Thread: Sand Driving

Yep for sure

Thirty years ago I drove across the Sahara in a LWB SIII and had Michelin XS sand tires fitted. These were a remarkable tyre with very high sidewalls which, when deflated, seemed to elongate the footprint to a much greater extent than they bagged out. I suspect tyre technology has moved on since then although I do see that they are still available - at least overseas. Certainly at the time the locals swore by them.

Anyone seen them in Australia?

Cheers


Michael

Originally Posted by ozscott

The photo is not showing the relevant footprint for sand driving...front to rear.

Originally Posted by ozscott

Cheers

No, it does not. I was trying to show how the 2 sizes available bag out at 15psi. The length of the footprint is the all important bit & shown below but is discussed in another post: 18" v 19" v 20" tyre sticky patch size difference?

For a 19":
15 psi --> 275mm
18 psi --> 265mm
20 psi --> 255mm
25 psi --> 235mm
30 psi --> 220mm
37 psi --> 190mm

For an 18": (Thanks LandyAndy)
15psi --> 290mm
18psi --> 265mm
20psi --> 255mm
25psi --> 235mm
30psi --> 210mm
37psi --> 185mm

Good data, only relevant to the Tyre you are running also, as Tyre construction makes a big difference.

Originally Posted by Milton477

No, it does not. I was trying to show how the 2 sizes available bag out at 15psi. The length of the footprint is the all important bit & shown below but is discussed in another post: 18" v 19" v 20" tyre sticky patch size difference?

For a 19":
15 psi --> 275mm
18 psi --> 265mm
20 psi --> 255mm
25 psi --> 235mm
30 psi --> 220mm
37 psi --> 190mm

For an 18": (Thanks LandyAndy)
15psi --> 290mm
18psi --> 265mm
20psi --> 255mm
25psi --> 235mm
30psi --> 210mm
37psi --> 185mm

Wow, good to know. I would not have thought they were so close.

The difference that would have been good to measure would be rim to ground at each..

Originally Posted by timax

Bagging may be the wrong term then but im sure knowing i have a defender that you know what im saying. I air down to 16 psi on 235/85/16s.
And my 110 on the W-bridge was just under 2000kg. Isnt the LR4 more like 2600kg or have i missed something?

Yup, unloaded a D4 is heavier than all of the Defenders standard. I looked into this ages ago so I'm rusty on the numbers ... I think a Deefer can legally carry more load bringing their weights in at pretty close to/or heavier than a D4 depending on the model (110 - 130) when in camping mode :-).

Originally Posted by Tombie

The difference that would have been good to measure would be rim to ground at each..

I would think that the difference in the amount of "Flex" that the higher profile tyres have would be negligible on sand.
As long as you can lower the pressure enough without popping the tyre off the bead the 20 inch rims should do the job as long as the actual wheel height is the same on both sizes of rims.