Patent Patrol: Spreng Reng’s variable tooth valley radius changes gearing w/o changing teeth?
Spreng Reng has long promised extra watts due to the unique hexagonal shape. It’s also easy to write off Spreng Reng as a BioPace descendant, though it’s got several unique features that set it apart. You can read about that here. Now Spreng Reng is making it official by filing a patent for its chainring […]
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