This for drag racing only not for daily driving...

I have 15 x10 wheels with 5.5 backspacing.

Will a 325/50/15 which equals to a 28 X 13.50R15 fit?

I don't mind if I have to roll the fenders

 

10" wheel with +12.7mm offset

That wheel alone will stick out 4mm more then a 10.5" +22mm wheel...

so I don think so unless you roll and pull the fenders quite a bit...

 

are you kidding me? I am about to loose it. I was told I need to get a 5.5 backspacing anything more would rubb the teins, so I get that and now that is not supposed to fit?

I HATE TIRES AND WHEELS!


Jason, could you maybe PLEASE post a sticky that once and for all states what will and will not fit on a Z, Calculators don't help unless you know the dimensions of the car and what will fit

I now know why high powered Z's have traction problems....because no decent racing tire will fit on the damn car

 

I think it was another thread of yours that I explained how backspacing / offset is figured...


You would need that 10" wheel with something more like a 6.5" back spacing... that would be like a +37mm offset...

there is alot of room in the wheel well that can be used....

i dont really know your set up... but if you want better traction drag racing... go with a 9" wheel (will be lighter) get a sticky 295ish size tire, and put 0 camber...

 

From your other thread...


4.5" back spacing is the same as +12.7mm Offset...

15x8 +12.7mm


Take width of wheel (8). Subtract the amount of back spacing (4.5) and you get 3.5. Divide the width of the wheel in half (8/2 = 4). 4 - 3.5 = .5" offset



8 - 4.5

4 - 3.5

5 / 25.4 = 12.7




Metric conversion...

25.4mm = 1"

.5" = 12.7mm

 

10" wheel w/ 6.0" Backspacing = 10" +25mm
10" Wheel w/ 4.0" Backspacing = 10" -25mm
10" Wheel w/ 5.0" Backspacing = 10" +-0mm
10" Wheel w/ 5.5" Backspacing = 10" +12mm
10" Wheel w/ 4.5" Backspacing = 10" -12mm
10" Wheel w/ 6.5" Backspacing = 10" +37mm

etc etc

 

none of this helps when I don't know what fits the car.

I was specifially told that a 6.5 backspacing will not fit that's why I special ordered the one with 5.5

also they do not make 15.9 it's 15x8 or 15x10

the only 295 DR MT makes is 30" tall which is why I wanted the 325/50. The only other option is a 275/60 which is not wide enough.

I'm starting to feel I have to go back to running slicks

 

I dont know what they offer in the wheels you are looking at, ...

10" wheel with 6.5" backspacing is the same as 10" +37mm

I had 10.5" +30mm on my Z and had pleanty of room on the inner wheel well with 295/35/18... 10" w/ 6.5" Backspacing will be 1mm less clearance then my 10.5" +30mm and leave an extra 13mm clearance to the fender...

Do they have a 6.25" back space? that would be Perfect with a 10" and that size wheel.. as far as the tire, it will be running it close without rolling the fender especially if running 0 or close to 0 camber

 

all the backspacing has to be custom made. so what I need to do is ask them (centerline) if I can send the wheels back and have them change the backspacing to 6.25

and then the 325/50/15 would fit? I currently am running -1.2 camber (since I still want decent street handling)
I don't mind if I have to roll the fender

can you confirm please

 

Just out of curiousity. Why is a 275mm tire not wide enough?

 

325/50/15 is gonna be one tall tire...

are there other options? if you are running the -1.2 camber, are you lowered at all?

 

I don't know how much power you're putting to the ground...Could you let us know and also tell us exactly which model MT you are looking at?

http://www.mickeythompsontires.com/strip.php

ET Drag Radial?
ET Drag Sport Compact?
ET Street?
ET Street Radial?

As was previously recommended to me: First, stay at the stock tire height (27"). Second, find a tire whose width is appropriate for your power level.

 

the only lower option would be the 275/50/15 wich is the one I used to run.
and they don't hook enough.

I have the tein Flex but have them as close to stock height as possible

 

The car will put out around 630whp

ET Street Radial

 

I was running 275/50 DR's when I was putting down 435whp and they hooked just ok.
Now I'm putting down 200 more whp and I don't want to run slicks anymore 1) because I hate the ice skating feeling and 2) they don't allow me to run slicks in the street class at IDRC

 

what PSI did you usually run?

maybe look at softer springs in the rear...

going to a fatter tire is not going to do much with the negitive camber you have... under acceleration load its going to be even more negitive...

that is a big height difference in tires as well.... its like 3" diameter difference... the smaller the diameter, the lower weight / less rotational mass... better overall acceleration...

 

I have the 9 kg tein's in the back compared to the 12 kg that come with the kit. It's still a ttad stiff but much better than the 12's

If I have to go to 0 camber I will. Just a bit worried about daily driveability

it's too bad that tires go from 26 to 28 a 26 with a 295 width would be perfect but no one makes those for 15" wheels

psi is about 14 on the et street radials

 

If I go with the 275/60/15 (28x11.5) on a 8" wheel with 5.5 backspacing will that work?

 

I can't catch a break here...

I called centerline and they do not take the wheels back because they are custom but they can change the back spacing. They only do 1/2 " increments though...will a 6.5 fit or do I need to go with a 6"?

I could also have them change the 15x10 into 15x8 but that would cost me $180 per wheel, so I figured screw it I try and sell these and just go back to Welds but guess what....they are on back order for the next 1 1/2 months.

so my only option is to change the ones I got to 15X8 from 15x10 or to change the back spacing to 6.0 or 6.5 and keep them as 15x10

of course only the 325/50/15 will fit the 10 if I go with either the 275/60/15 or 275/50/15 I need the 8"

I am soooo frustrated about this.

Someone please advise