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Thread: 235/85R16 vs. 265/75R16 vs. 255/85R16

  1. #1
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    235/85R16 vs. 265/75R16 vs. 255/85R16

    Rightio boys and girls. Im going in tomorrow or the day after to slap down a serious pile of mullah on some new black round things. Goodyear MTR's to be exact. Im contemplating either of the three tyre sizes from the subject heading. Im currently using a set of bald arse 205/80R16's on a stock ride height disco. A lift off 2 inches is on the cards in the near future and im not worried about taking a small slice out of the back guard either. What worries me from the tyre guide on the disco web pages is the comment that the spare will not fit without spacers for the 255's . What sort of spacers and for what reasonf too wide or too fat. Is anyone running any of these sizes on the rig at the Mo. and if so are you happy with your choice.
    cheers
    Mick

  2. #2
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    I reckon go narrow not wide. 235s, not 265s. Further back in this forum is a discussion on the merits of wide vs narrow.

    If the tyre is oversize you need to make sure the local policeman doesn't notice ;-)

  3. #3
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    Now that ive give myself a sound thrashing with the baton, i'll probably be going for 235's which give a diameter of 32 inches but a width at tread of 7.3. The 265's give a diameter of 31.7 but a width at tread of 8.4 so theoretically the 265's should interfere with the body work panels the least. Ah i may aswell throw a dart at a chart on the wall at this rate. As far as the traffic branch boys go ours are more concerned with overall safety and trying to keep a lid on the idiot brigade. Who would have thought that Mt Isa would be full of clowns in skylines doing laps of the city on a Thursday night. Cant get away from em anywhere.
    cheers
    Mick

  4. #4
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    Hi Mick-Kelly
    If your suspension setup allows go for the 255/85 setup.I have a similar size on my Series(8.25x16)
    A taller narrower tyre works really well in climbing/mud/sand.
    You just need to get info from somebody with a simalar suspension setup/tyre size to see if they fit your vehicle.
    Andrew
    DISCOVERY IS TO BE DISOWNED
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  5. #5
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    G'day guys
    Suspension is stock at the moment but will be getting 2 inch higher Kings and a fresh set of Bilsteins in the near future. A second question or rather the first in a different light is what is better on corrugated gravel, wider or skinny. My first thought was skinny as less contact area gives less area for punctures but up here tyres seem t loose it in the side wall. Hence why every second fourby has these MTR's with a 3 ply side wall. The plot thickens.
    cheers
    Mick

  6. #6
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    Hi Mick
    In my experience wide tyres are bad news in gravel,and muddy wet gravel roads as they wear.They "hydroplane" just as well on gravel as they do on a wet sealed road.
    The narrower/taller tyres give more "footprint" area but in a longer pattern than wider.This is what improves their performance and ride over wide tyres.
    Andrew
    DISCOVERY IS TO BE DISOWNED
    Midlife Crisis.Im going to get stuck into mine early and ENJOY it.
    Snow White MY14 TDV6 D4
    Alotta Fagina MY14 CAT 12M Motor Grader
    2003 Stacer 525 Sea Master Sport
    I made the 1 millionth AULRO post

  7. #7
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    Originally posted by LandyAndy
    Hi Mick
    In my experience wide tyres are bad news in gravel,and muddy wet gravel roads as they wear.They "hydroplane" just as well on gravel as they do on a wet sealed road.
    The narrower/taller tyres give more "footprint" area but in a longer pattern than wider.This is what improves their performance and ride over wide tyres.
    Andrew
    Agreed...mostly! The contact patch of a tyre is proportional to the vehicle's weight and the pressure the in the tyre. A narrow tyre of say 32 inch will be the same footpring as a wide tyre, but as LA says above the wider tyre will have a wide, short footprint instead of a long, narrow one. But the contact patch overall size is exactly the same.

    Take a look at the 4WD race vehicles on events like the Rally of Australia. 235/86/16 is the go for them. Narrow tyres may not look cool, but they've always been fitted to Landrovers and you'd expect them to know a thing or two about the subject.

    Narrow tyres are not good if you are racing on bitumen in the dry though. Too much movement between the rim and tyre.

  8. #8
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    <div class='quotetop'>QUOTE</div><div class='quotemain'>Narrow tyres may not look cool, but they've always been fitted to Landrovers and you'd expect them to know a thing or two about the subject.[/b][/quote]

    I don't know whether I would always agree with the last part of that sentence. :wink:

    If you're set on Goodyear MTR's then I think your only choice is between 265 & 235. AFAIK they don't offer 255/85's.



    Paul [img]style_emoticons/<#EMO_DIR#>/biggrin.gif[/img]

  9. #9
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    Thank you gentlemen for your sage words, Ive placed the order for some 235's which should with luck be in town tomorrow. then its just up to me to find a fun track to let em lose on.
    cheers
    Mick

  10. #10
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    I have these tyres on my 83 Rangie (235/85R16 Goodyear MT/R's) and done over 20,000 kms on them. They are great off-road and love rocks best. Mud they are about par with a all-terrain, marginally better maybe.

    I had to replace one recently because the side had a large cut in it and was not reparable as you could see the chords (went to 3 places and they all said it was a write off!!). It never went down ot was dangerous but replaced it anyway, so I can be testiment to the 3 ply sidewall construction.

    I paidm $265 on intrest free for mine (they were $290 retail 8O ). Enjoy them

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