I started swimming, last November, after being sidelined with a running injury. Two seemingly nice pool ladies suggested I get a bike and ride with them once the weather improved. My husband decided that was a good idea and ordered a bike for me on Valentine's Day. I've been playing with the bike, pedals, etc. since it arrived in April.
Today's ride was 52 miles with an avg speed of 15+ mph. Max was 31 mph and left me wanting more.
I couldn't have done it without all the good advice generously given here.