Ok i know the stock tires are 215/45/18... Im ordering these goodyears but what size is best. I want 225/?/18. Someone help me fill in the middle numer. Should i get 45 or 40. What the defference. ANy problems with 45?

 

40- smaller sidewall

 

I have the 225/40/18's and they are smaller than stock.

40's = 2.117% too fast
45's = 1.398% too slow

I went with the 40's to solve the rubbing issue i had with the intake and sportlines. Honestly the best fit would be 235/40/18 = 0.825% too fast but than there might be rubbing issues on stock rim.

Last thing is I dont think these tires come in 225/45/18 i havent seen them but its possible.

 

pretty sure you can get 225/45/18 I personally have the 235/40/18's on my car.....they work great with no issues at all.

 

i have 225/45/18's on mine, but they are not this particular tire.

 

Whats the better brand? Firelli, Goodyear or bridgestone/firestone?

 

do you want pure performance or long life

 

i've heard good about bfgoodrich. i just got some g-force sports on my cobalt..and they rock

 

what would be the best for:

Performance?

Long Life?

Traction?

 

How bout Continental's? The Continental ContiExtremeContact (Ultra High Performance All-Season) come factory on many cars here in Germany and the shop I took the balt to for winter shoes said these would last for a good 40 to 50K if maintained properly.

 

gotta love BFG KDW-2s....mmmmmmmhhhhmmmmmmm....

Id go with 225/45/18s. Little bit taller sidewall than stock.

 

i have checked a few places show my where i can get these tires in that size cuz i wanna put them on the back.

 

only on the back? mismatching tires is not a good decision

 

ya, i have read about mismatching, but i did it all summer and took some nasty turns and it turned out fine. Thats was with balds stockers on the back if you can believe it. The reason I want a lil bit bigger tire in the back is to fill out the wheel well a lil more. Its done with many cars, using diff sizes for the front and back. Even when the car comes stock with diff tires, people upgrade rims and tires/sizes all the time....im not to worried.

 

best size would be 225/40/18 or the 215/45/18 otherwise your speedo will be off

 

I like the looks of those.

 

I have the 235/40/18 eagle F1, i love them, probably will buy another set when these wear out!! NO rubbing issues at all!!! the second number in a tire size is called and aspect ratio. It tells you the height of the sidewall in relation to the tread width. I.E. a 250/50/X tire will have a 125 mm sidewall the aspect ratio is %50. so a 300/50/X tire will have a 150 mm sidewall. So even though the tires have the same aspect ratio, 50, the wider tire will have a taller sidewall. So with the sizes you are considering 215, 225, 235 you are only looking at a difference of a few mm in sidewall height. my speedo is not off any either!!

 

you lowered? if so what springs?

 

lowered with sportlines

 

^^^^hmmmm same here might have to try the 235's after the 225's are bald

 

yea definetly give them a try. i thikn they fit the stock wheesl better than the stock tires. not to mention the look a hella lot better. they fill the rear out some and meet up perfect with the edge of the fender well

 

05orangeSS (chris) has the falken azenis i forget which ones though

 

I have the F1's right now.....will probably get the azenis rt615's after this though.....

 

ahhh.. why did i think u had the azenis.. hmm.. oh well... this sucks but i need to get new tires as well and i'm afraid because i don't want my axels to break when we go to the track chris so i'm looking into replacing the stockers