I have fairly lightweight sports seats in there now.
I would rather not decrease any form of handling performance - as well as my daily driver , its my little " sporty " car too
Depends if i want to be sensible or not
A rough estimate : i have saved 15-20kg by changing the wheels on their own. However the tyres will be more geared towards performance rather than lowering the RR.
Reason why i was wondering about the weight reduction is that the " other " crxs , some of them are like 200kg lighter !