Aftermarket Wheels on the Z31

Stock Wheel Information

General Information

This page is a guide to helping you determine the best sized wheels for your application. Read all the information on this page. Pay attention to the disclaimer at the bottom. Read all of them. Read them again. Then read them a third time. Any questions asked on the board that can be answered by these disclaimers will get you a verbal lashing and subject you to public humiliation.

Plus Sizing

Width Ratio Diameter Wheel
Width
Outside
Dia (mm)
Outside
Dia (in)
Diff
(mm)
Diff
(in)
215 60 15 6.5 639.0 25.157 49.9 1.965
225 50 16 7.0 631.4 24.858 47.2 1.858
235 55 15 8.0 639.5 25.177 31.8 1.252
255 50 15 8.5 636.0 25.039 39.1 1.539
285 45 15 9.5 637.5 25.098 43.7 1.720
205 55 16 6.5 631.9 24.878 39.9 1.571
255 45 16 8.5 635.9 25.035 39.1 1.539
285 40 16 9.5 634.4 24.976 43.7 1.720
225 45 17 7.5 634.3 24.972 34.5 1.358
255 40 17 9.0 635.8 25.031 26.4 1.039
225 40 18 8.0 637.2 25.087 21.8 0.858
255 35 18 9.0 635.7 25.028 26.7 0.539
215 35 19 7.5 633.1 24.925 24.5 0.465
255 30 19 9.0 635.6 25.024 26.7 0.539
255 25 20 9.0 635.5 25.020 26.7 0.539

Tire Sizing

Appl Model 84/85 F 84/85 R AE/86 F AE/86 R 87-89 F 87-89 R
width min max min max min max min max min max min max
205 3 42 3 62 -17 42 -15 62 -7 52 -12 72
215 8 37 8 57 -12 37 -10 57 -2 47 -7 67
225 13 32 13 52 -7 32 -5 52 3 42 -2 62
235 18 27 18 47 -2 27 0 47 8 37 3 57
245 23 42 3 22 5 42 13 32 8 52
255 28 37 8 17 10 37 18 27 13 47
265 15 32 18 42
275 20 27 23 37
285 28 32

Wheel Sizing

Appl Model 84/85 F 84/85 R AE/86 F AE/86 R 87-89 F 87-89 R
width min max min max min max min max min max min max
7.0 2 41 2 66 -16 41 -14 66 -6 53 -6 76
7.5 9 34 9 59 -9 34 -7 59 1 46 1 69
8.0 15 28 15 53 -3 28 -1 53 7 40 7 63
8.5 21 22 21 47 3 22 5 47 13 34 13 57
9.0 28 40 10 15 12 40 20 27 20 50
9.5 34 34 18 34 26 44
10.0 24 28 32 38

Disclaimer

  • These numbers are for cars with the stock suspension.
  • Please note that these are slightly conservative estimates.
  • Not all wheels are created equally and may have more or less overhang depending on manufacturer and design.
  • These numbers were calculated based off unverified information provided by users of wheelshow.
  • Numbers were mostly based off 17” wheels. Offset information will only vary by +/- 1mm for each 1” difference in diameter.
  • Tire sizing information is based on tires that fall within the original overall tire diameter of 25 inches.
  • The tables above show offset ranges. Pick an offset between the minimum and maximum recommended offset.
  • Lower offset numbers will bring the tire/wheel out to the edge of the car. This is Good!
  • Higher numbers will set the wheels farther under the car. This is battleship and this is BAD!
  • NA strut housings will allow for a slightly higher offset.
  • Adding spacers will reduce the offset number. i.e. Adding a 25mm spacer/adapter to a wheel with 25mm offset will effectively create a 0 offset wheel.

I NEED MORE HELP

Spacers can only lower the offset. To get more offset, you'd have to shave the hub of the wheel. This would be very expensive and then you might not clear your brakes. Lucky for you, most wheels available these days already come with high offsets.

To figure out how much of a spacer/adapter you need, it is only simple math. For instance, you pick up a set of wheels that are 17×7 with an offset of +42 for your 86 300ZX. First, expect people (especially butter) to laugh at you. Second, get some adapters IMMEDIATELY. To determine the actual spacer width you need, look at the chart above. Find the 7.0” width row. Find the applicable year column. Look at the number where they meet. Minimum recommended offset is -16mm. To determine thickness, you subtract the recommended offset from the wheel's offset. In this case, you'd subtract -16 from 42. 42 - (-16) = 58. You'd want spacers/adapters that are 58mm thick. Or roughly 2”.

 
modifications/wheels.txt · Last modified: 2014/09/08 18:04 (external edit)
 
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