Hammerschmidt is a crank and bottom bracket combination with an integrated planetary drive mechanism.
It’s essentially a two-speed crankset.
It gives the reliability of a single-ring system with chainguide and the gear range of a two-ring system, plus improved shifting. At first glance it looks shockingly small, with just a single 22 or 24-tooth ring.
Such a small front ring yields incredible ground clearance and, when combined with the 1.6x multiplication factor of the planetary mechanism inside, you get an approximate 36 or 38 tooth high gear. These 22x36 or 24x38 gear combinations are already standard on many all-mountain and freeride bikes so these numbers should be familiar to riders.
This technology is aimed at DH and FR markets where derailluers often get caught on the harsh riding terrain, but may offer some cross over benafits for anti theft, and anti vandalism aswell as providing benafits assosiated with longer periods required between services.
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