The swingarm has space enough to fit a 180/60 tire, and to fit this tire the manufacturers advise a 5 inches rim like a Paso. I have no checked but I think is necessary to add any whashers to separate the rear sprocket.
The 150/80 tire runs good but has any problems: to inflate it you need an inner tube, this tire is very thin and when you drive in twisty roads you feel the tire portion on the road is minimal and when you drive hard this portion dissapears suddenly, you need a 14 teeth front sprocket because this tire is very high and the 5th gear results very long.
To legalize this tire sizes you must go to your nearest ITV station and ask for it. If they say these tires are compatible you can fit them. If you need an engineering certificate you can call to Idiada company (
http://www.idiada.es). I think they have a subsidiary office in Vigo. I called them to legalize my XR supermotard and I had to send them a copy of technical card (ficha tecnica) and a desciption of the original tire sizes and new sizes. New sizes must to have a bigger speed code and loading code than original ones. After this you have TO PAY +/- 150 € and in few days you recieve a certificate. With it you go to the ITV and they write new sizes on your technical card (and PAY another time).
I'm sorry if this post is boring our Pasofriends from another countries

, and I'm sory because my english level is very bad, but I improve it in this forum enjoying with my Pasofriends.
DCT906 if I can help you, just to call me
P.d: I'm working in a17 wheels conversion, when I'll finished it I'll put the information and photos on the forum
