Tire size recomendation for 17x8 and 17x9 wheels

Post by **preludervtec** » Thu Feb 28, 2008 2:57 pm

I am currently in the market for some new tires and am having trouble deciding on tire sizes. Will be running 5zigen fn01r's as my dedicated track wheels starting this season. Fronts will be 17x8 +35 and Rears 17x9 +20.

Fronts:225/45 or 235/40

Rears:245/45 or 255/40

Any Suggestions? I hear running too big of a staggard tire setup is not recommended.

Post by **nismofly** » Mon Mar 03, 2008 8:01 am

did you buy the wheels yet?

if not dont get those fronts because they sit too close to suspension and the most tire youll be able to run would be 215

get the 17x9 +20 front and rear and you can run like a 235 or 245 all around, or run one of those up front with 255 rear

btw if you get 245 get 245/40 not 245/45

Post by **preludervtec** » Mon Mar 03, 2008 8:35 am

thanks for the heads up nismofly!

I didn't realize that i would be running into that problem with the fronts. Luckily I haven't bought the front wheels yet and only have the rear 17x9 +20 wheels.

As for the 245's for the rear, the azenis are only offered in a 245/45. However, i'm still waiting on more reviews concerning some of the new tires coming out this season from Toyo, Bridgestone, and Kuhmo.

Post by **nismofly** » Mon Mar 03, 2008 8:39 am

im eagerly awaiting the kumho xs, if what they claim is true it should totally raise the bar for top end street tires

on the other hand if you want get hankook rs2 in 245/40 since you can probably find them

what kind of engine setup are you running?

Post by **preludervtec** » Mon Mar 03, 2008 11:32 am

Yeah waiting on the kumho xs but i heard that they wont be available until the end of this season or so.

I've been thinking about trying the new Dunlop Z1's. They've been getting really good reviews from some of the guys on the SCCA forums.

Why do you recommend the 245/40 instead of the 245/45? I've driven on both the rs2 and rt-615's and like the azenis much better.

As for my engine, its a basic SR swap in my s13 w/ all major bolts and a t28 at stock boost. Will be running an enthalpy tune and some 550's in the future so that i can turn up the boost.

Whats your setup like nismofly?

Post by **nismofly** » Mon Mar 03, 2008 4:31 pm

im just running stock ka right now im finishing a bunch of other stuff before i touch the engine, pretty much everything besides cage will be done

the reason i ask though is because 245/45 is quite tall and youd be really better off squeezing a 255/40 up front if youd like the falkens, but again that will require lower offset so youd be either spacing out fn's or in the market for something else, your best bet being to get 5 lug since a lot of 5 lug wheels are available in 17x9 +15 to +17, and that subtle difference goes a long way in fitting a 255 on the front of an s13, be prepared to do some fender massaging of course

Post by **crackler** » Mon Mar 03, 2008 5:09 pm

According to the top miata guys, the Bridstones are way better than the falkens, but if you are running 17's then the Neo advan's are the "IT" tire. At least they where last year. I'm still waiting as every one else on the new crop of tires coming out.

Post by **preludervtec** » Wed Mar 05, 2008 8:16 am

Are you referring to the re-01r's? if so, then yeah i've heard those are alot better than falkens.

I think i am going to look for another pair of 17x9 +20 fn01s for the fronts now and run a 245/45 or 245/40 setup all around.

Or if i come across a good deal on a different wheel with a lower offset in 17x8, i'll run those in the front instead w/ like a 235/40.

Post by **nismofly** » Wed Mar 05, 2008 3:35 pm

shoot for at least an 8 +15 to +20 to fit a 235, lower if possible of course

Post by **nismoautoxr** » Sun Mar 23, 2008 9:09 am

Im not sure what you guys are talking about with the S-13 as I have experience with the S-14.My S-14 has ground control custom front struts with no perch except for the sleeves and adjusters with a 2.5x5.5" in spring and its all I can do to get a 17x8.5 Enkei RPF1 wheel with a 40mm offset and a 245-40/17 victoracer on the front with a .125"spacer and 2.25 degrees neg camber without rub on the spring.

Are you guys running these bigger wheels and tires in front with no neg camber or are the S-13s just capable of more clearance to the strut/spring than the S-14?

No B.S. how can you do that?

Ricky-

Post by **nismofly** » Sun Mar 23, 2008 10:23 am

s14 actually has 8-10mm more clearance with coilovers, and you might have more because youre running gc's, not sure how they affect wheel clearance

your problem is your offset is too high, instead of the 17x8.5 +40 rpf1's you shouldve gotten the 17x9 +22, then you would have no clearance problems whatsoever running a 245 or 255, and you still probably wouldnt have to do any fender massaging

Post by **oz240red** » Tue Jul 29, 2008 10:22 am

Thanks Nismofly for that great info. I'm new to this forum, but that was exactly the question I needed answered!

Tire size recomendation for 17x8 and 17x9 wheels

Tire size recomendation for 17x8 and 17x9 wheels

Re: (nismofly)

Re: (nismofly)

Re: (nismofly)

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