Originally Posted by Steve B.

The GPS units are typically easier to read then smaller non GPS. The screens are usually larger for one thing and most of them let you configure how many metrics of data on a non map screen. The Wahoo units let you zoom in on the data screen and the info can get quite large.

Maps are a different story and in general if wanting to use and read maps, the larger the unit, the better. I’m 62, use 1.75 reading glasses, but can read the color map on my Garmin 1000 with no glasses.

The Bolt, as BTW is roughly 3”x2”