Not sure tbh as have not had the map page up while I’ve been riding off road. Supposed to be fine for following a preloaded trail. Will check out. The 520 is not really a great navigation device off road. I suspect you might be better looking at the 820 or 1000 models. Here are a few pros and cons of Elemnt v Garmin 820 taken from a thread on DCR. Reflects my recent experience of Garmin (800 then 520). Battery life on the 520 was less than I would have ideally wanted. I am impressed by the Elemnts connectivity to Strava and Ride with GPS. You can create a route in either application and it is automatically uploaded to the unit. This contrasts with the pain of using Basecamp and exporting tracks to a Garmin which could not be relied upon at all.
Pros:
• Elemnt is much cheaper.
• Elemnt screen is clearer.
• Elemnt battery life is longer (I’ve had 13hrs out of mine and thats following a route with sensors, Di2 sensor and a phone attached)
• Elemnt does fit in a Garmin mount (I’ve got mine in a standard Garmin one due to having flat aero bars)
• Elemnt Turn-by-turn works (a lot of people complain Garmins doesn’t)
• Elemnt has visual LEDS which you can program for HR, Power or Speed. Also has visual LED’s for turns.
• Elemnt allows you to have 6 data fields on the map page. Garmin only 2.
• Elemnt-you can zoom in and out on the magnification of data so can have less or more data fields per page.
• Full whole world mapping.
• Wahoo constantly fix any little bugs and make improvements to the software (theres been 3 updates in the last month alone). Garmin not to much.
Cons:
• Not a colour screen. (assuming you want colour)
• Not a touchscreen (assuming you want touchscreen. My last gps had it but I’m not missing it on the Wahoo)
• Cant input a Postcode to navigate too. (Though in reality, i had this on my last gps and used it once in 3 years. Generally you either know where you’re going or you’re following a pre-planned route anyway. But knowing Wahoo it wouldn’t surprise me if they introduce this at some point)
Not much else i can think of.
Garmin 820:
Pros.
• Colour screen (assuming you want it)
• Touchscreen (assuming you want it)
• Ability to put in a postcode to navigate to
Cons:
• No doubt it will be buggy and take ages to get fixed.
• Turn by turn is unreliable.
• Mapping probably won’t be the whole world like the Elemnt.
• Battery will probably be less than the Elemnt.
• No visual LED’s.
• Have to scroll between mapping page and data page to see more than 2 data fields on the map page.
• Expensive and unlikely to drop in price for a while.