I have two PS3's at the front and two Exaltos at the rear and one Exalto has a puncture. So not wanting to fork out for two new tyres to have a matching set all-round I am wondering about replacing the Exalto with a hole in it with a PS3 (as I can't find exaltos anywhere).
Will this be safe to do and it will it matter much about tread being lower on old exalto vs new PS3?