A few comments on this one:<br /><br />Car tyres = 2 bar<br />Bike tyres = 8 bar...<br /><br />So thats 4 times tougher..<br /><br />BUT<br /><br />Car tyres = max 240 kph (I'd guess if you got "lekker" mags you got "lekker" tyres)<br /><br />Bike tyres = max 120 kph <br /><br />So thats half as tough...<br /><br />Where to next...<br /><br />Ahh, how much is a gearbox for a larny car vs a top end Campag or Dura Ace drive train. I can't think of many cars that would cost R16 000 for a gearbox (not including labour)... Well, I can, but they are all made in Italy and a few places in Germany....<br /><br />I think bike parts have to be likened to parts for a true sports car rather than a normal car. Tyres at 8 bars, components as light as possible etc. If one looks at an el-cheapo bike and its parts you're looking at R40-R50 for tyres which last for thousands of km's, albeit at much lower pressures than racing tyres.