The Chaya Octo Propel is a high-quality outdoor roller skate wheel but has a cosmetic defect. The print on the wheel is wrong and therefore categorized as a B-grade wheel. The print shows 61mm wheel but the truth is that it´s a 59mm wheel and with a hardness of 78A the Octo Propel also not an indoor wheel as printed but a great outdoor wheel.The wrong print doesn´t affect the overall performance of the wheel which has the perfect size and hardness (78A) for outdoor cruising. This wheel will suit even rough asphalted roads. The highlight of this wheel is the added urethane lip that ensures snappy lateral movement as well as greater push in your strides.