Thanks in advance for your help. I would like to replace the bearings and races in the rear hub of my Sun Cruiser 7. The bearings are loose. What size bearings and races are recommended? Feel free to make favorable recommendations.
Generally races (cups) in the hub are not replaceable.
The cones on the axle are replaceable, and can be ordered from Amazon or purchased at any bike shop.
Rear hub balls are almost always ¼" diameter, but you should measure to make sure. They can be purchased from an industrial supply, Amazon or any bike shop. Grade 25 is the worst you should use; Grade 10 are better. The lower the number the more consistent the ball sizes are.
Use a water resistant grease, such as boat trailer wheel bearing grease.