>> What I did was to take the manufacturer's recommended tyre pressure for my old standard
>> 91 rated tyres and read off the load capacity in kg. Next I went to
>> the XL table and read off the required pressure to achieve the same load index
>> for my new 94 rated tyres. The difference was only 0.1 bar increase. I assume
>> this means that I am not utilising the (unneeded) extra load capacity but neither am
>> I underinflating the tyre to below the manufacurers recommended load capacity.
>>
I used the tables on Pistonheads too, and did the same comparison as you. The conclusion I came to is that really the tyre pressures on the CrossClimates should be increased (in your example by 0.1 bar) so the load capacity matches the non-XL.
However, as you point out, the difference is small, and is probably well within the margins of error of tyre pressure gauges and normal tyre pressure variations over time etc. So neither here nor there in everyday use.
The extra load capacity of XL tyres only comes into play at high pressures - XL tyres are constructed to wthstand higher pressures and, at those higher pressures, can carry more load.
Last edited by: Bill Payer on Thu 13 Apr 17 at 23:29
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