Point taken - the rim width is a fixed quantity, whereas tyre tread depth will affect weight (do you mean 3-4lb, rather than kg, per 1mm of wear?). My context isn’t racing, but I’m coming at trackday’ing from a bike racing and occasional sprinting background. Also, have moved from 270-400bhp scoobs to a Mk1 1.6 and am keen to make the most of its limited power!
Right now I have R888s on some 5Zigen wheels, plus worn KU31s on some 5-spoke ‘Clark’ wheels. Looking to replace the latter with a good road + wet track tyre possibly on a lighter rim. Was thinking of Mk2 Sport Enkeis at around 6kg, or spending more to lose 1kg on your wheels, plus a road tyre that’s rated A for the wet like Pilotsport 3, Premiumcontact 5, Dunlop SP sport or (less likely for the track) Rainsport 3.
Thanks,
Andy