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I love DT Hubs. The exploded picture of a 240s hub (DT Swiss website), shows what can be accomplished by a simple design and exacting craftsmanship. All of their hubs use the same design. You can see the 100% contact drive disks (#2) with the simple engagement springs. Observe the four preset cartridge bearings (#3) and the hub and cassette body that never need adjustments (no special tools needed, ever). The press-fit end caps with the extra outboard contact seals (#1) keep out moisture and dirt. I have built hundreds of wheels with this hub and have only replaced two bearings.