Type-X economy (XSG, XSO) ball bearings are specially made for competition models. They are all ready to race but still require maintenance.

XSG - 1/8 nitro off road.
XSO - 1/12 ~ 1/8 on road, 1/10 electric off road.

Low profile XSG ball bearings such as models R1212, 6702 etc... will not feel smooth when new due to the amount of grease inside but will smooth out once the bearings have been used.

SPECIFICATIONS

Type : XSO

Ring Material : Bearing steel

ABEC Grade : 3

Balls : Grade 5 steel balls

Cage : Stainless steel 304

Shield Type : 2 x red rubber shields

Lubrication : Oil

Includes 4pcs of ball bearings per pack, using aftermarket parts is always at your own risk.