rallyracer

It says this size tire is for a 8in wheel and ours is only 7...So for those of you with the 235/40 18" Tires have you had any problems?


215/45R18 vs 235/40R18 using http://www.1010tires.com/TireSizeCal...?action=submit


Tire - 235/40R18
Rim Diameter: 18 in 457.2 mm
Rim Width Range: 8 - 9.5 in
Speedometer Difference: 0.825% too fast
Diameter Difference: 0.82%

rallyracer

bump

Please help, I dont wana buy a tire that gonna fall off my wheel

mscobaltss

well i have 245x35x18 and my wheels havent came off yet lol ur fine with that size

quadracer0387

dont do it... it will ride shitty, and will buldge in the middle... go with 225/45/18
plus the hight difference will mess with you anti lock brakes... not good

BlackSS/SC

Go with the 235/40R18s! They work fine on stock wheel, mine are not wearing bad in the center and do not bludge. I've had them on for 20 000kms so far and it's all good.

rallyracer

Why do you say it will ride shitty?

Why is the 225/45 better?

quadracer0387

well if there isnt any bulge you would be fine, but if it crowns some, not all the tread will have full contact on the street

225s are closer to the stock hight

rallyracer

If that is ture then why does http://www.1010tires.com/TireSizeCalculator.asp say different?


235/40R18 = Diameter Difference: 0.82%
225/45R18 = Diameter Difference: 1.39%

BlackSS/SC

235/40R18 is fine, won't F the ride up or anything. I'm in the tire industry and this is an acceptable size.

Edubs

Doesn't it really depend on the specific tire? Don't some tires sit differently than others?

quadracer0387

tires vary in size, some brands are different than others

as long as you dont go +/- 3% of original stock size you should be fine

BlackSS/SC

^^^What he said^^^ They should all be pretty damn close as long as they are the same size.

Hopeless Regret

I have 235 40 18 on mine and have no issues you have nothing to worry about

rallyracer

Thanks for all the comment.

tim0shel

Thanks everyone because im about to use the same size for mine. I been looking at the falken 912's

syP

i roll 235/40/18... Not on a stock rim tho...


rides great!

JRelly

225s FTW

syP

not sure why you would wanna do that though.. it will bow inwards and look super cheap.. plus not protect the rim

JRelly

edited my post becuase I didnt read what he was wanting to do but actually a 215 fits nicely look at 06_SS_S/C's car

https://www.cobaltss.net/forums/showthread.php?t=92318

Jackalope

I run 245/40 18's all around and hve ZERO problems. Their over all diameter is very close to the stockers and no it doesn't hurt the ABS at all. For it to screw with the ABS you'd need to run 2 very different tires height wise from front to rear.

That calculater is a little off depending on the manufacturer of the tires. When you compair the bigger size tire go off what the manufacturer of the tire says it is. When I compaired my 245's they came out to be not quite .5 mph off but this link says its off by way more.

tim0shel

Well i ordered my tires dont know when they will be here but when they do and i get them on i will give an update.

what i got... Link below

http://highperformancetire.com/produ...age=1&featured

Kibosh3

theres no rubbing issues with the 245s? or even the 235s? ....and im also looking at the falken 912s

Jackalope

245's hit if your dropped on sportlines, load your trunk all the way up and pack 4 people in the car. Then the rears hit a little when you hit bumps hard.

saunders1986

iTrader: (1)

i'm running 225/45/18's on my 18x8 wheels. i think my next tire size will be 245/35/18

EceSSiveMod

no 225/40/18