View Full Version : S14 17x8 +31 offset tire sizing

12-16-2002, 04:59 AM
hey guys

the wheels i wanted is 17x8 and is offered in +31 and +38 offset. i was thinking of getting the +31 offset for that flushed look, does this sound right? or is that too small? r32 gtr is +30 and it looks pretty good... Yeah i know it all depends on tire selection, so could you guys help me out? here are what i have in mind:

(i want to use the same size for all 4 wheels)

should i opt for staggered sizing? 225 front and 245 rear?

i'm leaning more towards 235/40 all-around because it won't have much clearance issues (even though i'm not planning to have coilovers). let me know guys, and if there's something foolish here, please scream at me before i go wasting my money on this set of rims.

thanks guys

12-16-2002, 01:05 PM
To keep the stock diameter, you want 200mm of sidewall with a 17" rim...

The close sizes are:

215/45 = 193mm - Would gear you down 3.5%, but too skinny...

225/45 = 202.5mm - Perfect, maybe a little skinny for 8" wheels IMO.

235/40 = 188mm - Geared down 6% - Like the 215/45, it's good for use with a J30 diff to put you back closer to the stock rear end ratio...

245/40 = 196mm - This is the size I'd use with 8" wheels - Front and rear!!!

Most say no wider than 245 on 8s...but some of the skinny 255s out there would work as well.

Later - Brian

12-16-2002, 01:07 PM
And get the +31 definitely!!!

Get +25 for 8s if it's available!!!


12-16-2002, 01:34 PM
What about a 235/45/17 tire size? Wouldn't that be closer to the stock diameter than the 235/40/17?

Tim '95 SE

12-16-2002, 02:56 PM
thanks orion, anyone else?


12-16-2002, 06:26 PM
Well doesnt he want a different offset for front and rear? I'm not really sure but i thought for best flushness staggered offsets are needed with many rwd cars?


12-16-2002, 06:40 PM
</font><blockquote><font class="small[/img]In reply to:</font><hr />
215/45 = 193mm - Would gear you down 3.5%, but too skinny...


So would 215/45/17 fit nicely on a 17x9 rim to you? HAHAHA no one says It can be done... ask Mike.. http://forums.freshalloy.com/ubbthreads/images/icons/grin.gif http://forums.freshalloy.com/ubbthreads/images/icons/grin.gif

12-16-2002, 10:32 PM
For the sake of being able to rotate tires, I would get the same size all the way around. Try to have them so that they fit flush with the front fender then in the back space them out to have them sit flush. I'm try to find some wheels 17x8-9 w/25-30 offsets. I'll most probably run the 8" wheels b/c I'm expecting a set of Apexi N1 type-v in about a month. I wanna make sure I'll be able to fit them with no problems if I do buy wheels before I recieve the coilovers.

12-16-2002, 10:33 PM
I don't mean too skinny for the 8" wheels - I meant too skinny when you can run 225s or greater for more grip - Not dR1fT !!!

And drift or not, it's a damn shame to run anything less than 245 on a 9" wheel...got the width, use it!


12-16-2002, 10:40 PM
I've got 245's for sale!!! buy them!!! RE010 JdM tYtE, Yo!

12-17-2002, 12:51 AM
You know they sell RE010 at Tire Rack, right?

http://www.tirerack.com/tires/tires.jsp?tireMake=Bridgestone&amp;tireModel=Potenza+R E010

Same as Potenza S-01


12-17-2002, 01:57 PM
Aaah. Cool. I want everyone to know that they are $199 a piece, so all of you who thought I was lying when I had these in classified can... well nevermind http://forums.freshalloy.com/ubbthreads/images/icons/tongue.gif

12-17-2002, 02:55 PM
</font><blockquote><font class="small[/img]In reply to:</font><hr />
To keep the stock diameter, you want 200mm of sidewall with a 17" rim...


Depends on what stock wheel/tire you had.

Stock S14 SE: 205/55R16 - 112.75 sidewall * 2 + 16in * 25.4in/mm = 631.9mm diameter

Stock non-SE: 195/60R15 - 117 sidewall * 2 + 15in * 25.4 = 615mm diameter

So, all of the stock S13's and BASE S14's (which, AFAIK, all came with 15" wheels) have more favorable gearing than the SE/LE S14's (16" wheels).

I run on my S14SE - 235x40x17 = 619.8mm diameter, and I wish it was smaller, actually.

The N/A guys would prolly find more revs per gear useful, while the turbo guys will prolly be happier with longer gearing.

As for strut tower clearance, my 17x8's are +38mm. They clear with the 235's on there, but not very well with 245's. With the Zeal coilovers, they don't clear at all. With the Zeal coilovers and 5mm spacers (effectively +33mm offset), they clear just fine with 235's, but not 245's.

I had to run the spacers anyway to get the SSRs to clear the 300Z TT brakes anyway, so no biggie.

As far as wheel sizes, I wouldn't run bigger than a 235 on a 8" rim. You CAN, but the optimal size is 235 on a 8". 255's should be run on a 9" rim.