I just finished removing, cleaning, repacking and reinstalling the front wheel bearings. Bike has 41K on it and no they did not have to be done. Getting the bearings out was a task. The flat tip punch and or the concrete anchor bolt just didn't work for me. I bought a "blind hole bearing puller" from Harbor Freight. I ended up using the bearing clamp portion of the puller and tapping the bearings out from the opposite side. When I removed the bearings a plastic spacer fell out between each pair of bearings. I have no idea as to the purpose of the spacer and the OEM parts fiche doesn't show it either. I reinstalled the spacers with the bearings any way. My question is does anyone know the purpose of these plastic spacers.