REAR Wheel Caster. Replacement Rollator Walker Parts. 

For the Medline Steel Rolling Walker Rollator MDS86850ESKD, 

the Medline Aluminum Rollator Walker with 6 " wheels MDS86850E

the Medline Steel Basic Rollator Walker with 6 " wheels MDS86830EBLS

and the Medline Basic Steel Rollator Walker with 6 " wheels MDS86850ES

NEW 

Medline brand

The rear wheel has the bearings in line with the hub on one side and receded on the other, as shown in the pictures from each side

Wheel Size 5 3/4 " x 7/8 "

Axle diameter 5/16 "

Hub 1 1/2 "

For the Medline Rolling Walker Rollator series with 6 " wheels