What type of mount is required to mount a Garmin Nuvi 680 to the bike? I have an older unit that I would like to use on the bike from time to time. I have Murph's risers and I know I can get a ball mount, but based on what I see on the Nuvi mount I would need to have some sort of adaptor to make it useable.

How about this?:
http://www.touratech-usa.com/Store/PN-GRNV6H/Ram-handlebar-mount-Garmin-Nuvi-600-610-650-660-670-680

Remove the diamond base and stick it on a ball from Murph's?

Get you one of these from Murph, VERY well made and works great. You'll need to get some sorta adapter/mount specific to your GPS though.



http://www.murphskits.com/catalog/product_info.php?cPath=130_133&products_id=308

This is what I used to mount my Garmin to the Techmount.



Here's the cradle that will fit your 680, $12 at Amazon.

That's the open cradle I use for my 765T, works great IMO!
 

 

Thanks for the replies.

That's the open cradle I use for my 765T, works great IMO!
 

 

That's looks good ZG, I'll snap a pic of mine. I'm really liking this setup.