Tony Kart Racer 401 RR

History

Tony Kart, the founding marque of Italy's OTK Kart Group (with Kosmic, Exprit and EOS as sister brands), has defined chassis orthodoxy in international karting for three decades. The Racer 401 line — 401S, 401R, and current 401 RR — represents the formula at its peak: 30/32 mm chromoly tubes welded in Prevalle, OTK's own MXC magnesium wheels, self-adjusting geometry philosophy and component ecosystem (brakes, hubs, stub axles) machined in-house to tolerances rivals benchmark against.

The factory Racing Team's record spans the disciplines that matter: FIA Karting World Championships in OK and OKJ (Ardigò's KZ dynasty before them, the modern era's junior stars since), European titles yearly, and victory lists at the WSK series — karting's professional circuit — that read like OTK internal memos. Most F1 grids of the past twenty years learned their craft on OTK products, whichever sticker the customer team ran.

For buyers the 401 RR market is karting's most liquid: new-homologation cycles push barely-used chassis out of professional teams seasonally, spares are stocked worldwide, and the model's setup knowledge is effectively public domain — every serious tuner speaks OTK.

Palmarès

FIA Karting World Championship titles in OK/OKJ and KZ classes across the 401 era (Ardigò's KZ world crowns the anchors), European Championships annually, WSK Super Master and Euro Series title streaks, and the champions-of-tomorrow record: multiple current F1 and F2 drivers' final karting titles came on OTK 401-family chassis.