How much does the stock tire weigh?
Been looking at alternative tire sizes for the rear of my 14 RS.
Found weights vary widely.
Considering The below lightweight car tire which is same height but a little narrower.
Comments welcome

Summer
Dunlop Direzza DZ101 - 205/55R15

The Dunlop Direzza DZ101 is a summer extreme performance tire made for compact sports cars. It is designed to offer superior cornering and grip potential, while giving the driver a smooth feel. The Direzza DZ101 performs well even at high speeds. As with all summer tires, it is not meant to be driven in icy or snowy conditions. The Dunlop 205/55R15 Direzza DZ101 has a diameter of 23.9" and a width of 8.4", it is mounted on a 15" rim with 874 revolutions per mile. Direzza DZ101 205/55R15 tires weigh 19 lbs, have a max load of 1235 lbs, have a maximum PSI of 51 psi, have a tread depth of 10/32" and should be used with a rim width of 5.5-7.5".
See all Direzza DZ101 tire sizes →


Dunlop Direzza DZ101 205/55R15 Tire Specs

Size Diameter Width Tread Depth Tread Width Rim Range Load Range Max Load Max psi Weight Revs/Mile
205/55R15 23.9" 8.4" 10/32" 7.2" 5.5-7.5" SL 1235 lbs 51 psi 19 lbs 874