View Full Version : 245/45-17 fitment

08-15-2002, 04:41 PM
does anyone know if that size tire will clear the bottom of the spring seat on an S13 with the OEM strut body? this would be on a 17x8" wheel with a +29 offset. i'm thinking the tire combo might be too tall. how about 235/45? does anyone have that? i have 215/45 right now and it fits fine...not much to spare though.

and yes, i will measure it myself if no one has the answer...just thought i'd ask. http://forums.freshalloy.com/ubbthreads/images/icons/wink.gif


08-15-2002, 05:22 PM
I am currently running 245/45-17 Nitto NT555R drag radials on 8 inch rims out back. It fits absolutely perfect.

08-15-2002, 05:29 PM
d'oh. i thought by saying strut body, everyone would understand that i meant FRONT. sorry. i knew it would fit out back...up front is what i'm concerned about. thanks though!



08-15-2002, 05:35 PM
Oh.... I REALLY don't think those will fit up front without spacers or a wide ass offset.

08-15-2002, 05:50 PM
I have them on the back as well. the 215 are a better choice for the front.

08-15-2002, 05:53 PM
yeah, it was a gearing thing. 245/45 with 3.92:1 J30 diff and the SR 5th gear will be just like the stock KA gearing. just wanted to ask around. i'll just be going with sticky 225/45-17 Azenis all around.

thanks guys!


08-15-2002, 08:02 PM
Ok, I'm running 16X8's with +35 offset, with Toyo FZ4's 225/50/16's, according the Les schwab my overall tire diameter is 24.8 inches. I'm probably around 1/4" from the spring perch, and about the same from the side of the strut, can't get much closer. Hope this helps.

08-15-2002, 08:34 PM
I am running 99 Mustang GT wheels (+24 offset) with the same tires. the backs are perfecto. the fronts... they rub a hair.

08-16-2002, 01:44 AM
I thought SR and KA trannys had the same ratios?

08-16-2002, 03:05 AM
Stock KA and SR are the same, Eric has an Infiniti J30 rear diff with a slightly lower gear ratio.


08-16-2002, 08:51 AM
Actually, all the ratios are the same except 5th. in the KA, it's .759 and in the SR it's .838. This makes for good passing on the highway, but it also means that 85 is 4000 rpm.

And I don't have the J30 diff...yet. That's the plan though. http://forums.freshalloy.com/ubbthreads/images/icons/smile.gif


08-16-2002, 09:39 AM
hahaha try the SR with a 4.36 final gear on it http://forums.freshalloy.com/ubbthreads/images/icons/smile.gif

08-16-2002, 09:47 AM
dude, that sucks. that means that at 7500 rpm with 225/45-17s, these would be your max speeds:

1st - 38.48
2nd - 67.19
3rd - 97.70
4th - 127.80
5th - 152.50 (but that would be tough to get to)

with the 3.92 gears and the same tires, i'll be able to hit these speeds at 7500 rpm:

1st - 42.80
2nd - 74.73
3rd - 108.67
4th - 142.14
5th - 169.62 (even tougher to get to)

I like that spread much better as it keeps me in 1st and 2nd for a while longer...more boost. But that's just me.


08-16-2002, 10:21 AM
which calculator are you using? im on stock rims for now 225/50/16s for now. the gear makes up for any kind of lag. when really hammering it out of the hole first is about as useful as lights in a blind mans house http://forums.freshalloy.com/ubbthreads/images/icons/grin.gif

08-16-2002, 10:25 AM
true, true. i don't get much out of 1st either. it goes by really fast. i can only imagine how it would be with MORE boost. http://forums.freshalloy.com/ubbthreads/images/icons/cool.gif

the calculator i've been using is addictive as hell:

Gear Speed Calculator (http://www.sgmotorsports.com/mph.htm)


08-16-2002, 10:39 AM
oh and the lightend flywheel doesnt help http://forums.freshalloy.com/ubbthreads/images/icons/wink.gif cool thanks for the calulater link http://forums.freshalloy.com/ubbthreads/images/icons/smile.gif