Re: 18' or 19"on my e90 320i
Don't just compare sizes this way. Too simplistic.
Compare against:
~ wheel weight (forged 19"s may be lighter than cast 18"s)
~ tyre weight (your 19"s tyre model might be same weight as your 18"s tyres)
~ distribution of weight on your wheels - even or heavy lipped? An evenly distributed monoblock 19" wheel might face lesser rolling inertia than an 18" wheel with heavy barrel/lip
Don't just compare sizes this way. Too simplistic.
Compare against:
~ wheel weight (forged 19"s may be lighter than cast 18"s)
~ tyre weight (your 19"s tyre model might be same weight as your 18"s tyres)
~ distribution of weight on your wheels - even or heavy lipped? An evenly distributed monoblock 19" wheel might face lesser rolling inertia than an 18" wheel with heavy barrel/lip