because according to a new article on buying second hand performance bikes from http://www.bikepoint.com.au/portal/...D__5760/ArticleID__120234/DesktopDefault.aspx I'm getting less than a third of the tyre life I should be. QUOTE Ownership By nature, performance bikes can be expensive to run. Tyres and insurance are where they will eat considerably more money than most. For example, a hard-used litre bike can comfortably eat a set of rubber in 30000km, at $500-plus a pop. Of course a more restrained throttle hand will reduce this, but it also makes no sense to have anything other than the most grippy (and therefore quickest to wear) tyres on a sports machine, if you ever intend to explore its potential.