It's based on Tour de France wins between 1986 (LeMond being beginning of a more modern era of EPO abuse) and 2010 (Team Sky launched). Of those winners over 24 years, 75% of the wins have been from a rider exposed for doping. Sure, maybe not in Tour de France, but their career surrounding the win, so we assume doping. i.e. you assume Pantani doped for Tour de France even though not exposed during it. I think that is what OP was using to calculate 25% never get exposed, hence 75% over 24 years have been.The Hitch said:Which is false. A) riis and lance were exposed after 10 years. B) landis, ullrich, Pantani and contador represent less than 10% of all tdf winners, definitely not 75%.samhocking said:I'm saying 75% of Tour de France winners have been exposed for winning it through doping in 10 years on average.