Mine was a 17.5" and yours is bigger so that puts it at 19"?
If you ever want to sell...... (if I ever have any cash!)
When I measure it center to center its 19 inches (48cm).
I'm not sure about selling it. Like I wrote it's to big for me (I'm 1.73 m so that's around 5 feet 7 in your sizes) but on the road it's not so bad.
But if you make me an offer I can't refuse who knows..
It's not as nimble as my SM800 but that a totally different bike, more like a toy. The Marin for me feels more like a street racer.
'98? American Eagle Lake Tahoe
'91 Cannondale SM800 (Beast of the East)
'93 Marin Bear Valley SE
'04 Yamaha XT660R