New 05 Hilux SR Wheels and Tyres.

Stoney,

The 265/75/16 tyres will fit the SR hilux, but you will need flares. Next best mod is suspension. I have h/d 40mm king springs in the front, and Bilstien shocks front and rear. It rides alot better over the rough stuff.

David.

I understand you can get 50mm at the back, but the IFS limits the lift to about 40mm at the front. I'm going to fit the ARB (OME) to mine and will probably add Firestone airbags as well so I can compenate for the load when we are travelling.

Stoney,

I will have a look. You really need to have flares as when i didn't have them the amount of crap the tyres throw up was unreal, have a few chips on doors from that.

Hey Stoney-

Just bought a new SR Duel Cab myself and I'm currently researching wheel and tyre combos to replace the standard cheese cutters. Don't like the look of flares and would like to keep it all 'resonably' legal. Went through all this with my last HiLux before I settled on 265x75/16 Coopers on 90 series Prado wheels which fitted perfect with plenty of clearance and no need for flares. Currently trying to determine the wheel size/offset and suspension set up to fit a simslar size tyre on my new truck.

This is what I've come up with so far-

31's will stick out too far on your SR without flares (stone chips and cop hassles). It's not so much the size of the tyre but the offset of the 15" wheels. Most, if not all, aftermarket wheels available in the HiLux stud pattern are offset to suit the earlier live axle front end models. Aftermarket wheels in an offset more suited to the newer IFS HiLuxes (including the new 05 model), as recommended by the manufacturers, only come in 16" and 17" to the best of my knowledge. These wheels also suit the Prado. Haven't sussed out just yet the ideal offset for maximum clearance with the biggest posible tyre but I recon It'll be around 30p. ROH recommend a 30p and Mullins CSA recommend a 38p. Not too sure what offset the genuine mags are on the new Prado but I hear they're a good fit with a decent size tyre. Waiting to get my hands on some to take some measurements.

One thing that's for sure is you'll have to raise the suspension to fit a decent size tyre under the new Lux. So far I'm favouring the ARB set up with the medium rated springs and some form of air bags for the back when it's loaded up.

Keep us all informed on how you get on and what you settle for and I'll do the same.

Stoney,

The outside point the bar sticks out is around 20cm, measured from the toyota symbol. The outside point is the rubber guards not the steel bullbar.

The rims I have on at the moment are navara offset rims in 15inch and they just clear the brakes.

Hound, I put Navara 15 inch wheels on the camper trailer. Wanted something I can interchange with the 'Lux and couldn't get 15 inch with the right off set (other than getting ripped off by Toyota). They go so close to the brakes at the front, I reckon I'll only ever put them on the back and shuffle wheels around if I have to. Do you run Navara wheels on the Hilux all the time? Why would you kake 15 inch OEMs off and put Navara wheels on?

I've got 265,7015 Coopers on at the moment, but I'll go bigger next time (probably 31s) particularly if I do a lift (almost certain).

Hey Stoney-

30p stands for 30mm Positive Offset.

This means that the mating face of the rim is 30mm 'outside' the centre line of the rim.

Easiest way to measure is to lay the wheel down on flat ground, outside face down (with or without the tyre fitted).

Lay a straight edge across the top and measure the distance from ground to straight edge and call it x.

Now measure the distance from the ground to the 'mating face' of the rim (the face that contacts the hub). Call this y.

Now use the formula- x/2 - y = OFFSET

Basically- Half the overall width minus the distance between the outside and the mating face equals your offset. p = positive and n = negative.

Therefore the old-school term 'Deep-Dish' represents a negative offset... If you know what I mean...

If you could measure your rims that would be very helpfull.

also- Does anyone know what offset navara rims are?

Tuff Lux,

Is the offset relative to the width of the rim?

The reason why I say this is that I have measured a 6inch Navara rim and a 7inch 90 series Prado rim, from the back of the rim to the hub flange (the "y" distance) and they are the same, so I think that the rim offset is relative to the distance from the back of the rim and not the width (the "x/2" part). Also I don't think that you can have the rim go further towards the suspension I feel that it would need to go out closer to the guard.

I am not saying your formula is wrong as I don't completely understand this rim thing. Maybe the Navara offset is just different to the Prado rim

I will try and have a search on the net to find a diagram.

Carl

The measurement your talking about (the "y" distance) is known as the 'Backspace'. This dimension is independant of rim width.

Both dimensions are critical when choosing rims that will allow for the biggest possible tyres for your vehicle set up, with the best clearance to the inner and outer guards, brakes, chassis, etc.

OFFSET = The dimension between the mating face and the centerline of the wheel.

BACKSPACE = The dimension from the mating face to the back of the rim.

Given the rim width and either dimension, the other dimension can be calculated.

It comes down to how you (or the manufactuer) choose to describe the rim. The Yanks tend to use Backspace and Aussie manufacturers seem to prefer Offset.

That said, if a 6 inch and a 7 inch rim have the same 'Backspace' then the 'Offset' would be approx 13mm (1/2 inch) more on the 6 inch rim.

One manufacturer's "16x7 Hilux" rim is not always the same as another's. You can often get better clearance on a bigger tyre if you get your offset/backspace right. It may come down to woking out what your ideal offset is and then trying to find the closest match in the right stud pattern.

So what measurement did you come up with?

also- Were the wheels genuine stockies or aftermakket mags?

Tuff Lux

The rims that I were referring to were genuine steel 16X7 90 series Prado rims and genuine 16X6 steel Navara rims (don't know what model but my neighbor has had them for approx 6 years)

I measured the Prado rim,
Rim width from "X" = 205mm
Backspace "Y" = 120mm
Giving the offset of 17.5mm

Let me know what you think.

Carl

Tuff Lux,

You are right about the offset calculation.

I found a website that gives a description of how to measure offset, have a look (http://www.rsracing.com/tech-wheel.html#backspace)

So that mean there is only a max of 20mm different in offset between the Prado rims and the information that you have for the Hilux offset, maybe I might be able to run the Prado rims with a set of 245/75 (31") or maybe 235/85 (32").

Carl

How accurate are your measurements?

Thought those rims would have a bigger offset than that... Could be wrong.

It'd be good if you could fit 265x75/16's on it. I reccon that's the minimum width/height you'd need to keep it in proportion... The new Lux is one BIG truck.

Thanks very much for the info. Much appreciated.

Tuff Lux,

I think I am fairly close with the measurement, well as close as you can be with my wife helping me and using hacksaw blades for straight edges.

I am hoping I can use the tyres I have, but I feel that the 265's will be to wide.

I will find out the end of the month.

Carl

Hey hound-

Are you "navara" rims genuine Nissan or aftermarket rims?

I assume they're 15x7's.....

Tuff Lux,

Rims are ROH brand and they call the offset, a navara offset. Don't know why they call them navara offset but thats what there called.

Thanks very much.

Are they 15 x 7's?

Do your tyres rub at all? If so where?