Wheels and tyre advice

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Originally Posted by Redback

Just a bit more info on the sizes, if you are remote and do need to have a tyre replaced and your 265/65s are not available, you can get by with 245/70/17 if that's all they have in stock and you need to get going, the rolling diameter for it is 774.8mm, the 265/65 rolling diameter is 776.3mm, 1.5mm difference.

I have 245/70/17s on my D4, I was given this info by the local tyre guy, as we do alot of remote stuff I thought it would be good if we ever get stuck somewhere and our tyre size was not available, I could get by with the 265/65 as an alternitive.

Baz.

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Hi Baz,

Wouldn't the rolling diameter of a 65 be less than a 70 on the same rim?

Cheers,
Ben

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Originally Posted by rb30gtr

Hi Baz,

Wouldn't the rolling diameter of a 65 be less than a 70 on the same rim?

Cheers,
Ben

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No, because that 65 or 70 is the sidewall height expressed as a ratio of the tyre width. So 65% of a 265mm width versus 70% of a 245mm width.

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Originally Posted by sheerluck

No, because that 65 or 70 is the sidewall height expressed as a ratio of the tyre width. So 65% of a 265mm width versus 70% of a 245mm width.

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Thanks Dave, that makes a lot more sense :twobeers:

So will I fit 285/70/17's in my guards at off-road height, with different offset rims of course?

So the D3 is a +52mm, I was thinking of going to a +40 or less so more rim is on the outside of the stud location pushing the Tyre outwards instead on inwards?

Or am I playing with fire in a scenario not worth it?

Cheers,
Ben

Don't forget if you go above 50km/h your car will lower to normal height and you might not have enough clearance!
Plus it's not just height, you might not have enough width in your wheel arch either.

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Originally Posted by Boofla

Don't forget if you go above 50km/h your car will lower to normal height and you might not have enough clearance!
Plus it's not just height, you might not have enough width in your wheel arch either.

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Fitting LLAMS will solve the height and lowering issue, in terms of width, the extra 10mm that the tyre will protrude will still be inside the arch.

Quote:

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Originally Posted by Boofla

Don't forget if you go above 50km/h your car will lower to normal height and you might not have enough clearance!
Plus it's not just height, you might not have enough width in your wheel arch either.

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GOE rods :) Best hundred and a bit bucks I ever spent!

Quote:

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Originally Posted by sheerluck

Fitting LLAMS will solve the height and lowering issue, in terms of width, the extra 10mm that the tyre will protrude will still be inside the arch.

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Depends on what rims you run.
With my 265/65-17s and wheels with a 30mm offset they just stick out past the arch's.

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Originally Posted by Boofla

Depends on what rims you run.
With my 265/65-17s and wheels with a 30mm offset they just stick out past the arch's.

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Do you get any rubbing?

Also What wheels?

Cheers,
Ben

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Originally Posted by Boofla

Depends on what rims you run.
With my 265/65-17s and wheels with a 30mm offset they just stick out past the arch's.

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Fair comment. I was talking of wheels with the standard +53 offset. Reducing the positive offset will make them stick out further.

Be aware that in most states, there are legal implications to changing your rim offset by more than 12.5mm.

The standard +53mm offset LR 18" rim will allow fitment of a 285-width tyre without rubbing, so I wouldn't think you'd need to have a different offset for the 17" rim.

I think your real problem with 285/70R17's will be the diameter - that equates to 32.7" (831mm). Without spring spacers, this will rub fairly hard at access or whenever a wheel is compressed, and may foul at the front on lock.

Cheers,

Gordon