Hg

I'm stuck between the sizes of tire to get, but I'd really like to see the difference in how much side wall they have. I want it to kinda fill up the wheel well, but i don't want an excessively large tire wall. They will be going on a set of 16x8 IROC-Z '85-87 style wheels, either 245/50-16 Eagle GSC's or 255/50-16 Kumho Ecsta Supra 712's. I plan on lowering it about an inch later with the eibach pro-kit. Can anyone help me out? Thanks.

Thundering Z03

I don't have any pics of the two different sizes, but I can tell you that the second number signifies the tire wall height. Just as long as it's a 50 aspect, the wall size should be for the most part the same. 255's are just suppose to be wider than 245's, but then again, that's gonna depend on the make of the tire. Different companies vary. I'd pick the design tire that I liked, and look at the two sizes side by side in person, and make my decision by that.

Hg

Yeah, I understand what the numvbers represent, the 50 means it's a 50% aspect ratio of the width to get the size of the sidewall(or something along those lines) so that with wider tires, I'll end up with a bigger tire wall.

lasersi

I have 245's on the front and 255's on the back. They barely look diferent, however I had 255's on the front for a short time and it looked a little funny. I might be able to have pictures for you on Sat.

taturbo

You're close enough to OKC, there should be a tire store in that area that has both sizes in stock so you can see the difference.
The height difference is 0.4 inches.
A 245/50 is 25.7 overall diameter vs. the 255/50 @ 26.1
That info is straight out of the Bridgestone Price/Data book.
width goes from 10.0 to 10.5 overall width
tread width 9.1 to 9.4
Hope this helps a bit.

I've run 255/50's on the rear of my 89 Iroc and didn't like the taller sidewall, although not too much on paper it is noticible on the car. Traction wasn't worth the change in my opinion. Better quality tires make the biggest difference.
I have GS-C's on my 89 now, and their great tires, but I have Eagle F1GS on my 82Z w/16" GTA lace wheels and they grip even better and ride much better
Happy hunting.
P.S. Call Executive Tire in OKC, bought some Bridgestone Potenza RE940's from him over E-Bay @ very good price. Might be an option for you since you're local. Talk to Kirt.
Also, Is KATT still rockin OKC? I haven't been able to get them on the web in months!?

jawzforlife1

If you want to compare tire sizes go to http://www.eunos.com/tirecalc/ . It will show you the sizes then write a description about each tire's size. It will also tell you how you speedometer will be effected

deadbird

The visual difference in sidewall height isn't really noticeable.

*edit... my math was horriably off from what I had posted originally... ... but, the sidewall height difference equates to 5mph slow w/255/50's@60mph (tested in front of one of those speed survey things)

*edit edit.. ok maybe(big maybe) I was right... (my math sux bad) but, does this seem right.. 255(mm)-50%(sidewall ratio)/10(to get cm)/2.4(to convert to inches)=5.3125"(sidewall height) ? (245/50=5.104" sidewall height)

I have the 2 diff sizes.. they're crappy but at least I can show you....

jawzforlife1

like i said before, if you are bad at math go to http://www.eunos.com/tirecalc/ and you dont have to do any math, It does it all for you.

deadbird

gotta exercise the grey matter evry once in awile ya know

Alan84TA

I would not go over 245 with stock rims. I thought, what the heck they will fit, and got 265's... kills your handling... your sidewalls give and your rear wobbles back and forth... I also thought they would hook better at the strip... nope... same 60' times as with my 235's.... If you want to hook get drag radials....

Hg

OH HELL YEAH! The guy that owns that KATT's daughter goes to my skool too, she's mighty fine too

vortech305

This is my 245/50ZR16

silentneko

hey vortech, whats with all the rust, is it just the way the piture was taken?

redbird_400

Hehe I thought the same thing. Hey but I can point any fingers I have a small hole in my cat. I put some exhaust krank or what ever on it and now it sounds not bad but odd.

vortech305

I have 2 words "New york" the car itself has 145,000 miles on it, later on i plan on powder coating and undercoating the whole unibody.

Sauron91

I like your wheels..
I wish I could find some black T/A wheels ;>