faffi Posted January 6, 2011 Report Share Posted January 6, 2011 Not many race tracks have stayed the same over long periods. And even those that retains the same layout will not be the same; track surface will have changed for better or worse, depending on maintenance. Riders will improve or regress in perfomance, both on day-to-day basis as well as over time. Also, weather will also vary from one year to another, further making totally fair comparisons difficult - if not to say impossible. However, I'm still going to look at two decades of lap time development around two race tracks; Phillip Island in Australia and Isle of Man road circuit. PI Pole time in 1989: 1:34.990 (500cc) Pole time in 1999: 1:32.319 (500cc) Pole time in 2003: 1:30.068 (990cc) Pole time in 2010: 1:30.107 (800cc) Absolute record in 2008: 1:28.665 (800cc) IoM Senior TT Avg speed record in 1989: 121.34mph (750cc) Avg speed record in 1992: 123.61mph (750cc) Avg speed record in 1999: 124.45mph (1000cc from now on) Avg speed record in 2007: 130.35mph Avg speed record in 2009: 131.40mph I doubt many will claim that the bikes - from power to driveability to suspension to brakes and more - haven't improved leaps and bounds since 1989. So how much of the drop in lap times do we estimate comes from better bikes and how much is down to the tyres? Quote Link to comment Share on other sites More sharing options...
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