Spec Bearing Size C
The Spec bearing was developed to provide the best play and performance found in modern performance yoyos. Made of stainless steel, these bearings will hold up to anything you can throw at it.
The Center Trac ball bearing has a special shape to keep the strings in the middle of yoyo. Saves friction, makes yoyo spin longer and smoother.
Center Trac Bearing Size C
Spec: Standard ball bearing
Center Trac: Centers the string