These lightweight 13mm Aluminum Ball-Race Rollers function superb durability and generally are designed with 520 ball bearings to provide smooth rotation. Furthermore, these rollers have actually less friction against the program walls and will be utilized for both front side and rear roller setups. This kind of variation utilizes parts which have a weight reduced amount of around 30% because of their shape and newly-bored holes. Additionally, this limited-edition set features a blue color finish.