Hi,
Originally Posted by
BlazingPedals
Cruzbike maintains that they can add significant extra power by using the upper body; but IMNSHO all they're doing is using extra energy to counteract the pedal steer that wouldn't exist if the entire drive train wasn't mounted on a swivel. So, once again, they're using more power but not putting any of it on the road.
Pedal steer isn't an issue for most experienced MBB riders (as evidence by the fact we can ride with no hands).
Cruzbike's most controversial claim is that because of the format, riders can output more power for sustained periods of time. I'm pretty much undecided on this claim although:
1) If you look at cross country skiing as an example, people can put out more power using their arms and legs than just their legs, for extended periods of time).
2) Maria's exploits on RAAM and climbing are quite impressive (whether this is due to just the stiff Vendetta drive train and Maria's athletic ability alone or because of some sustained MBB benefit, I don't know).
The Cruzbike claim that it can put out more power for a short period of time is something I do believe (as compared to some recumbents). On my LWB bike, I can only brace myself somewhat with the seat if I really want to pound on the pedals. With my Cruzbike, I can "plank" by pushing on the handlebars and lift my butt out of the seat. I can only do this for short periods of time, but I can double my speed up some short but steep hills (I then fall over at the top of the hill due to exhaustion).
Cheers,
Charles