tyres

In my case a; a Troopy towing a 3 tonne caravan on skinnies at 50 PSI then changing to wider 265 ATR’s run at 40 PSI - the fuel consumption went up by about 10% - tested on bitumen.

Barry

I have a 205 x 16 muddie and a 205 street tyre for my Lux and change them depending on where I am going. Three years ago as part of a long trip, I drove from Broken Hill to Roxby Downs on the street tyres and got 9.77 l/100 ks, Last year over the same distance on the muddies ( Wrangler TG) I got 9.51 l/100 k.

On that first trip from Roxby to Hawker via Maree on the street tyres it was 9.3. Last year from Roxby to Oodnadatta on muddies it was 9.1. It was 7.87 from Alice Springs to Kintore. From Kintore down the Sandy Blight to Giles was 8.9

Last week from Sydney to Canberra on the street tyres, it was 10.28 l/100.

The best sealed road consumption with the muddies was on a very slow overnight trip from Lightning Ridge to Sydney with the car almost fully loaded. The figure was exactly 8 l/100.

There is very little difference between the two but I am sure the increase in consumption with the street tyres is due to increased speed and wind resistance on sealed roads. This was never more evident than four years ago when I used 12.5 l/100 between Birdsville and Maree on the muddies while going far too fast for my liking trying to keep up with a convoy. All of those other figures were just my wife and I traveling on our own.

Most 4WDs have the aerodynamics of a brick and when you push them along quickly you will notice the fuel consumption rising rapidly.

I am not surprised at what Dennis said. The extra rolling resistance of wider tyres will increase fuel consumption.

Evening Barry.

Size will be the determining factor in affecting power and fuel economy. If they remain the same size as a standard tyre fitted to your vehicle, the type of tyre AT/muddie will only affect ride, handling and noise.

The quick search I did revealed that there are 4222 posts on EO that cover tyres. The top 25 in the forum section answered just about every one of your questions. A bit of research will always stop an outbreak of polarised opinions that tyres/fridges/solar/dcdc chargers can cause

There was also a thread a couple of days ago comparing Muddies. Here's the link;

Thread 106490

And check this out as well;

Tyres



Cheers Mick

On a side note:

I use Bridgestone A/T's on the 80 due to side wall reliability.
Has anyone ever read the fine print for A/T tyes?
Bridgestone for example, goes a little like this..........
"All warranty is voided if taken off road"
Go figure!

Hi Barry, yes, I would never run Coopers or Pirelli's again either. I swapped to 31 x 10.5Rs on the standard rims on my 08 ranger which works well. Like Eldorado's or Maxxis .BTW, have had nearly 200000 trouble free k's from ranger, BUT important you use high performance oils too. As for fuel consumption, get around 11Lt/100ks up to 14+ if pushed hard.