I am due to change tyres sortly on my = 85 European Spec.1915. Can anyone point me in the direction of valid information re = change fro 14" to 15" wheels. Since we can no longer buy 5 stud 14" alloys or = decent steels in the UK, I reckon I will be force to move to 15". This must = obviously affect gearing, consumption,etc. (yes we pay $5.40 a gallon here) so = would like some info before making the move.