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Post by esmerelda on Jul 30, 2012 13:09:10 GMT
Just got new tyres fitted to our Safari. The ones one there were pretty cracked and one was 29 year old. Its basic weight from the is 18CWT - 950kg, so well laden I'm assuming 1300 ish? 1. I was assured ahead of purchase were weight rated about 950kg. However, I now see they're actually 690. This seems a bit close to the mark - any idea what they SHOULD be? They look the same as what came off. See photos below of new ones. 2. I had a run out on them about 50 miles and at 40 psi they seemed to run quite hot. Not too hot to touch, but hotter than car tyres get. The garage said just pump them up a bit more. Any idea how much, or is this a sign that they're a bit overloaded? Thanks, Jonathan
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margo
Junior Member
Posts: 30
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Post by margo on Jul 30, 2012 14:29:36 GMT
It looks like you have been sold tyres for an old short wheel base Series Land Rover with a Load Index of 95 so you are right on the recommended weight limit. Ideally a rating of 97 and above would have been better but these are becoming quite hard to find unless you seek out a modern equivalent size. Your ones are absolutely fine providing you keep an eye on the gross weight (1,380kg) particularly as you are adding weight during the restoration! I can't comment on whether you can run these tyres at the required 42psi but on a Land Rover they run at 30psi which is much lower than what you have and need for that matter.
Assuming your brakes and wheel bearings are operating correctly the heat generation is due to road resistance caused by the aggressive tread pattern on the tyres. This quite normal but these tyres will have quite a high wear rate on tarmac. Also they are not designed for high speeds and they are probably quite noisy as well.
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Post by esmerelda on Jul 31, 2012 8:40:46 GMT
Thanks Margo, I appreciate the response.
I'm going to take it to a weighbridge in the next week or so laden with all our kit to see how much it clocks in at.
We got the van with these knobblies and given we often pull it across festival fields, I felt these may help with lateral movement and braking so took the garage's advice and put the same ones on.
I generally knock along at about 50, occasionally up to 60 but never higher. 50 downhill and she can snake a little.
Cheers, J
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Post by markaveling on Sept 17, 2012 22:44:58 GMT
I have a 1968 13/2. Have recently fitted modern tyre too it, but not sure what tyre pressure to run at (weight 950Kg approx.).
anyone have any recomendations?
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Post by Brian M on Sept 19, 2012 19:45:58 GMT
For my 1978 14-2, which is a bit heavier than your 12-4 I run at 35 psi.
I have done so for 9 years now, and probably done over 10000 miles in that time.
The tyres do not get too warm, even after prolonged motorway running at 55-60 mph.
I arrived at the figure by trial and error, starting at 30psi which seemed too soft and resulted in some heat build up.
Hope this helps.
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Post by markaveling on Sept 28, 2012 20:33:48 GMT
Thanks, will give me a good starting point.
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