wheel/tire size for Hilux

I am pretty sure the original tyre size was 205R16 and if so the OD is 747mm. If you want to stay legal and not void insurance etc you need to stay within 50mm OD of the tyre size recommended on the tyre placard which is situated on the right 'B' pillar. Pretty sure you can go up to 33x10.5R15 but you just need to check the OD first and make sure a 7" wide rim is within the range recommended for the 33's.

I had 89 SR5 2.8D hilux D/Cab LN106 and had BF's A/T's 31/10/15's, If you go any bigger they will scrape on inner guards when turning or flexing when 4wdriving. It will also make a difference in take off speed etc and if you have a 2.8D then you will no exactly what I mean when needing all the power you can get LOL. Above is correct myn did come with 16's from the factory but I put Sunraysia's on mine as you obviously have. Personaly I wouldnt go any bigger but everybody to there own depends on what you use it for, as mentioned above insurance if with the NRMA as I am WILL BE an issue if going wider. They will only insure wheels an inch wider then what they come from the factory with there was nothing said about rolling diameter. Regards Steve M