I have original tires on my show car as well, but expect to remove them even though they are in good shape. As far as concours competition is concerned, I feel that the issue of original tires might be overstated. My recollection is that there are only 2 points awarded for the tires. 1 point is deducted if the tires show wear, while 1 point is deducted for non-original tires (it's been a while since I looked at the rules last, so I may be wrong here). If the scoring is done this way, then good condition Yokahamas will earn 1 point while NCT's showing signs of aging or wear will also earn 1 point. My preference would be for the good condition Yokahamas since I think they ride better and might be considered somewhat safer (I drive my show car on occasion in order to keep everything mechanically sound). You don't have to score 200 to win concours competitions, you only have to score higher than everyone else. Knut