Okay peoples starting to look as new tyres, got 22k on the clock and two of the kumho's are close and the other the would have another 5k left in them. not gunna muck around and get them changed soon. Was looking at some other site so people have gone different sizes/brands etc. I was worried about the size of the spare and the difference in size in the event of a flat. Used a couple of those online tyre size calculators and was quite surprised with the outcome.
Factory size on the car 265 55 r20, size I'm looking at 275 55 r20, spare 245 65 r18. Based on the calculator the spare and the new tyre I'm looking at are closer in size than the factory supplied.
Overall diameter Factory 752.2mm, new 786.8mm, spare 801.mm
Difference between factory and spare 49.3mm, difference between new and spare 14.7mm
So little to worry about in the difference in the new size I'm looking at.
Looking at Pirelli Scorpion ATR 275 55 r20
Factory size on the car 265 55 r20, size I'm looking at 275 55 r20, spare 245 65 r18. Based on the calculator the spare and the new tyre I'm looking at are closer in size than the factory supplied.
Overall diameter Factory 752.2mm, new 786.8mm, spare 801.mm
Difference between factory and spare 49.3mm, difference between new and spare 14.7mm
So little to worry about in the difference in the new size I'm looking at.
Looking at Pirelli Scorpion ATR 275 55 r20