would try this setup. another question with this setup is does wider fronts makes the turns harder or something? i mean any over all disadvantages of this set up?
thanks

 

wider tires will have more traction to the ground, as for cornering it will be the same. Add some sways and cornering will improve much more.

 

tirerack.com for me, I shipped it close to the border and picked em' up on a trip down to the states....i'm now sorta regretting not getting 255's in the rear.

 

Where you actually able to find 235/40/19 F with the Kumho's
Did you purchase the set locally, because that size doesn't show as available.

 

I didnt but 235s i got 240s for front