As far as I know is the 18"range for tonti and older bikes. Not the 160 wide tyre of the daytona.
A complete wheel with tyre and disk rear is 13kg for the daytona.
In the old days, PVM made 17"three spoke wheels that were the must haves. I once bought a bike with these wheels, the rear was 18 kg complete.
Later they went to forged alu, that is much lighter. I have those in 17*5.5 in my daytona.
The front is 1.5 kg lighter that the same size daytona stock wheel. ANd that is incredible to notice. Since then it's so much easier to turn at speed. Worth more than any other tuning
www.pvm.de And on the deas mototec site are some prices and pictures too.