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  #1  
Old 08-13-2009, 02:55 PM
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twistedsymphony twistedsymphony is offline
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Default Wheel and Tire Info

S13/S14 Factory Wheel and Tire Sizes:
4 Lug Steelies: 15x6" +40mm w/ 195/60/R15
4 Lug Alloys: 15x6" +40mm w/205/60/R15
5 Lug Alloys: 16x6.5 +40mm w/205/55/R16

S13/S14 Factory Lug Specifications:
4 Lug: 4x114.3 (72-87 ftlb)
5 Lug: 5x114.3 (72-87 ftlb)
Thread Size: 12mmx1.25

Wheel/Tire Info and Calculators:
Basic Wheel and Lug Terminology and Metrics: https://www.rsracing.com/tech-wheel.html (thanks Andrew R!)
Wheel and Tire Size Calculator: http://www.rims-n-tires.com/rt_specs.jsp
Wheel and Tire Size Calculator: http://www.wheelsmaster.com/rt_specs.jsp (thanks Andrew R!)
Offset Calculator: http://www.1010tires.com/WheelOffsetCalculator.asp (thanks Andrew R!)

Wheel and Tires Weights:
Wheel Weight database: http://wheelweights.net/

Will X Wheel with Y Tire fit on my Car?
Wheel Fitment Database: http://rimtuck.com (thanks Paaaaat!)
Maximum S-Chassis Wheel/Tire Fitment (For Grip): http://zilvia.net/f/chat/166563-maxi...nt-thread.html
Maximum S-Chassis Wheel/Tire Fitment (Stretched): http://www.zilvia.net/f/chat/129865-...tch-flush.html

Parts Needed to do a 5-Lug Conversion:
Quote:
Originally Posted by twistedsymphony View Post
S13 Front:
  • S14 SE Front Hubs or S13 "conversion" Hubs
  • S14 Spindles*
  • S14 Ball Joints (pressed into the S13 LCA)*
  • S14 SE Front Rotors (or re-drilled 4 lug rotors)
  • 5-lug Wheels
*Not needed if using aftermarket "Conversion" Hubs

S14 Base Model Front:
  • S14 SE Front Hubs
  • S14 SE Front Rotors (or re-drilled4 lug rotors)
  • 5-lug Wheels

S13/S14 Rear:
  • S14 SE or Z32 (non-turbo) Rear Hubs
  • S14 SE Rear Rotors (or re-drilled 4 lug rotors)
  • 5-lug Wheels
Basics for "Aggressive" Fitment

Quote:
Originally Posted by Andrew R View Post
...Offset is a measure of how far the mounting face (surface that touches the brake rotor) is from the centerline of the wheel. When you want to run a wider wheel with the same backspacing, the inner edge of the wheel will come closer to your suspension, eventually hitting the frame, control arms, coilovers or bodywork. To avoid this, wider wheels are made with lower (more negative) offsets. The side effect of this is the wheels "poke" out more. This "poke" makes the car look better by getting rid of the wheel gap almost all stock vehicles have. We try to take this a step further by stretching tires and running offsets so low that the wheel lip actually extends beyond the bodywork, while the tire tucks into the body.

Sunken:
(stock Miata wheels)


Good fit = flush *this of course may be too aggressive for some


I took a tape measure to my stock wheels and measured the gap to the fender arch from the wheel lip then used the calculator above to determine what offset I wanted. Remember that you can
always get more negative spacing with spacers -but you wanna be close -however if they are too negative (sticking out too far) it will be difficult to get them back in -if not impossible. -typically would require machining and cannot be done on most wheels without a huge compromise in strength = unsafe. ...
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Last edited by twistedsymphony; 12-06-2010 at 01:29 PM.
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  #2  
Old 11-15-2009, 10:59 PM
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Paaaaat Paaaaat is offline
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Default Re: S13/S14 Wheel and Tire Info

http://rimtuck.com should be on this list as well!
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  #3  
Old 01-11-2010, 11:04 AM
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Floam90S13 Floam90S13 is offline
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Default Re: S13/S14 Wheel and Tire Info

I have a question, if the steelies and alloys are the same size, is the difference in tire size to save money with the steelies? If yes, does anyone know what acceptable tire sizes you can put on the alloys that aren't for trucks? I need to get a cheap set for my SE rims (4lug) for when I ship my car. I am looking for the cheapest tires/tire size possible just for the trip/whatever parking lot drift events i can make it to.
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  #4  
Old 10-15-2010, 01:14 AM
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Default Re: S13/S14 Wheel and Tire Info

is there a 5 lug swap parts list somewhere? i wanna do one on my coupe but i'll need a parts list
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  #5  
Old 10-15-2010, 07:54 AM
kevinphan kevinphan is offline
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Default Re: S13/S14 Wheel and Tire Info

Quote:
Originally Posted by zachxb View Post
is there a 5 lug swap parts list somewhere? i wanna do one on my coupe but i'll need a parts list
http://tinyurl.com/36hhv5q
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  #6  
Old 10-29-2010, 02:07 PM
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twistedsymphony twistedsymphony is offline
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Default Re: S13/S14 Wheel and Tire Info

Quote:
Originally Posted by zachxb View Post
is there a 5 lug swap parts list somewhere? i wanna do one on my coupe but i'll need a parts list
S13 Front:
  • S14 SE Front Hubs or S13 "conversion" Hubs
  • S14 Spindles*
  • S14 Ball Joints (pressed into the S13 LCA)*
  • S14 SE Front Rotors (or re-drilled 4 lug rotors)
  • 5-lug Wheels
*Not needed if using aftermarket "Conversion" Hubs

S14 Base Model Front:
  • S14 SE Front Hubs
  • S14 SE Front Rotors (or re-drilled4 lug rotors)
  • 5-lug Wheels

S13/S14 Rear:
  • S14 SE or Z32 (non-turbo) Rear Hubs
  • S14 SE Rear Rotors (or re-drilled 4 lug rotors)
  • 5-lug Wheels
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Last edited by twistedsymphony; 10-29-2010 at 02:13 PM.
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  #7  
Old 10-30-2010, 12:00 AM
96NismoZ 96NismoZ is offline
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Default Re: S13/S14 Wheel and Tire Info

Also.. if you have ABS you will want rotors for an S14 w/ABS. The .1" difference will cause fitment issues.
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  #8  
Old 12-06-2010, 09:27 AM
Andrew R Andrew R is offline
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Location: NY
Posts: 19
Default Wheel information resource: Sizing, offset vs. backspace, bolt patterns, ect

Wheel information resource: Sizing, offset vs. backspace, bolt patterns, ect

I am very frequently getting PM's regarding these topics.

Figured I would post this over here.


this is a great resource for the basics:

https://www.rsracing.com/tech-wheel.html

offset calculator:

http://www.1010tires.com/WheelOffsetCalculator.asp

this one does tire size:
http://www.wheelsmaster.com/rt_specs.jsp



Offset is a measure of how far the mounting face (surface that touches the brake rotor) is from the centerline of the wheel. When you want to run a wider wheel with the same backspacing, the inner edge of the wheel will come closer to your suspension, eventually hitting the frame, control arms, coilovers or bodywork. To avoid this, wider wheels are made with lower (more negative) offsets. The side effect of this is the wheels "poke" out more. This "poke" makes the car look better by getting rid of the wheel gap almost all stock vehicles have. We try to take this a step further by stretching tires and running offsets so low that the wheel lip actually extends beyond the bodywork, while the tire tucks into the body.

Sunken:
(stock Miata wheels)


Good fit = flush *this of course may be too aggressive for some


I took a tape measure to my stock wheels and measured the gap to the fender arch from the wheel lip then used the calculator above to determine what offset I wanted. Remember that you can
always get more negative spacing with spacers -but you wanna be close -however if they are too negative (sticking out too far) it will be difficult to get them back in -if not impossible. -typically would require machining and cannot be done on most wheels without a huge compromise in strength = unsafe.

Anyway hope this helps some of you.

-A
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  #9  
Old 12-06-2010, 01:11 PM
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twistedsymphony twistedsymphony is offline
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Real Name: Mike
 
Join Date: May 2005
Location: Tilton, NH
Posts: 10,692
Default Re: Wheel and Tire Info

^good info... I've merged it with the sticky
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  #10  
Old 01-10-2012, 07:59 AM
afmafia afmafia is offline
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Default Re: Wheel and Tire Info

hi guys im looking to put the widest tire on my s14 in the rear. my wheel size is 18x9.5 15mm. i have a mild fender roll nothing crazy.i was thinking a 245-40-18 but its all up in the air.
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