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Where the rubber hits the road. Discussion about drive train; (locking) diffs; wheels; hubs; suspension and, of course, tyres

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  #1  
Old 13-01-20
Baki bakic Baki bakic is offline
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Default At vs ht tires

Atm running all terrain tires.condsidering to buy 4 new ht tires because of my 99% city driving and 1% camping and light off roading.except low or no noise with ht tires how lesser consumption i can expect with ht tires? Atm 20l per 100,lpg.car is 2002 model np exceed ,no modifications.tnx
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Old 14-01-20
erad erad is offline
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If you are lucky, you may see a reduction in fuel usage. The exact amount is difficult to say - I reckon 5% at most. The type of driving you do (traffic, stop/start etc) has more influence on fuel consumption. Most of my driving is highway, but I use A/T tyres for peace of mind when I am on back tracks somewhere. The last thing I want is a puncture whilst going up or down a fire trail somewhere.
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Old 14-01-20
bobthekelpy bobthekelpy is offline
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Can't offer any advice, but am watching with interest.

My NT has Hankook ATM LT's on at the moment. Most of our use is day to day driving, with towing a small van 1/2 dozen times a year and otherwise just occasional gravel roads. No serious 4x4ing. When these are worn, I've been thinking the same thing; switching to a HT tyre instead of LT to try and get better fuel economy, less road noise etc.
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Old 14-01-20
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Not are AT tyres are the same.

There are Passenger construction tyres with AT tread patterns and these will use marginally more fuel because of the increased rolling friction caused by the more aggressive tread pattern.

Then there are Light Truck construction tyres which are much heavier in weight, and it is this increase in weight (rolling mass) that consumes significant extra fuel combine this with aggressive tread pattern and you get a double hit on the fuel consumption. Go up a profile in sidewall and or increase the tyre width and you get a further increase in fuel consumption. You will notice the most difference in stop start traffic, if you run over size diameter and over width mud tyres you could easily increase fuel consumption by 30% in stop start city driving.

OJ.
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Old 14-01-20
erad erad is offline
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Further to OJ's comments above, if you look at the details on the sidewalls, you will see the number f plies in the tyre construction. the heavier A/T tyres normally have 3 plies in the sidewalls. This makes the sidewalls stiffer and thus they will cause a higher fuel consumption. The heavier tyres also are stiffer - poorer ride quality.
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Old 14-01-20
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Quote:
Originally Posted by erad View Post
Further to OJ's comments above, if you look at the details on the sidewalls, you will see the number f plies in the tyre construction. the heavier A/T tyres normally have 3 plies in the sidewalls. This makes the sidewalls stiffer and thus they will cause a higher fuel consumption. The heavier tyres also are stiffer - poorer ride quality.
The load index is the easiest way to get an indication of the weight of the tyre.
As a guide for tyre that suits mid size 4wds with 16", 17" and 18" tyres the load ranges are;
108 to 112 are passenger construction.
113 to 115 are passenger construction extra load.
116 to 118 are Light Truck 8 ply.
119 and greater are Light Truck 10 ply.

OJ.
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Old 14-01-20
Baki bakic Baki bakic is offline
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2 steel ,2 poluester,1 nylon=tread plies 2 polyester/sideway plies, lt 265 70 16,
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Old 14-01-20
dean dean is offline
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Quote:
Originally Posted by Baki bakic View Post
2 steel ,2 poluester,1 nylon=tread plies 2 polyester/sideway plies, lt 265 70 16,
Index load ?....3 numbers between 112 and about 120. It will have a letter after it indicating max. speed.
Whatever, based on your requirements I wouldn't stress, any tyre sold in Australia in any "reptuable" tyre shop will do.
For best performance stick with your current size, 265/70/16
Dean
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Quote:
Originally Posted by Baki bakic View Post
2 steel ,2 poluester,1 nylon=tread plies 2 polyester/sideway plies, lt 265 70 16,
Load Index number is after the 265/70-17 on the tyre sidewall.

OJ.
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MM4x4 Auto Mate, Serial No 1 .
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Old 14-01-20
Baki bakic Baki bakic is offline
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117/114 r
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