Bearings

Radial ball scooter bearings are used in many applications throughout the street scooter, mini bike, ATV, dirt bike, and go kart industry. You will always find the right scooter bearing in our huge selection of quality bearings for scooters at Monster Scooter Parts.

Bearings for scooters are either shielded (ZZ or Z suffix) or sealed (2RS or RS suffix). The scooter bearings in the sizes shown in this section are commonly used in wheels, transmissions, gearboxes, and various other GY6/QMB139 engine components.

If you don't find the size or style of scooter bearing you need listed here, please send us an email or give us a call and we will be happy to special order your specific size.

A Helpful Guide to Bearing Standards

The series of numbers in front of the bearing name can provide much information about that specific type of bearing. Here is an example:6001ZZ
6 = Type Code
0 = Series
01 = Bore Size
ZZ = Suffix

Type Code Definitions:
1 - Self-aligning ball bearing
2 - Wide self-aligning ball bearing
3 - Double-row angular contact ball bearing
4 - Double-row ball bearing
5 - Thrust ball bearing
6 - Single-row deep groove ball bearing
7 - Single-row angular contact bearing
16 - Thin section single-row deep groove ball bearing
22 - Self-aligning roller bearing
23 - Wide self-aligning roller bearing

Series: (Identifies the lightness or heaviness of the bearing)
0 - Extra Light
1 - Extra Light Thrust
2 - Light
3 - Medium
4 - Heavy
7 - Not Sure
8 - Extra Thin Section
9 - Very Thin Section

Bore Sizes (in mm):
For most bearings, the bore size can be calculated by adding the 3rd and 4th digits together and multiplying the result by 5. However, there are a few exceptions to this rule, as follows:
00 = 10 mm
01 = 12 mm
02 = 15 mm
03 = 17 mm

Suffix Meanings:
Z - Single Shielded
ZZ - Double Shielded
RS - Single Sealed
2RS - Double Sealed
V - Single Non-contact Seal
VV - Double Non-contact Seal
DDU - Double Contact Seals
NR - Snap Ring and Groove
M - Brass Cage
C3 - This marking indicates a radial internal clearance greater than the standard clearance. C3 bearings are usually fitted to equipment where there are large temperature differences between the inner and outer casings, therefore, sufficient clearance is needed to avoid early bearing failure.