big wheels on hilux

Well you could fit the new 54inchers if you like, on say 15x15inch rims, but would require a lot of extras.

What do you want to do with the car?
www.snakeracing.com.au is your Hilux friend

BOB,
If your looking at keeping the 4by road worthyand insurable, as big as your tyre placard says you can have.
Relaxed

you should get 32s on with no lift, or cutting.

if you want to go bigger, then suspensino comes into it, as does engineers, brakes, etc steering lots more

30X9.50X15 any bigger and they will rub.

G'day bob.

Am running 265/75R16 (32's)on my 1999 hilux for the road and 32/9.5R15 simex centipedes for offroad. They fit fine. But you do have to do a bit of trimming at the rear of the front gaurd and maybe a little at the rear. If you dodn't mind doing a bit of trimming 32's fit fine. 31's will fit with a little suspension lift.

With all of the hot air on the subject of how much larger can tyres be in regards to the tyre placard I think its worthwile for anyone in Qld to read:

Qld Transport - Vehicle Mods

Especially page 16 which says a tyre can increase by not more than 15mm, and decrease by not more than 25mm.

For people to say they work in the industry and then quote figures like "increase by not more than 25mm" is a worry. If you want the facts get it in writing! The web site above is an excellent guide for any vehicle mods.

On a side note Ive heard people say you can have tyres as wide as you like as long as the guards cover then. The guide clearly says no more than 1.3times manufactures max specified width, and no more than 1.5times for 4wd's with beam axels. Very interesting.

Anyway if you live in Qld take a read and use it as your modification bible.

Cheers,

Glenn.

i have a bravo with 215/85x16 they are equal to 31" i think and no probs . a hilux should bleep that in
but watch the fuel economy and power drop with any bigger
xr500

Bob

I own a 2001 hilux and have recently been asking the same question! The other posted replies pretty much sum most of it up but for what its worth.......

If you are living in NSW, go to the RTA and ask for a copy of "Vehicle Standards Information Sheet No 9" - containing guidelines for alternative wheels and tyres.
Standard hilux tyres 205R16c on 16 rims have a total diameter of 732mm and total width of 203mm. Legally as an alternative you can fit 235/75's on 15inch rims or 235/70R on 16 inch rims.

A couple of different tyre companies have suggested fitting 265/70R on 16 inch rims or 31/10.5R15's but since picking up the RTA standards I have discovered that they are full of bleep and just want the sale. These can't be fitted legally in NSW without an engineers certtificate becuase the tyre diameter exceeds a tolerance of 15mm - go to www.bridgestone.com.au/tyre_div/selector/tyrespecs/D693.htm for a lsit of tyre specifications on diameteres and widths for info and compare this back to the RTA specifications and the 205R16c's specs1.

Following, at the same time when you're at the motor registry and still want to fit bigger tyres, you should probably grab a copy of the Vehicle Standard Information Sheet No 15 (Engineering signatories). To keep your "bigger" tyres legal in NSW (and your insurer happy) you'll need an engineering certificate from one of the approved engineers on that sheet. The certificate costs about $121.00 just to certify the new rims and tyres. You could probably expect to pay more if there are suspension modifications to certify.

On top of this, to get the certificate, you need to keep the wheels within the guards (you'll need to fit flares) and fix and calibrate your speedo & odometer. You can apparently get aftermarket speedo cable adapters to do this (ie from Castlemaine Hot Rod shop or other custom car mechanic shops, since I don't endorse any company in particular but the castlemaine shop is the only one I know at the moment that sells adapators for speedo cables (look on the internet with these key words) Alternative, if you want to fit 31 by 10.5's or 265/70R16's like I do, It may be possible to take speedo cable gears from a cruiser and swap them into your hilux. I still have to ring Toyota Customer Care Line to check if this is possible but the local toylota dealership people that I spoke to this morning think that this may be possible (new speedo gears cost about 50-60 $ approx).

Finally, don't go to wild with the changes. 31.5 by 10s will put your speedo out of whack by about 5% even though they have a total diameter of only 43mm more (This equates to 435 wheel revolutions by km compared to 460 per km travelled) I am not sure what this will do to the hilux gearing but I spoke to a guy with an early model hilux pusihing 33 inchers and he said that apart from the suspension modifiocations to get them to fit under the guards, the diesel was to gutless to push them, particulary in the sand and he then had to fit a turbo to make up for it.

Thats about all I know on the subject, if I manage to fit 31 by 10's under my hilux I will make another post and tell you how things went -

PS, thanks to the other people who posted on this topic, particularty those who commented on what fits under the guards of a hilux without scrubbing (max 30 by 9.5's) I think that you may have saved me much financial pain!

Regards and cheers Roland