225/35r19 on 19x8.5 rims fit 05 jetta?

The best thing you can do is ask the company that you are planning to buy the tires and wheels from. If you want to know what type of Tires you can customize to you car vs OEM recommendations for your make and model, then you can visit: https://www.tirerack.com/tires/SelectTireSize.jsp? But is better to search by Make and Model first then choose the rim size. Also remember there are many factors you need to take in consideration such as the WHEELS, the suspension you have (if is aftermarket or not), big brakes or not, spacers, offset, how low you want your car, etc. You need to do your research first. For your car (assuming you have a 2005 VW Jetta GLI - you didn't specify) here is a list of compatible tires: Tire Search Results (tirerack.com)