We been playing with a Fuji Tandem this year and like it, but may "upgrade" next year as the upright seating position just seems to relaxed. Anyway, we've only had a few outings, but we pulled a Burley trailer with two kids and I really felt it in my legs. Now my wife is a great stoker, but I took a little ride with my Dad the other day - WOW! It was like we were going to fly, tons of power and felt like we could really go, climb, or pull whatever. Any ideas on riding with my wife, will she develop more power, or do I need to lighten up and go slower, or is this just how it is? I solo about 2-3 times a long (distance) as shes does, and average 4-5 mph more. The tandem is for fun, so not a big deal, but riding with the whole familly really works me, and we are thinking of trying the Hilly Hundred in Indiana (50 Hilly miles each day) next year on a tandem. So before we upgrade for the Hilly, I want to make sure we really like this tandem thing. Any thoughts?