Rollerball / Akrowheels Simulator
This was a really easy project. The rollers on the right were made by placing a shot put on top of a triple wheel dolly coaster. The coaster is available at Menards for under $8 each. I already had the 6 and 8 pound shot put. The 8 pound is extremely stable and the 6 pound is stable enough. (I just ran out to the car and got the 16 pound shot put. It fits PERFECT.) I think I paid under $10 for them. I originally thought I'd need to secure them to the coaster, however, they are plenty stable as is. By not securing them, they are also available for other tasks. It is possible to use the coasters without the shot put, but the shot put makes it easier to roll and a bit more stable.
The wheel on the right was made with an ab roller. I just moved the wheels around. I got it at the Goodwill for a couple bucks. I have two made like this but one is at work. A dumbbell with a plate or two on it will also work.
Both devices work fine. I like the shot put design a bit better, but there is very little difference.
Training ideas can be found here.