Thread: 18 inch 3.0 wheels.

Originally Posted by Tombie

My concern with people OS tyre sizing an Air suspended LR (and have witnessed it happen on a P38)....

If the vehicle can drop onto the wheels upon bag failure and not the bump stops, then it is a very real, very dangerous situation..

Tombie, the D4 can't drop to the wheels. It sits on the bump stops, not the wheels, with the largest tyres that can fit without mods (285/60/18). The only rub points are very slight and front and rear of the tyres, not on top of the wheel arch. All are just contact with the plastic wheel arch liner.


There is no fear of dangerous happenings at all.

Interesting - a couple of people with 285/60-18 have told me the vehicle was unable to be driven once it dropped to bump stops; because the tyre had fully contacted said plastic (and backing steel) and wasn't moving..

There's also 2 different height bump stops, changed around 2011....

Originally Posted by Tombie

Get yourself some alloy angle from Bunnings..
Cut it into a short strip and bolt it to the Bullbar... then screw the plastic forward to the alloy

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My concern with people OS tyre sizing an Air suspended LR (and have witnessed it happen on a P38)....

If the vehicle can drop onto the wheels upon bag failure and not the bump stops, then it is a very real, very dangerous situation..

Imagine doing 110km/h down the highway when your RHF/RHR drops completely and the vehicle spears violently into oncoming traffic as that side jams up...

Police will pull one over coming off a beach / 4wd area one day, and if the scrapes under the guards are visible it's a canary...
There are rules for minimum clearances to panels etc... anything that doesn't meet this is poor by design...

Im hearing you on the oversize tyre thing. The bloke I brought my bull bar from was running 265/70/17 (from memory)tyres on his D3 - Got a flat tyre at 100km/h with camper trailer in tow, suspension dropped down (I've had mine do this with a sudden blowout) and rear tyres jammed into the guards causing another tyre to be destroyed and done a bit of damage to the inner guards as well

Originally Posted by Tombie

Interesting - a couple of people with 285/60-18 have told me the vehicle was unable to be driven once it dropped to bump stops; because the tyre had fully contacted said plastic (and backing steel) and wasn't moving..

There's also 2 different height bump stops, changed around 2011....

Yep 2 different height bump stops. Figured out which one i had because access height plus low setting on llams hits them with stock tyres and I have to quickly open the door before car raises.. Like your idea on the backing plate. ..

Definitely see your concern about failure, but i only seem to get clearancd issues at full lock, other than that they clear by quite a distance. Even then it's just plastic guards...

Russrobe

You can solve the low issue by recaibrating Llams to -20 setting on later bump stop vehicles.

Originally Posted by Tombie

Russrobe

You can solve the low issue by recaibrating Llams to -20 setting on later bump stop vehicles.

I stopped using it and bought the bear a ramp...

You're right about needing a bracket, the problem is the ARB bar's lower protection plates come back further than the original bumper by a good inch meaning the wheel liner is being pulled in an inch...

Wrong shape too.

Originally Posted by Tombie

Interesting - a couple of people with 285/60-18 have told me the vehicle was unable to be driven once it dropped to bump stops; because the tyre had fully contacted said plastic (and backing steel) and wasn't moving..

There's also 2 different height bump stops, changed around 2011....

As far as I know my 2010 has longer suspension travel than the later models and the tyres are nowhere near contacting anything in the way you have said, either in extreme off road conditions or when there is no air in the suspension system. Is this something you know of from first hand experience or is this a friend of a friend thing?


I would like to see what Gordon has to say about it.

Originally Posted by Russrobe

I'm just wondering how people are making the 275 65's fit with a bull bar?? If mine are knocking the cable ties off that they put on when you get the bar, how are there's not hitting it....

Quite well, thanks for asking....


I run 275/65/18's with a ARB bar. A bit of rubbing but only spot i haven't resolved yet is the chassis horn. I don't have any cable ties though holding my guards to the bar. I have bolts going through the plastic to captive nuts in the bar.