I am 65 years old, big guy 6-3 275 lbs. I recently had 2 total knee replacements. I ride a stationary recumbent bike for rehab and exercise. I used to ride a conventional bike but I have found that since my knee replacements, getting on and off the bike is an adventure. So much so I have pretty much given it up, I'm thinking seriously about getting a trike. Specifically looking at a Rover. Any comments or advice would be greatly appreciated. Oh, the area I will be riding is relatively flat, some paving, some gravel bike trails.