275's ??

[JustinS Lurker Find all posts View Profile Close JustinS]

Hard tyre covers are for doctors and those who tow horse floats for polo club meets.

Call me Dr. Seabiscuit then...

I guess you don't have a wife...

[JustinS Lurker Find all posts View Profile Close JustinS]

Because for ADR, speedos must never underread. So I guess manufacturers are a bit more cautious (or other reasons) and make speedos overread (i.e. 100km/h on the speedo is actually 95km/h on the GPS). A bigger tyre will therefore make the speedo read closer to the GPS reading.

Right, that makes sense. I have noticed that when on the highway.