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Old 08-17-2009, 02:59 PM   #1
N/A_junkie
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Default 225/45 or 245/40??

i wish i had more time to search but i have to get ready for work

what research i did real quick...i found i could run into potential negative issues with handling with the 245's...

because the wheels are 17x7.5

the tires i'm looking at are the hankook r-s2. they will be a summer/fall tire...back to factories for the winter. they will be autocrossed.

any info and advice is greatly appreciated thanks all.
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Old 08-17-2009, 03:01 PM   #2
nhat
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225/45 i would not go any wider than that on a 7.5" wide wheel
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Old 08-17-2009, 03:25 PM   #3
N/A_junkie
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Originally Posted by nhat View Post
225/45 i would not go any wider than that on a 7.5" wide wheel
that's what i read basically. i believe the 245's would work...but i also read that there could be to much roll with the tire around turns (no pun intended...you know what i mean lol)

i wish i had 17x8

car is a 03 bugeye btw. sorry about that.
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Old 08-18-2009, 12:33 AM   #4
bcblues
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For autocross, I would recommend the widest tire possible. As far as rim width goes, you will have absolutely no problem with the 245s. The A stock guys are running 275r40s on the stock 8" rims (on STI). The guy mounting the tires will not be too happy, but they DO WORK. 245s on 7.5 is no problem. Go wide or go home.
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Old 08-18-2009, 04:45 AM   #5
N/A_junkie
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Originally Posted by bcblues View Post
For autocross, I would recommend the widest tire possible. As far as rim width goes, you will have absolutely no problem with the 245s. The A stock guys are running 275r40s on the stock 8" rims (on STI). The guy mounting the tires will not be too happy, but they DO WORK. 245s on 7.5 is no problem. Go wide or go home.
that's what i like to hear. i heard the sidewall of the hankook isn't SUPER stiff...so maybe they will be slightly less pissed lol.

275/40 on an 8 inch wide wheel is

if i go the 245/40 route...that will be close to the stock diameter correct?
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Old 08-18-2009, 05:32 AM   #6
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why RS-2s? Kumho XS and Dunlop Star Specs are only slightly more expensive and are FAR better tires for 140+ tread rating auto-x tires.

I've had 225/45-17, 235/40-17, and 245/40-17 on my wagon. 245's were by far the best in terms of everything.
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Old 08-18-2009, 05:11 PM   #7
N/A_junkie
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Originally Posted by dantastic View Post
why RS-2s? Kumho XS and Dunlop Star Specs are only slightly more expensive and are FAR better tires for 140+ tread rating auto-x tires.

I've had 225/45-17, 235/40-17, and 245/40-17 on my wagon. 245's were by far the best in terms of everything.
originally i was shopping for the star spec dunlops, and i am a big fan of kumho's (had a different set before)...but i ran across a stupid crazy deal for the R-S2's.

@tirerack:

Kumho XS: $140
Dunlop SS: $148
Hankook R-S2: closeout price $88 a pop

and that is the 245/40...the 225/45 is $81**

what width were your wheels with the 245's?

edit: **my mistake...the 225/45s are $79...because i just ordered a set woot woot.

Last edited by N/A_junkie; 08-18-2009 at 07:18 PM.
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Old 08-23-2009, 02:31 PM   #8
efaroh
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Quote:
Originally Posted by N/A_junkie View Post
i wish i had more time to search but i have to get ready for work

what research i did real quick...i found i could run into potential negative issues with handling with the 245's...

because the wheels are 17x7.5

the tires i'm looking at are the hankook r-s2. they will be a summer/fall tire...back to factories for the winter. they will be autocrossed.

any info and advice is greatly appreciated thanks all.

I have 17x7.5 TE37 and wondering if i can go with 245/40/17 tire as well. i know recommended tire size is 225/45, but the price difference between the two sizes are so negligible, and the benefits could potentially outweigh the negatives...

what would be some of the enhancements? more grip, braking, lateral G's?

what would be some of the downsides? added roll, fender work, uneven tire wear?

I'm particularly interested in the Hankook K110 the Ventus V12 EVO.
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Old 08-23-2009, 08:13 PM   #9
grippy monkey
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^ you aren't going to reap the benefits of running a 245 if it's on a 7.5"... just stick with a 225

You would actually probably see more negatives if anything. The tire will be pinched on and you will see less contact patch than if the tire is mounted on the correct wheel. You will have more sidewall flex and roll through turns. It also makes the tire harder to mount. I've ran a 255 on a 8" and I really don't recommend running overly chunky tires just for the sake of saying you run a wide tire. It works, but you aren't going to be any happier with it (or maybe a little less) than running the right sized tire.

You could run a 235 if you want a little more width.
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Old 08-24-2009, 03:14 AM   #10
efaroh
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Quote:
Originally Posted by grippy monkey View Post
^ you aren't going to reap the benefits of running a 245 if it's on a 7.5"... just stick with a 225

You would actually probably see more negatives if anything. The tire will be pinched on and you will see less contact patch than if the tire is mounted on the correct wheel. You will have more sidewall flex and roll through turns. It also makes the tire harder to mount. I've ran a 255 on a 8" and I really don't recommend running overly chunky tires just for the sake of saying you run a wide tire. It works, but you aren't going to be any happier with it (or maybe a little less) than running the right sized tire.

You could run a 235 if you want a little more width.
Thanks for the input grippy... its nice to know the advice is coming from an experienced tire/wheel fitment guru. i'm going with 235/45/17. wider contact patch plus some added sidewall height for comfort. getting the best of both worlds is how i roll son!
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