New Tyre for MQ18 - 275/70R16

New Tyre for MQ18 - 275/70R16

Postby Abigeus on Mon Mar 09, 2020 3:37 pm

Hi All

I know this has been done to death a bit but wondering if people have any feedback on increasing their tyres from the stock 245/70R16 to the 275/70R16?

No lift kit/spacers everything else is stock. From my calcs it'd give about a 43mm lift. Interested in feedback on rubbing, fitting, wearing and handling.

And also whether a 275/65 would be better/worse than a 275/70.

Thanks in advance.
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Re: New Tyre for MQ18 - 275/70R16

Postby NowForThe5th on Mon Mar 09, 2020 7:25 pm

When you increase tyre size the overall diameter increases, but only half of that theoretically translates to lift. That's because, when measuring vertically, half the increase is on the bottom while the other half is on the top of the tyre.

In practice, unless you pump them up to crazy pressures, the actual lift is somewhat less because the tyre bags out a bit where it contacts the road.

So, in theory, your proposed change in size will get you a 42mm increase in diameter, half of which is 21mm, but in reality you'll probably only get 12-15mm actual extra height.

245vs275.jpg
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Re: New Tyre for MQ18 - 275/70R16

Postby Abigeus on Fri Mar 13, 2020 8:29 pm

Thanks mate appreciate the reply, is there any dramas with doing it this way? First 4WD for me so as green as the trees.
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Re: New Tyre for MQ18 - 275/70R16

Postby NowForThe5th on Sat Mar 14, 2020 4:08 am

That's up to you. In my opinion the expense on tyres to gain lift isn't worth it but good quality tyres will make a big difference in grip and longevity as well as puncture resistance.

Going bigger on tyres has an effect on gearing so those great big black mud terrain doughnuts that look so cool will turn your ute into a slug off the mark and impact on braking as well. Tyres are like life, a compromise and the key is in finding the sweet spot. For the Triton I think that sits at 265/70 for 16" wheels, maybe 265/75 depending on engine, gearbox and final drive ratios. For my V6 ML the 265/75s turned it into a pig but the diesels coped with them much better.

For anyone new to four wheeling my advice is to put more emphasis on knowledge and technique than equipment. I can't tell you how many times I've seen a well driven, almost bog standard vehicle get through tough spots that stopped big "tough" trucks whose drivers didn't have a clue.
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