Mark McM |
04-17-2024 04:23 PM |
Quote:
Originally Posted by phishrabbi
(Post 3373959)
The company Classified makes and markets a hub which has two gear ratios such that one can utilize a 1x system without sacrificing the gear ranges associated with 2x systems.
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The idea of using an internally geared rear hub matted with a cassette freehub has been done several times before, by Sturmey-Archer and SRAM. The differences between the previous systems and the Classified system are:
- Sturmey-Archer and SRAM used a 3spd internal gearing, while Classified's is 2spd
- The Classified system uses wireless shifting (the others used cable shifting)
- The Classified system is disc brake only (the others were rim brake only)
- The Classified system claims to be just as efficient as a 2x derailleur gearing (yet to be independently verified).
- The Classified system uses its own proprietary cassettes (which are very expensive at $230 - $300 each).
The advantage of these systems vs. a multi-chainring system are that they can be shifted under load, they are less likely to drop a chain (particularly if a narrow-wide chainring is used), and they are potentially more aerodynamic.
The disadvantages are that they are more expensive than a multi-chainring system, heavier than a multi-chainring system, and rear wheel changes are somewhat more complicated than with a multi-chainring system. An additional disadvantage of the Classified system is the reliance on proprietary cassettes. Also note that the Classified system doesn't integrate directly with other brands of shifters, so an auxiliary shifter specific to the Classified system is used.
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