If you enjoyed reading this article, please click here to view it on Kropotkin's site, MotoGP Matters. ----------------- Jonathan Rea made history at the weekend by claiming a record setting fourth consecutive WorldSBK title. The Northern Irishman is at the peak of his powers but where does he rank in the all-time list? “Who's the greatest” has been a question asked in every sport over the years. Whether it's Muhammad Ali proclaiming himself the greatest, or Tiger Woods being anointed by the masses, a general consensus quickly forms about a pecking order. In football it quickly comes down to Pele or Maradonna, Ronaldo or Messi or another combination from a certain era. In tennis it comes down to dominance over a sustained period with one era blending into the next of Rod Laver to Bjorn Borg to Pete Sampras to Roger Federer. Motorcycle racing is similar in a lot of ways, with riders typically earning their titles in spurts of sustained excellence. Superbike racing is however a curious subset. With domestic series feeding into World championships and some of the brightest WorldSBK stars being offered MotoGP seats after only a couple of years, at the same as riders step across to Superbike racing from Grand Prix for only a handful of seasons at the end of their careers, it's a strange combination of fluidity and constant change. When you ask a Superbike fan who the greatest is, you certainly get more than your fair share of choice. Jonathan Rea (Four time WorldSBK champion, 68 wins and 131 podiums) Recency bias will place Rea at the top of the list of many fans, but a constant thorn in his side are the references to racing in an era of lesser competition and Rea having the best bike. In terms of the machinery the best riders almost always end up on the best bikes in any championship.