I've use a Garmin GPSMAP 276Cx on my bikes for about a year now going from using two different types of Garmin one for road and one for off road, garmin nav 4 and a Montana, switching to the Garmin GPSMAP 276Cx its big and heavy for a navigation unit not got touch screen to many features and buttons but I bloody love it.
so easy to just swap over to different bikes having same cradle on all bikes, 8gb memory to load maps routes waypoints it Supports Garmin TOPO Maps, HuntView Maps, BlueChart g2 HD Marine Charts & More its a All-terrain GPS Navigator thats so easy to zoom in and out, with already having the three power cradles from a garmin Montana it slots straight in, the battery last days without a charge
so easy to just swap over to different bikes having same cradle on all bikes, 8gb memory to load maps routes waypoints it Supports Garmin TOPO Maps, HuntView Maps, BlueChart g2 HD Marine Charts & More its a All-terrain GPS Navigator thats so easy to zoom in and out, with already having the three power cradles from a garmin Montana it slots straight in, the battery last days without a charge