- Everlast Standard Duo Exercise Wheel

This double-wheel has a wider rolling surface, which makes it a lot less prone to tip than single-wheel models. The bar is hollow, but very strong, and the wheel hubs and spokes are made of a strong plastic, ... so the product is very light. (Suggestion: If you wanted an even more stable design, you could slide one wheel off and put something like a 3/4-inch inner-diameter spacer washer or two between the two wheels.) Overall, a fine product, at a very good price.