The 3 inch garage door sheaves I ordered are a perfect replacement for the ones installed since 1996. The ones I replaced had bad bearings due to the use of 5/16 vice the required 3/8 attaching bolts and 14 years of service. The price was better than anywhere else and I received them lickity split. I'll most definitely shop Preferred Doors again.
My son bought a home that had a worn out garage door opener but your parts were the perfect replacement to get things working again. You tube has some great videos on how to install the gear and sproket assembly. Between that and your quality parts he should be set for years to come.