The problem with 16" is the lack of premium tyres in this size. You mostly get rough van-derived tyres, that are noisy and jittery.
In 17" you can get premium car-derived tyres, that stick better, ride better, but still have the required 103 load rating, see 17" tyre thread.
As for 18", you might be reducing some of the performance, they are harder for the engine to turn as they are heavier and wider (needs to be wider at 255 width in order to contain the similar air volume as 17" at 235 or 16" at 215. I read somewhere that adding 1 kg to rotating mass is equivalent to adding many kgs to overall mass, depending on the speed.
Last edited by Tig-uan; 24-06-2015 at 02:44 PM.
Multivan MY12 TSI350 Red. Previous: 2008 Tiguan 103Tdi. 2010 Tiguan 125TSi.
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