For example say i take a 255/40/19 tire Vs. 255/35/19 tire would the first tire weigh more ?another example if we take two of the same cars one sitting on 235/40/19 Front/Rear and the 2nd car 255/40/19 Front/Rear will one car weigh less simply because of tires ?
Tire weight does not only depend on size, but also the the specific model and tire manufacturer. Difference in tire weight is so slim that it would not make a difference for an automobiles performance. To answer your question specifically, yes, different tire sizes could cause a difference in overall body weight of a vehicle, but it is so minute that it should never come in to effect a ride or performance issue. Most importantly, it is always best to place the intended tire size on your automobile. The automaker of your vehicle went to great lengths to engineer and design a specific sized wheel and tire for it's best ride and performance. Stay original equipment sized rims and tires if you wish it to drive the way the automaker intended.
