07-05-2020, 11:50 AM
I have always understood that 28mph in top gear was to be avoided at all costs; this advice was passed on to me by my father, a keen motorist and qualified mechanical engineer. I have never queried it, but have often wondered whether that speed related to 4.00x17 tyres and a 5.25 axle ratio, or 3.50x19 and 4.9 ratio!