Inline Skate Bearings

Guide To Buying Skate Bearings
Standard Skate Bearing Sizes
Small Bearings - Dimensions

608 Bearings
Inside Diameter - 8 millimeters
Outside Diameter - 22 millimeters
Width (unsealed) - 7 millimeters
Width (two shields) - 7 Millimeters
Typical Use - Commonly used for inline skate wheels, scooter wheels, and skateboard wheels, and sometimes also used for quad speed skate wheels.

627 Bearings
Inside Diameter - 7 millimeters
Outside Diameter - 22 millimeters
Width (unsealed) - 7 millimeters
Width (two shields) - 7 millimeters
Typical Use - Often used in artistic and recreational quad roller skate wheels and sometimes also in quad speed skate wheels.

688 Bearings
Inside Diameter - 8 millimeters
Outside Diameter - 16 millimeters
Width (unsealed) - 4 millimeters
Width (two shields) - 5 millimeters
Typical Use - Extra light "microbearing" that is the standard bearing used in some of the newer fitness and speed skate wheels.

698 Bearings
Inside Diameter - 8 millimeters
Outside Diameter - 19 millimeters
Width (unsealed) - 6 millimeters
Width (two shields) - millimeters
Typical Use - Extra light "microbearing" that is the standard bearing used in some of the newer fitness and speed skate wheels.