[pakofa]

I probably won't go with the largest due to the mileage drop, I am just curious.

 

[chittychittybangbang]

Way too may variables. I've seen 19" wheels on a jetta but I don't know the specific dimensions. If you stick with an oem 5x100 VW wheel, you should be able to fit most 18". But go too wide/tall on the tire and you'll get fender rubbing, possibly rubbing against the fuel tank neck, etc.

Also, check out this tire/wheel size calculator, it also shows differences in clearance.

http://www.venommotorsports.com/library/tirewheelcalculator.asp

 

[pakofa]

Thanks, I really think larger wheels look better than the stock 15" wheels. I'd like to get some rims just for looks.

 

[dieselpas]

You could keep the lighter 15" wheels to keep weight down and go with stiffer shocks. It would give you better handling while keeping mileage up. I don't think most people would even know that you had rims unless they were chrome blingers.

 

[vw709]

I don't know how people put on 19" wheels and not have them dented and bent in 1 week. Outside of Cali, I always see potholes everywhere.