I am running a 110 and its pretty darn wide on a 19' front wheel on the Amen.
I think that is as wide as you can go on stock width.
http://i287.photobucket.com/albums/ll150/jpswino2/One%20Day%20Amen/100_2138.jpg
http://i287.photobucket.com/albums/ll150/jpswino2/One%20Day%20Amen/cbx022.jpg
http://i287.photobucket.com/albums/ll150/jpswino2/One%20Day%20Amen/Picture005-1.jpg

In order to run a 120, you need a real wide rim.
I have a 3.5" wide rim on the front of the CBX so I could use a 120. But it is a 21".
http://i287.photobucket.com/albums/ll150/jpswino2/cbx/IMG00067.jpg
http://i287.photobucket.com/albums/ll150/jpswino2/cbx/IMG00035.jpg

BTW - Thats a 19" fender that fits to snugly on the wide 21" wheel. Just how I like it.

"In the wind, with my mind on my money and my money on my mind"...now I just gotta get some.

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Last Edited By: jpswino 03/25/09 3:36 AM. Edited 1 times.