Maximum Speed. An average walking speed is somewhere around 3 miles per hour, but fast walkers and power walkers can often walk at speeds at or above 5 miles per hour. The speed at which you feel more comfortable running than walking is known as your break point, and a typical break point would be somewhere between 4 and 5 miles per hour.
Mini Skateboard Deck width: 7.0â³ with an average deck length of 28â. Mini decks are the best skateboards for beginners who are 6-8 years old, between 3â5â and 4â4â tall who wear size 4-6 shoes. Mid-size Skateboard Deck width: 7.3â+ with an average deck length of 29â. For skaters 9 to 12 years old between 4â5â and 5â2â tall who wear size 7-8 shoes.
The standard inline skates bearings have the designation 608. The 608 means that the bearings are from the 600 series, with a 8mm inner diameter (the width of the hole, i.e., internal bore). The 6 appears to be for the 6mm difference between the inner and outer radii (from the outside edge to the edge of the hole). 608 bearings are also the standard size for skateboard bearings. Quad skates use either type 608 (8mm internal bore) or type 627 (7mm internal bore).