The use of mud tyres

I reckon the traction on the road of tyres like the JT2 isn't as bad as what people make out. Its not going to spin out of control or spear off the next corner if it rains. They do have less traction but nothing horrific though they are vague compared to a radial when cornering and braking. I've run these tyres for a lot of years now in different sizes when used as a daily driver, in the rough and tumble and also for touring. I still think that they're a great tyre and the ultimate "All terrain" as such (but not in the conventional use of the term). The noise is significant from them also.

The thing that stopped me from running them as a daily driver (like you can with muddies) is they flat spot after parking. How much they flat spot depends on the load, the temperature they came in at, the pressure and how long you were stopped for and if they're 10.5 wide or 11.5 wide. 10.5 wides are a lot worse for flat spotting. Actually, I don't think they do anything better than the 11.5. The flat spots can take a lot of time to come out of the tyres depending, up to quite a few km's while your 4wd shakes itself. This trait is apparently something that all/most bias ply tyres do.

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Originally Posted by Slunnie

I........This trait is apparently something that all/most bias ply tyres do.

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That is an interesting comment - I have used bias ply tyres on and off for over fifty years and have very rarely encountered this effect (for example, I have only changed from crossplies on the 2a two years ago, and never saw this effect on it). In my experience it is dependent more on the rubber composition than the tyre construction (and your remark may well apply to many of the relatively rare bias ply tyres sold today) and temperature. I seem to remember reading many years ago that the effect first appeared with wartime use of almost pure synthetic rubber in cold climates, and disappeared when better rubber compositions became available again after the war.

John

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Originally Posted by JDNSW

That is an interesting comment - I have used bias ply tyres on and off for over fifty years and have very rarely encountered this effect (for example, I have only changed from crossplies on the 2a two years ago, and never saw this effect on it). In my experience it is dependent more on the rubber composition than the tyre construction (and your remark may well apply to many of the relatively rare bias ply tyres sold today) and temperature. I seem to remember reading many years ago that the effect first appeared with wartime use of almost pure synthetic rubber in cold climates, and disappeared when better rubber compositions became available again after the war.

John

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Maybe the temperature makes a difference.
I ran crossply retreads on the Series III for 23 years and often noticed the flat spot when I first drove off.

I think it happened more in the winter. I was living in Yass at the time- same temperatures as Canberra. I also think it needed a couple of days for the effect to be really noticeable.

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Originally Posted by vnx205

Maybe the temperature makes a difference.
I ran crossply retreads on the Series III for 23 years and often noticed the flat spot when I first drove off.

I think it happened more in the winter. I was living in Yass at the time- same temperatures as Canberra. I also think it needed a couple of days for the effect to be really noticeable.

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I've never lived in a place that cold..........

John