The wife and I have had the Rover Tandem for a year now. With a few minor modifications that we've done, we love it in every way except one. It's just the nature of the beast: the two of us do have different preferred cadences and there's no changing that, it seems. I prefer a faster one; she, a slower. When I try to pedal at hers, I feel strained, trying to push harder at the lower foot speed. When she tries to pedal at mine, she says she can hardly keep her feet on the pedals, they're spinning around so fast. I try to set a compromise cadence in the middle, put it's still not real good for either one of us.
Now the overall gear range seems good for us. In gear one we can get up just about any hill we've found; in gear eight, we can run along at as fast a speed as we ever want to go. In between low and high, there's all the differenciation we need. The only issue is setting up the trike so we can both contribute optimum pedal power throughout the gear range, each pedaling at his/her most comfortable cadence. How do I best and least expensively do that?
I have thought the best thing might be to install a different size chainring for the stoker. (I've read about different length pedals for the stoker, but that doesn't seem as reasoned a solution.) The current, factory setup is this:
34 teeth -- front chainring
34 teeth -- outer rear chainring (going back to hub)
30 teeth -- inner rear chainrign (going forward to front crankset)
The source of all our woes may be the two different size chainrings on the rear crankset, forcing her pedals to make more revolutions per unit of distance than do mine. But how can I best remedy this? We have the IPS hub on the rear, so it seems changing out chainrings may not be as simple a task. Can someone help with this? Thanks so much.