If your joints are a concern, or you're just getting started, why not try a recumbent bike? They suit beginners, seniors, or anyone who doesn't want to put much pressure or weight on their knees ...
A Californian company has released a bolt-on kit that turns bikes like the Zero SR/S and SR/F into whacky-looking trikes, with recumbent seating and double wishbone front suspension. The quirky little ...