You don't need to worry about the build quality of the TireFlip 180°. The frame is made of oval steel with dimensions of 80×50 millimeters and a thickness of 2.5 millimeters. The edges are equipped with bearings, allowing the wheel to turn safely.
The design with the gap in the middle allows the legs to move freely and without the risk of slipping, enhancing the level of safe exercise. If you want to bolt it to the ground, there are appropriate holes in the bases.