Western Australian police have been cracking down on modified four-wheel drives recently, according to various Facebook posts by Great Southern District – WA Police. These posts are highlighting illegal modifications made to four-wheel drives such as fitting oversized tyres that stick out from the vehicles guards


One of the posts from W.A, a GQ Patrol with some worn-out Maxxis Bighorns. No rear bumper and tyres sticking right out probably didn’t do him any favours! Negative point for bad parking, as well.

We’d like to say it from the start, that illegally modified vehicles, be they 2WD or 4WD have no place on our roads. We also think using social media is a novel way of educating motorists to some of the unroadworthy modifications they might have genuinely not be aware of. After all, the local tyre shop is interested in selling and fitting tyres, it is your responsibility to understand what is the road legal tyre size for your vehicle. There was one social media post from Great Southern District – WA Police that caught our attention in particular and it seemed the  the 4WD community was also less than impressed judging by the responses



It’s worth noting that what the police has said is incorrect: 35″ tyres do certainly have a place on public roads (some have this tyre size from the factory), and can be easily engineered to suit the GU Patrol.This post states: “35in tyres have no place on this vehicle on our roads”, with a picture of a GU Patrol wearing 35″ mud terrains. While under the National Code of Practise, 35in tyres would be too large to be compliant for road use. However, we would like to argue that it could be done with suitable engineering consultation and resulting modification to steering, braking and suspension components. This would also involve emergency swerve testing (and the costs associated), but we have seen Patrols engineered for 35in tyres in the past, that operated in a safe manner. This begs the question however, should 35in tyres be banned from our roads (and tracks) all together?



This GU particular Patrol belongs to editor Scott, and has been engineered for all modifications, including suspension and 35in tyres.


Do you think 35″ tyres should be banned? Let us know in the comments below.

Another massive issue among four-wheel drivers, not just in W.A but Australia wide, is the mounting of LED light bars. While in some States (South Australia and Queensland) it is considered roadworthy to mount an LED light bar to the roof of a vehicle, it isn’t considered a roadworthy modification in other States such as NSW. So does this mean that if you own a vehicle registered in South Australia, with a roof mounted LED light bar, and drive through NSW you could be issued with a defect notice? Seems kind of silly, and it really does further prove the need for a National Code Of Practise Australia wide to standardise these vehicle modifications.


Article From Mr4x4 

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Comments 26

  1. My 80 ha s 3 inch lift and 285.75.16.
    Was 6 inch with 315.75.16…
    Am i legal to drive on wa roads…
    Have a lot of mods. All have required documents that i have in the car….

    1. Your lift and tyres would be considered illegal.
      Can only go 50mm max height with tyres and suspension together.
      With engineering I believe its 125mm total lift (suspension and tyres).
      The biggest tyres can be are 50mm bigger than standard but that height is taken into account with the overall height too.

    2. all vehicles have a eye brow height which is the distance from the centre of the wheel to bottom of wheel arch, obtain that height from dept of transport and go from there, wheels must be inside guards and if not put some flares on, also check if tracking has been affected this would also make it illegal for wa.

  2. There should be one set of rules and one registration nationally. This state by state stuff is bullshit and confusing. We may have a large land mass but we only have a population of appropriately 27M.

  3. I wish the other states would catch up with WA one look at the Patrol no mud flaps no bumper wiring for trailer plug untidy so you would be right in thinking that theirs a fair chance that the rest of the vehicle would be maintained the same NOT

  4. I say Book em Daniel !
    Honestly don`t see the point ?
    If you want to drive around in a tractor at least buy a decent one – perhaps John Deere can help?

  5. It is amazing how many un-roadworthy 4×4’s are getting around … Daily you see tyres sticking out way past the guards – worst I’ve seen was 100mm, and I’m talking suburban Melbourne roads.

    Do the drivers actually realise that if they have an accident in an UNroadworthy car they actually have NO INSURANCE COVER !! There is fine print in insurance policies that states your vehicle MUST be in a good state of repair and roadworthy.

  6. If a vehicle has been engineered for 35″ tyres, or larger for that matter, then it is ridiculous to ban them. If such was not safe then engineering approval simply would not be made. With regard to the WA police post – If 35″ (or larger) tyres are not suitable for ‘their’ roads then they had better get busy writing defect notices for all those heavy vehicles running all over the state.
    It is hard to understand the protracted thinking about light bars by bureaucrats in ‘nanny states’ like NSW. Surely, if a light bar is properly wired up to operate when high beam is in operation, and only when the isolation switch is in the ‘on’ position, then it can only add to night time driving safety! If spot lights are allowed, on the bull bar and on the roof rack, then logically so should light bars be allowed. It really is way past time for a National Code of Practise to be implemented.

  7. It’s a pity the states can’t get their act together & standardise their laws.
    Most of us would cross state borders on our trips, we can be picked up for an infringement in one state innocently which may not be illegal in our own-might as well stay home instead of visiting places interstate, save some money but put a dent in interstate tourism.

  8. I am a hundred percent with light bars on vehicles , totally a FULL safety feature , that i believe should be mandatory, to all vehicles that travel in the bush.
    A few years back just on 8 , i had a fairly good accident hitting a cow on the highway , i stand firm by if i had better lighting that includes the factory fitted spotlights on my patrol those are useless ,8 years ago things just might have been differant , such as 16 operations and 8 years later im stuffed , i cant work or enjoy my hobbies or life much at all now , all because some bloody idiot dos’nt know how to shut gates ,
    Both my Nissan patrols have good lighting now including correctly fitted light bars and HID spot lights , at midnight i have daylight now ,
    How i wish i had them on my vehicle 8 years ago !!
    Most people and especially insurance company’s have absolutly no idea on what one is covered for or goes through after hitting a farm animal , i do now , bugga all at the time of my accident, now my wife has got the law changed , and by herself i might add , things are a little differant for the general public now , but you wont find insurance company’s telling one about it
    I most certainly will if you want to contact me my email is below

    1. Hi Paul,
      Thanks for your comments. Am interested to know more about the intricacies of insurance claims when dealing with “animal hits”. Not sure how I can obtain your email to communicate further. Maybe the Club 4×4 moderator can assist?


  9. Firstly light bars are really great for lighting up the road at night and make for safer country driving from my experience. On the beach they are a nightmare because they are so bright that oncoming vehicles way ahead in the distance who have their light bars on and who think they are far enough away, make driving extremely dangerous. The flat sand and the reflection mean your vision is interrupted so badly that you need to drop to a crawl to avoid danger. I have a light bar myself and it’s not until I flick my light bar that the oncoming vehicle realises that the distance away does little to dampen the intensity. Roof mounted bars I’m not so sure?? I’ve been blinded a few times with oncoming vehicles who have had a light bar on the roof rack and this sits above the eye line of the driver. So by the time the driver sees me coming, I’ve already had a face of light bar. As for over sized tyres and excessive lifts, I feel these are best kept for competition and off the roads as quite often this combination has a serious affect on the vehicles accident avoidance control compared to stock or sensibly modified vehicles. There is one inclusion I feel is more serious than light bar positioning and that is the attachment of the ‘cheese cutter’ type rod holders on bull bars. The different types and how they are attached are quite scary if the vehicle hit a pedestrian. This is something I feel needs immediate attention due to the shear numbers. Great for the once a year trip to the beach to fish or the occassional fishing trip but not great 365 days a year commuting. If they are so important to have everyday then make the law that when fitted they must be holding fishing rods, OR use a safer option like the ‘Rodeze’ (or whatever it is called) that will bend on impact and has no sharp edges. I thought I’d throw that in!!

    1. like your comments, fitting rods though limit forward vision, they need to have roof carriers only and when at the beach fishing have quick release attachment to fit to bull/roo bar.

  10. If you read what is said in the comment“35in tyres have no place on this vehicle on our roads”, it is referring to “this vehicle”, not all vehicles. Probably because it is not engineered for the tyres. What needs to be taken into account is all the other things that appear to be wrong with the vehicle as well. Is it roadworthy keeping in mind the safety of all other road users.

  11. South Australia seems weird, 7969 I drove a Cooper “S” to Adelaide, ex N.S.W. Special Trafic Patrol (now highway patrol) & was stopped at Murray Bridge & told the car was illegal as the front tyres (olympic gt radials), told them coming about last owners, also coming straight back out next day. Fast forward to 2012 & noticed that “P” drivers could only have a 4 cyl car! This one now about allowing roof mounted light bars contradicts their ideas. Myself, I don’t mind them on the front, but below the centreline of the headlamps like the old rally car rules. We have pizzas being delivered around here that put shame to a 747 on final approach at night (street is just 480 mtrs & has 7 light poles), I say one nation wide rules book.

  12. I don’t know of any 4×4 other than trucks that come standard with 35inch tyres.I think the largest tyre fitted to any common 4×4 is a 33 inch tyre correct me if I’m wrong

  13. Yes quite right. Any sharp non original maker options are likely illegal. That includes antennas and driving lights on the bull/nudge bar. It’s the slacko yobos who don’t care about other road users who do these criminal mods. Hope the cops throw the book at all of them. The rest of us make an effort to comply and obtain engineering certificates and yes it does cost extra, but at least its done right.

  14. A vehicle legally registered in a state can be driven over borders and remains legal although local vehicles would be illegal. Under the Australian Constitution it is covered as it is interstate trade that can not be restricted.

    As for lights nothing can be above or forward on the bull bar. Driving at night I feel the speed limit should be lowered by 20kph for anything equal or above 80kph.

  15. I can see as a 4×4 enthusiast would think this would be great, but from an engineering point of view this type of vehicle should not be on a public road. The roll and list behaviour would mean that it could never meet Australian Design Rules in any state of Australia.
    Lift kits may provide great ground clearance but the changes to driveline angles and centre of gravity make this type of vehicle very unpredictable in an emergency situation.

  16. Lets get some action to have national licencing and road rules, the individual state regulations are simply crazy we are one country and need pollies to get off their bums and get some activity gojng on this matter.

  17. Hi Guys, this link might help you in WA: https://www.transport.wa.gov.au/licensing/modify-a-light-vehicle-minor-no-inspection.asp – Tyre sizes are an interesting read! Bottom line is if it looks good you are ok if it looks like its from Bogansville then it will attract Police attention. My top tip is…ask your garage / mechanic or even stop and ask a Traffic Police Officer his /her advice. But when given follow through and acvt on that advice and you will be all good. Afterall we all want our vehicles not only looking good but also safe. Imagine how you would feel for the rest of your life if your car wiped out a family in a 7 seater because of your modifications not being to standard? No comment required; I will leaveyou to think about this and happy 4WD…ing 🙂

  18. How about exhausts…most of the ones that come up my way hoon around with no mufflers…so straight pipe right through… consider other people trying to live in there own town!!!! Hoon past at 2am 3 or 4 at a time….over it…park where ever they want… tailgating and aggressive behaviour on the roads… basically a GQ or anything similar is a redneck 4wd commodore driver..

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