You've hit on two of the four biggest differences - the other two being that the 550 speaks the street names for the upcoming turns and comes with the automotive mount and power cable (as well as an AC adapter, but many never use that anyway).
The car cradle and power cable will cost you about $100 if you want to use it in the car without pulling the cradle off your bike.
You can use the M C mount between a M C and car and do not need a second mount.
I used the MC cradle, had a suction cup mount, made a power cord to plug into the cigarette lighter and bought a cassette adapter to get the MP3 and GPS prompts through the truck speakers. If you don't have a cassette player in the vehicle you could use a FM modulator. Note the inline connector on the power supply. Makes for a quick swap between bike and truck. On the bike
Garmin is discontinuing the 450 model and replacing with a 660 model. You might wait a few weeks and find the 450 heavily discounted, as vendors are going to try and sell off their stock.
I agree with John. Unless you can find a 450 at a blowout price, I would wait for the 660. The 660 looks like a real nice unit, and less cost than a 550, with a bigger display in smaller size case.
My Zumo is a little over 2 years old, worked fine until Saturday , rode 12 miles to town and it seemed to be working fine but after a couple hours parked in town when I left to go home Zumo did not turn on, tried to turn it on manually but no luck, after getting home I tried moving it to other...
Hi I have a new to me 2015 Goldwing that I installed a new CB radio. It was working OK for a few hundred miles after the install but now have a problem. The problem is that after a while of riding I get a message on the screen that shows CB ERROR. It goes away and goes back to working after I...
I have a 2016 GL and I'm going to order a 595LM but I'd like to have it near the windshield up near the dash. Has anyone done this and how did you go about it?
I realize that many here are not using Route Planning software to pre-plan multiple Routes and save to your GPS. For most daily riding we simply punch in a destination and follow the directions as your GPS calculates. If your objective is to get from Point A to Point B as quickly as possible...
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Winger Dan · updated 
