Joined: Jul 2007
Posts: 8,603
Likes: 3,532
From: South shore, L.I., NY
Bikes: Trek Emonda SL7, Cannondale Topstone, Miyata City Liner, Specialized Chisel, Specialized Epic Evo
I have 2 map sets on my 810 and have navigated multiple times on courses out to 40 miles, no issues.