I dont think I would go any further than 19's...the ride will be pretty stiff, and and if you do go bigger, the risk of braking something gets higher, bigger wheels=thinner tires
in other-words you will easily damage your wheelsby rolling over a pothole
http://myfastgti.com/vw/vw_gti_rims_and_tires/what_is_the_best_size_of_wheel_for_my_gti-t533.0.html
in other-words you will easily damage your wheelsby rolling over a pothole
http://myfastgti.com/vw/vw_gti_rims_and_tires/what_is_the_best_size_of_wheel_for_my_gti-t533.0.html