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Good points. It bugs me about zooming out, I often use that feature to determine how far it is to the next town and what size/ammeneties it might have. The garmin will display all the roads, allow me to move the map around, and will then show the amenities on the map.
My use is far beyond most people, so I can't bash it overall, their are a lot of things I like about it (hence giving it a go) but I think there are some very fundamental issues, that would be simple to fix, yet wahoo haven't noticed.
skinny-
Yes, I can see the zooming out to investigate places ahead is important - In fact on a smaller scale, thinking about my ride to Bristol on Saturday night, this is something I had to pull out my phone for when looking to see if I was getting to anywhere big enough to have an open garage. And that is something Garmins can actually do quite easily.
I guess it's because Wahoo store maps in a totally different & simpler way.
Handlebar phone mount and Wahoo alongside? Best of both worlds?
But realistically given your past achievements, sticking with a Garmin probably best option. What's made you consider not using a garmin? Just the unreliability?
ad441
Based on the last year of moderately long route (but not TCR level) navigation, I definitely feel like I'd be happier using a Wahoo on TCR than a garmin. I've certainly seen far more disastrous things happen with Garmins (ask @coldharbour).
But it totally depends how much re-routing you need to do along the way. If you have your route totally pre-planned and can have a stack of back up GPX files on a phone you could bluetooth to a Wahoo that seems quite reliable. But if you're dealing with a road closure in the middle of the night and there's no data connection I could see that you might be in trouble. Though I guess in this instance google maps saved offline as back up would allow you to manually find a route back on track.
I don't know why Wahoo don't actively work with people doing TCR style rides as a means of then marketing them to audax type riders - I've always felt that if something works for you ultra long distance people then it proves it's suitable for 400-600km type rides. I suppose it's not a huge market compared to the sports one, but any audax facebook group is full of people moaning about garmins and contemplating buying a wahoo.