Just had another look at the tyres as i was thinking about period correctness earlier (procrastinating in other words) and i think youre right as are these tyres? I looked again, actually the front tyres is a Ground Control II S, the rear is a Ground Master S, and looking at the 1990 catalogue theyre listed as Ground Control S. So i think these ones are period correct? Would be interested to hear if yes/no as i dont know much about the different variations on Specialized tyres. CheersI'd like to see it with either period correct (for the right look) or modern tyres (for worry free riding). Tyres that are just a few years older than the bike seems to be the worst of both worlds, iykwim?