Received my MR2015 bearings from China ten days after ordering. Three
days shipping by FedEx International Prioirity Mail. I inspected them and
they are right on target. My problem now is to choose the right dry
lubricant and apply it. I'm considering a graphite product and
a PTFE dry lube applied through the supplied micro tube. I will
show pics of the bearings next to the larger 15x21x4 mm. The
new ones are 15x20x3.5mm.
I'm favoring a dry PTFE chain lube like this one:
days shipping by FedEx International Prioirity Mail. I inspected them and
they are right on target. My problem now is to choose the right dry
lubricant and apply it. I'm considering a graphite product and
a PTFE dry lube applied through the supplied micro tube. I will
show pics of the bearings next to the larger 15x21x4 mm. The
new ones are 15x20x3.5mm.
I'm favoring a dry PTFE chain lube like this one:

WD-40 SPECIALIST 4 oz. Bike Dry Chain Lube, High-Performance Lubricant for Dry & Dusty Conditions 39001 - The Home Depot
WD-40 Specialist Bike Dry Chain Lube is a high-performance lubricant specifically formulated for dry and dusty conditions. Polymers in the Dry Lube formula quickly form a dry film to protect the chain
www.homedepot.com