Changing Tyre Sizes on Amarok

Hi all,

So I am thinking of upgrading my car (2014 Amarok) tyres from HT to all terrains. Im thinking of buying tyres with the dimensions of 265/70/17 to replace the existing ones which is 245/65/17.
My question is will the rims fit good on the 265/70/17?

Also anything I need to know before I get them.

Thanks I’m advance.

Comments

  • +2

    What width are your wheels? You would technically be illegal, as diameter will have increased by more than 50mm. It will accelerate slower and braking will be worse. Will also use more fuel.

    • Thanks for your reply. I’m not sure about the width tbh. I’ll have to check.

      • +1

        Plus you’ll need to check your Speedo for accuracy. I fitted 2 size bigger tyres to my navara and the speedo changed from 10% over to being spot on.

  • +2

    How much of the time are you driving on terrain other than bitumen?

    • I am a tradie, I will be mainly driving it/ from work.

      • +11

        So 100m off the road and 20,000ks on the road then.

        Save your money and just get the same size as you have now.

  • +2

    HT to all terrain because you'll be primarily using the car offroad now or just to make it look better? If it's to make it look better you will most likely regret it.

    • Really? I use the car from/to work and sometimes for family trips.

    • +2

      It does looks cool though. No regrets.

      https://www.youtube.com/watch?v=qkryj0A723c

      • :) Doesn't even have to look that spectacular. Just reduced braking & grip, increased noise & fuel consumption & cost of tyres. But I guess all-terrain tyres will look good and improve the performance offroad so it probably makes up for it :)

  • Generally it’s not the rims that are the problem, it’s rubbing on inner guards and stuff when turning or suspension articulation. You’ve selected a size both wider and taller than stock.

    Check out some Amarok groups on forum or faceache. See what others have fitted. Alternatively, check out the Bunnings carpark, you’re bound to find an amaorok with bigger s tyres and you can check the size there. You may need to get a suspension lift with bigger tyres

    I know a guy who got slightly larger tyres on his Amarok because they were cheaper due to being a more common size. Don’t know what size he ended up with. .

    FWIW, AT tyres and not driving off road are a waste of money. If you just want tyres to look bigger, get HT in a bigger size.

  • You may or may not need to recalibrate your speedometer if you're changing diameter.

    • That’s easy enough to do. Because the factory speedo often over-reads you just need to use a GPS to check your speed at each diffeeent speed limit and remember what it is.

      My old ute went from about 10% over to pretty much accurate when I fitted bigger tyres.

  • When the speedo shows 100kph, you'll actually be doing 107kph

    Have fun with that one

    • Not if the speedo was already showing 7km/h high.

  • Here is all the info you need

    Don't do it. Bloody stupid if you do.

    • Totally agree. Totally illegal and totally stupid idea as well.

      • +1

        Sidewall increases by 25mm. Diameter increases by 54mm. Highly unlikely you’d get stung when a 50mm diameter increase is within the rules. It’ll depend on the individual tyre somewhat, it could be a smaller design and be OK, but could also be larger than 54mm.

        • +1

          Is it worth the risk if the insurance assessor spots it?

          • +1

            @MS Paint: Just depends how tough you want your tradie bus to look.
            5000km and you’ll be down a couple of mm of diameter anyway.

    • Handy site
      .

  • I might add that any tyre place that would do this, should be shut down.

    • You can legally change tyre sizes without engineering by 50mm diameter. Above that just requires engineering (but not many would do that)

    • +2

      Hahahaha

  • non standard tyres may void insurance

  • +1

    Just thought to mention roadholding in the wet - even switching from roadgoing tyres to all terrain you will notice the difference. It's a compromise and gets slippery quick!

  • +1

    Have a chat with a good tyre shop as Amaroks can be a bit weird with tyre size increases but what your proposing is not as extreme as some are making it out to be, you're only going up from 29.5"to 31.6" (btw the internet says 2014 Amaroks came with 245/70/17 or 30.5" tyres standard)
    The way some here are carrying on it's like you're talking about a 4" lift and 35s. If my standard tyre size assumptions are correct what you're proposing is completely legal. There should be a tyre placard in the driver's door that lists wheel and tyre specs.

    That being said you'd be surprised at how far highway terrains can get you with good tyre pressure, especially if it sounds like you don't get off the bitumen often.

    The only other benefit worth factoring is that a good A/T will come in light truck construction (LT) which might be better suited to your work use if you are carrying significant weight or driving around sites where you might be susceptible to punctures.

    Be aware some ATs like BFG KO2s (which look great) are slippy on wet bitumen, I've had them on 2 X different utes and only stick with them due to off-road performance and and being long wearing, but I might be tempted to go Maxxis RZR next time

    • Be aware some ATs like BFG KO2s (which look great) are slippy on wet bitumen

      Concur. I’ve got them on now and They are terrible in the wet. The 50% cheaper no name Chinese tyres I bought last were 100% better in the wet.

  • I'd suggest you ask the question at an Amarok forum. You'll get more informed answers of people that have already done it.

    Your 17" rims are 8" wide. Your new size will fit on the rim and will be just beyond legal at +7.1%. NSW is +-7% these days. Personally I'd take the risk.

    https://www.nsw.gov.au/sites/default/files/2021-02/RMS-Guide…

    https://www.nsw.gov.au/sites/default/files/2021-02/RMS-infos…

    Have you checked the accuracy of the speedometer? For that change in diameter your current speedo will need to read about 100kph when doing an actual 92kph for it to become 100=100 with the new size.

    Will the new tyre touch any of the chassis, suspension parts or bodywork when going from lock-to-lock and under full suspension articulation?

    What AT are you considering? I run Hankook Dynapro AT2 RF11 on the pajero sport. The wet grip is no worse than the highway bridgestones I had previous (I went from 265/60r18 to 275/65r18). Dry grip is better.
    It does accelerate slower due to the change in gearing and the extra weight (LT rated tyres).
    It does use 0.5l/100km more fuel but we are talking which costs me an extra $5.50 per 500km which for me is about 3 weeks use.

    Don't forget that you will need 5 tyres.

    Amarok has the same stud pattern as some of the BMW SUVs, so that can be a cheap upgrade path when somebody changes their new rims/tyres.

    • With your Amarok forum suggestion, how likely would the people making mistakes be to admit their mistakes? "My fully sick massive wheels and offroad tyres are perfectly grippy on the highway at 110km/h" would likely be a common answer :)

      • Most people will admit when their tyres are crap or when they interfere with bodywork or suspension. Most forums I've been involved with have been quite informative if you learn to interpret context.

        I have a Pajero Sport. When asked what the negatives of them are I say:
        1) Gutless.
        Other PS owners tell me I'm wrong but it's close to the same power and torque as my previous car that weighed 800kg less.

        2) heavy on fuel around town because of the gutless engine pushing 2.2 tonne.
        It suffers from terrible turbo lag and you have to put the boot in to get it to move. It can't help but use fuel. Others get better economy around town because their town is Wagga Wagga, not Inner City Sydney.

        3) 68l fuel tank lacks range.
        It's 12-20 litres less than the competition. I get 550km from a fill. My old car got 900km.
        4) obviously built to a price
        It costs $15k-$25k less than the competition. Corners have to be cut somewhere

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