It looks like we may be putting the Norton back on track to run V3 and V4 and I have a couple of tire questions. Are Avons available? I would need 18", probably 120 rear and maybe 100 or 110 front I know Contis are available in the size I need but I never raced the bike on radials. Is there a big difference between bias ply and radials? Who is the ContinentaI tire guy? We ran Metzlers last time we raced the bike so it's been a minute.