WA tyre/rim sizes whats legal 1992 JZA70 supra

[Azzamk2]

WA tyre/rim sizes whats legal

Car goes over the pits wednesday for yellow sticker and need to know whats legal on a 1992 jza70... stock i know was 16's with 225 rubber.

currently my car has fitted 235-40-18's front and 265-35-18's Rear

legal or not is my question??

[RA35GT]

Diameter must not be more than 15mm bigger or 26mm smaller than original.
Diameter of original (225/50/16) - 631.4mm
Diameter of rear (265/35/18) - 642.7mm (11.3mm bigger. Should be OK) \__Note corrections, still ok though
Diameter of front (235/40/18) - 645.2mm (13.8mm bigger. Should be OK). /

Tyre Aspect ratio difference between front and rear should not vary by more than 10.
40-35=5. Should be OK.

Tyres must not be more than 30% bigger than widest factory fitment.
225*1.3 = 292.5 i.e. 285 maximum tyre width allowed. 265 Should be OK.

Rim width.
Front (235/40)
Must have a maximum rim width of 9.0". 8.5" Should be OK.

Rear (265/35)
Maximum rim width of 10". 9.5". Should be OK.


Wheel track must not be more than 25mm over stock.
I'm not sure what the factory offsets are for the A70? It would need to be within 35 and 47.5 to be legal.

Guidelines available here dood. http://www.infrastructure.gov.au/roa...g_3Feb2006.pdf

You should read through and make sure to double check everything above.

[Azzamk2]

wow thanks! fronts are 8.5 rears 9.5 +35 offset all round soo it looks like im safe. (i think?)

[RA35GT]

Hey dood updated the above. I don't know what the factory offset is so don't know.

Not sure if they check will check speedo accuracy.

[Azzamk2]

sweet man thanks alot for this! factory is 7" + 44 im pretty certain (supraforums)

[JZA70R_92]

Yep factory JZA70 Rims 16 x 7 +44, 225/50/16