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  Jaguar World Monthly Forum › XJ Saloons › XJ Saloons - XJ40's, X300 › tyre wear
(Moderators: optimus prime, a.pax, Matt, Phil, walko)
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tyre wear (Read 307 times)
yortonheath
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tyre wear
20.01.2010 at 22:13:08  
hmm.
just  noticed Big bad wear on the inner wall of my not too old tyres. I am hoping that it is  camber out of alignment, but it  could be ...what? 
anyone any experience of this.?
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XJ40 3.2 1992 BRG&&1968 TRIUMPH HERALD DHC&&1943 BSA sit up and Beg, Bicycle.&&1950s Triang Ford Zodiac Pedal Car.&&
 
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covkid
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Re: tyre wear
Reply #1 - 21.01.2010 at 00:48:49  
yortonheath wrote on 20.01.2010 at 22:13:08:
hmm.
just  noticed Big bad wear on the inner wall of my not too old tyres. I am hoping that it is  camber out of alignment, but it  could be ...what? 
anyone any experience of this.?


Front tyres = too little Toe-in

Rear tyres = incorrect camber ?
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Chris Dixon
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Re: tyre wear
Reply #2 - 21.01.2010 at 22:02:26  
Not sure if X300s generally suffer from this but on the XJR with fat tyres this is a common problem, usually accompanied by tramlining. I guess an X300 with sports suspension will probably suffer more than one with the standard setup. One of the more technically minded XJR guys has had polybushes made for the upper wishbone mounts (see http://www.xjr6.co.uk/index.php?option=com_jfusion&Itemid=53) but the starting point as ever is checking the tracking or having a 4 wheel alignment done. Regards, Chris.
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95 XJR Manual
86 XJ-SC 3.6 Manual
 
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yortonheath
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Nr. Shrewsbury, Shropshire
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Re: tyre wear
Reply #3 - 21.01.2010 at 22:02:43  
thats what I thought. Off to the alignment man.....
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XJ40 3.2 1992 BRG&&1968 TRIUMPH HERALD DHC&&1943 BSA sit up and Beg, Bicycle.&&1950s Triang Ford Zodiac Pedal Car.&&
 
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Alpine
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Re: tyre wear
Reply #4 - 22.01.2010 at 13:44:57  
could be worn front suspension bushes, that was the problem with my x-300
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Phil
'97 X300 3.2 Sport
'92 Porsche 944 S2
 
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Leo_Denmark
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Middelfart Denmark.
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Re: tyre wear
Reply #5 - 23.01.2010 at 17:55:49  
covkid wrote on 21.01.2010 at 00:48:49:
yortonheath wrote on 20.01.2010 at 22:13:08:
hmm.
just  noticed Big bad wear on the inner wall of my not too old tyres. I am hoping that it is  camber out of alignment, but it  could be ...what? 
anyone any experience of this.?


Front tyres = too little Toe-in

Rear tyres = incorrect camber ?


I have had a rear tire puncture due to wear next to the thread on the inside of the rear tyre. It was on a journey through Europe with 4 persons and luggage = full load and a bit more.  Cheesy

My guess was that the reason was too low tyre pressure due to a very slow leak. The other rear tyre had less, but similar wear and also slightly low pressure. We did the remaining 6-700 km on the (as always) too old and not really good sparetyre, keeping speed down, as the car was still heavy... Shocked

My car has SLS, but it does not keep the rear end up when the car is loaded above the rated max load, so camber goes 'bad'.  Sad
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Leo Jensen, Denmark XJ 40 3.2 1992 - Citroën 2CV 1975
 
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XJ40S
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Sheffield
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Re: tyre wear
Reply #6 - 25.01.2010 at 13:02:18  
Almost certainly a combination of camber and toe out. Both camber and toe out increase as suspension / steering wears. As suspension bushes wear this increases the camber. This movement out of the wheels due to worn bushes, causes the toe out to increase (as steering rack is behind wheels).
I had sudden inside wear on front wheels of my 88 3.6. Suspension bushes were in good condition but there was neary 5 mm toe out. What had moved I don't know but I had struck two potholes in the previous 3 months and it was probably one or both of those that caused the toe out.
Cheers
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1993 3.2 xj6
 
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