Ole Einar Bjorndalen has built his dream RV. It is half RV and half gym. But the gym has a big Swedish Rodby treadmill in the back with space for 2 cyclists, skate skier, two classic skiers or several runners.
The RV is 12 meters long (40 feet) and should be something every triathlete should buy
https://www.youtube.com/watch?v=_-QJhyT-N0A
The RV is 12 meters long (40 feet) and should be something every triathlete should buy
https://www.youtube.com/watch?v=_-QJhyT-N0A