Trisk
WE have never gone faster than 49. You don't have to go that fast.
but you CAN...
I have heard of others going much faster. and I think it's reckless.
The point is, YOU CAN.
and you can easily cruise at 20mph when a single cannot

about him pushing hard while you not.
we do this.
Specifically on hills, when he starts getting tired, I can kind of give him a rest and "supercharge" for a bit.. then he takes over again.
Tandems are great this way.
or you can BOTH give your all for 10 strokes and end up way ahead of everyone.