Today were going to review part number 31-73-3. This is the Redline 42 mm cartridge-style
bearing for use on a Nev-R-Lube axle. This bearing is designed to fit Dexter 42
mm Nev-R-Lube axles with the six-lug, 5-1/2 inch bolt circle. This will work on hub and drum assemblies
with the drum size of 12 inches x 2 inches. This bearing does have measurements of 42
mm x 76 mm x 39 mm. Basically, what that is, the 42 would be the
inside diameter right here. I have a digital caliper right here. We can do a measurement. The 42 mm is on
the inside. The 76 would be the overall. That would be 76.