Maximum TIRE(Rubber) fitment thread

[Ruben240]

Hmm.. so what about 18x9.5+12 up front (255/35) and 18x9.5 +30 (can be +20 too if +30 dont fit) on rear (255/35)? just 25mm overfenders on front.. Please guys I need something sure that fits :/
if that helps, coils are BC racing ER type and it's an S14.. ty

[jr_ss]

Originally Posted by spooled240

it seems somewhat difficult to run a 255/35 on a low offset 18x9.5 in the front of a s14, but I see many people run 17x10's and 17x9.5 with 255/40's in the front without an issue.

According to this calculator a 255/40r17 has the same width and overall height as a 255/35r18.
Tire Dimensions Made Simple - Discount Tire

I'm going to run a 18x9.5 +15 up front and a 18x9.5 +22 in the rear with 255/35r18 all around but I think I may have to use a 235/40 in the front for fender clearance..

I have 245's on a 18x9 up front currently and have no fender clearance issues. If you want decent meat in your fender wells, you need to have camber adjustment and not have the frame an inch off the ground.

Originally Posted by Ruben240

Hmm.. so what about 18x9.5+12 up front (255/35) and 18x9.5 +30 (can be +20 too if +30 dont fit) on rear (255/35)? just 25mm overfenders on front.. Please guys I need something sure that fits :/
if that helps, coils are BC racing ER type and it's an S14.. ty

They have calculators to see what changes when you increase sizes and change offsets. I'd suggest you do some more reading and utilize those calculators.

With that said, you should have plenty of room with overs.

[spooled240]

how much camber are you running? Camber does help, but at a certain point doesn't it seem senseless to run a 255 tire up front at -5* than say a 235 at -2.5*?

this is on stock metal fenders with just a roll btw

[InsTanCeZ]

IDK i think most serious racers (time attack, etc.) use around 4 degrees in the front and 1 or 2 degrees in the rear from what I've seen, but they're on DOT slicks like Advan A048s I think. Since you're on street tires, I'd go with 3 degrees in the front, and 1 or 2 in the rear, but that's just me. You may want less, but if you're going to be tracking a lot, go with -3 or -4.

[Kingbaby]

^^^

+1

less than -3 for the street unless your doing 100+mph corners on public roads everyday?

[[email protected]]

what PSi do you guys run on streched tires? do you guys go with what side wall recommends or...? I ask cause I was running a 285/30/18 on a 18x12.5(-6) and noticed i was at 20 psi so I went with what tire recommended(50) and now my tire ripped from the inside( I just had an alignment 2 weeks ago) did I fuck up or...?

[S14DB]

Originally Posted by Kingbaby

^^^

+1

less than -3 for the street unless your doing 100+mph corners on public roads everyday?

More like 0* Our suspension cambers like crazy under load.

[mad-ass]

Originally Posted by [email protected]

what PSi do you guys run on streched tires? do you guys go with what side wall recommends or...? I ask cause I was running a 285/30/18 on a 18x12.5(-6) and noticed i was at 20 psi so I went with what tire recommended(50) and now my tire ripped from the inside( I just had an alignment 2 weeks ago) did I fuck up or...?

this is a multiple question...

I run 36psi F/R on my car. That's just what I'm used to so that's what I got on all my cars.

when you got an alignment, they should have checked your tire pressure for sure. and it could have been anything that made the tire rip on the inside sidewall. talk to who ever you bought your tire from.

[[email protected]]

Originally Posted by mad-ass

this is a multiple question...

I run 36psi F/R on my car. That's just what I'm used to so that's what I got on all my cars.

when you got an alignment, they should have checked your tire pressure for sure. and it could have been anything that made the tire rip on the inside sidewall. talk to who ever you bought your tire from.

Ah ok thanx. Unfortunately I can't talk to the guy I got tire from. Bought rims with tires about 4 months ago. Just a pisser cause it was a KDW and it had plenty of life left..ah Fml ATM.

[e1_griego]

50 is the max pressure on the tire, I'm guessing.

Mid 30s to street drive should be just fine.

[mad-ass]

Originally Posted by [email protected]

Ah ok thanx. Unfortunately I can't talk to the guy I got tire from. Bought rims with tires about 4 months ago. Just a pisser cause it was a KDW and it had plenty of life left..ah Fml ATM.

Hmm...because you bought this second hand, can't really do much about the sidewall now, especially 4 month later.

anyway, can you check the manufacture date code on it? it should be 4 digits of numbers. first two state the week of the year, and second two are the last two digits of the year. so for example (2812) would indicate that it's made on the 28th week of 2012.

I'm just wondering why the tire has cracked, might be because it's old.

[jr_ss]

Originally Posted by [email protected]

what PSi do you guys run on streched tires? do you guys go with what side wall recommends or...? I ask cause I was running a 285/30/18 on a 18x12.5(-6) and noticed i was at 20 psi so I went with what tire recommended(50) and now my tire ripped from the inside( I just had an alignment 2 weeks ago) did I fuck up or...?

This isn't the stretched tire thread for one. You want to head to the stretched tires thread for more advice.

[Seraphim38]

this thread is sorely lacking OT maximum rubber, so here's pics from my weekend. These are going on this week:

235 Azenis front tires vs new rear 315/35/17 Nitto NT05



old 275/40/17 rear tires vs new 315/35/17 rears





more than a handful



set next to the car

[spooled240]

nice rubber, but let's see them on the car? lol

Originally Posted by [email protected]

what PSi do you guys run on streched tires? do you guys go with what side wall recommends or...? I ask cause I was running a 285/30/18 on a 18x12.5(-6) and noticed i was at 20 psi so I went with what tire recommended(50) and now my tire ripped from the inside( I just had an alignment 2 weeks ago) did I fuck up or...?

sidewall damage from the inside usually means the tire was driven on flat, which renders it unsafe to use. If the damage is minimal I wouldn't really worry about it but if it was extensive then I strongly recommend that you get it replaced.

oh and i've always had max psi in stretched tires. The rating on the sidewall is cold psi, so don't put max air pressure after you drive it because the tire heats up and the air inside of it expands.

[voiddweller]

YOUR CHASSIS: S14a

WHEELS: MB, Weapon, 17x8, +28, 73.1 bore, aluminum hub centric rings

TIRES: 225/45R-17, Bridgestone Potenza, RE-11

MISC DETAILS: KWv3 - dropped 1 - 1.5" - 300zx 26mm Front and OEM 300zx Rear Calipers, wheels very close to coil-overs (2mm) but tires were fine. No fitment rubbing as long as rings are used. Ran over a dozen laps at Mid-Ohio with no issues. No roll or pull.

PURPOSE OF CAR: street & track

PICTURES:

[ILoveJDM]

Originally Posted by S14DB

More like 0* Our suspension cambers like crazy under load.

0 in the front......?

[spooled240]

Back in 2009. 18x9 +25 with 255/35 all around. Rubbed like crazy at this height, although I don't think I ran any camber. :P

[InsTanCeZ]

Originally Posted by Seraphim38

235 Azenis front tires vs new rear 315/35/17 Nitto NT05

So you're running 235s in the front and 315s in the rear? Have fun under steering into a pole I guess?

Unless it's a drag only car I suppose.

[HighwaystarJC]

Originally Posted by HighwaystarJC

is there a zenki running 255/40/17 on 17x10+18 RPF1's? i've been looking for hours and cant find the post that says what is wrong with fitting the front. This is the setup i plan on running so i'm trying to research it as much as possible

can anyone chime in on this situation? is the difference the width of the coilovers?

im really hoping to discover the smallest amount of spacer I'll need to clear the coilovers with stock s14 fenders

[240sxScores]

If it's the setup you plan on running just buy it and do it already. This thread should give more than just a basic idea of what it takes and or looks like.

Sent from my HTC One

[Seraphim38]

Originally Posted by InsTanCeZ

So you're running 235s in the front and 315s in the rear? Have fun under steering into a pole I guess?

Unless it's a drag only car I suppose.

front is getting new 255/440/17 Nitto Nt05 because my mechanic, and reading here, led me to believe that 275s can't be fitted on the front.

Yes I have taken the car to three 1/8th mile drag racing events this season and it typically spins the tires for all but the last 20 feet of the 1/8th mile. I can post videos of it if interested.

I am doing this setup for max grip. Currently the front end will understeer into corners because the 235 Azenis are horrible and too small, and then if you get on the gas it will oversteer from not enough rubber in the back.

[Drift_FX]

Originally Posted by Seraphim38

front is getting new 255/440/17 Nitto Nt05 because my mechanic, and reading here, led me to believe that 275s can't be fitted on the front.

Yes I have taken the car to three 1/8th mile drag racing events this season and it typically spins the tires for all but the last 20 feet of the 1/8th mile. I can post videos of it if interested.

I am doing this setup for max grip. Currently the front end will understeer into corners because the 235 Azenis are horrible and too small, and then if you get on the gas it will oversteer from not enough rubber in the back.

im currently running 335 rears and 265 fronts on my auto-x setup, i dont really have understeer issues. how you setup your suspension makes all the differennce....

[jr_ss]

Originally Posted by Drift_FX

im currently running 335 rears and 265 fronts on my auto-x setup, i dont really have understeer issues. how you setup your suspension makes all the differennce....

Yes and no. There comes a point where you don't have enough mechanical grip up front with a large stagger offset.

[e1_griego]

PJ's running 315s all around now. Panda just went 1st and 2nd at SCCA solo nationals, so clearly he's doing more than a few things right.

[HighwaystarJC]

Well I've found a great example but he's on Tein Coils which I'm guessing use the thinner Coil diameter. Are you running any spacers on this setup JRas?

Originally Posted by JRas

my setup now 17x10 +18 RPF1's 255/40/17.

[jr_ss]

Originally Posted by HighwaystarJC

Well I've found a great example but he's on Tein Coils which I'm guessing use the thinner Coil diameter. Are you running any spacers on this setup JRas?

No and 255's on a 10" wide wheel is not considered max tire...

[Skepticism]

edit: wrong thread I think, posted my question in the actual fitment question thread.. lol.

TLDR was 17x9.5 +17 front doable for max rubber? or would I rather go for 17x8.5 +25 ? thx ^^

[InsTanCeZ]

Originally Posted by jr_ss

No and 255's on a 10" wide wheel is not considered max tire...

Well a 255 on a 10" rim will perform better than a 255 on a 9" or any other smaller rims, and it's not considered stretched so, what's wrong with that?

[mmmS13]

Originally Posted by InsTanCeZ

Well a 255 on a 10" rim will perform better than a 255 on a 9" or any other smaller rims, and it's not considered stretched so, what's wrong with that?

Whats wrong is that this is the max tire thread, not the performance tire thread.

[jr_ss]

Originally Posted by InsTanCeZ

Well a 255 on a 10" rim will perform better than a 255 on a 9" or any other smaller rims, and it's not considered stretched so, what's wrong with that?

How the hell is a 255 going to perform better on a rim it has to be stretched on to, to fit? A 255 is perfect for a 9" wheel, hell a 265 is better for a 9" wheel.

Originally Posted by mmmS13

Whats wrong is that this is the max tire thread, not the performance tire thread.

Exactly. By our standards and the rules laid out in this thread, a 255 is not max tire for a 10" wide wheel. Neither is a 255 on a 9.5" or anything that resembles the minimum tire section width allowable on a specified rim width.