Here are the masses of the complete wheels that can be mounted on the Omega. I would like to know how much mass you have to accelerate – especially the 18″ wide tyre fraction. Winter tyres on steel rim 205/65 R15 to 6.5 J x 15 ET 33 with a Goodyear Ultra Grip 8 weighs 18.5 kg summer tyres on the Intra rim from the Design Edition equipment 235/45 R17 to 7.5 J x 17 ET39 with a Goodyear Eagle F1 Asymmetric 2 weighs 22.0 kg