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Old 03-30-18, 01:00 PM
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Racing Dan
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Originally Posted by SquidPuppet View Post
Thanks for the links. But... something doesn't add up here.

No retainer + more balls = higher material cost
No retainer + more balls = higher labor cost

A Shimano CB-E110 coaster brake hub comes with retainer bearings and can be had for $20.00

A Shimano Dura-Ace 7710 rear track hub comes with loose balls and runs about $130.00

Why is an inexpensive hub that is designed for low speed clunking around given the "superior" retainer bearing system, and the hub designed specifically for racing given the "inferior" loose ball bearing system that has greater friction?

The CB-E110 comes with grade 300 balls, while the Dura-Ace 7710 comes with grade 25 balls.

Why would Shimano spend more money on materials and labor to provide racers with hub bearing performance and service life that is inferior to a beach cruiser or child's bike?

Something doesn't make sense here.
Without backtracking the quoted text, Im betting it only applies to cartridge bearings that cant be assembled without some space between the balls. The cage then spaces the balls out evenly in the race. In an open cup and cone bearing like shimano uses, you can use loose balls and just fill it up, mitigating the need for a ball cage.
Imo, on a bike its not the number of balls that determine the longevity of the bearing. Its the sealing. A clean bearing could last "forever" and a dirty one will rust and pit very fast.
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