We chose the rim for three primary reasons over a bicycle hub:

  • Power Output: The outside of a bicycle rim spins monumentally faster than the inside hub. Thus, our generator spins at higher RPMs, making it more efficient and creating more power in a compact package. While some dynamos have attempted to generate more power on the hub, the trade-offs in complexity, cost, and weight are extremely high. Thus, we chose the rim as the least path of resistance (no pun intended )
  • Installation: PedalCell can be installed or uninstalled in minutes on most bicycle designs. Dynamo hubs, on the other hand, require time-intensive wheel builds that are difficult to construct. Moreover, hubs are only compatible with certain wheel setups, making their cross-compatibility limited if you decide to switch between bicycles or rim types.
  • Decoupling: We believe that you should have the option to completely deactivite our product if you prefer. Mounting on the rim allows users to mechanically decouple our generator from the rim, thus eliminating all drag. Hub-mounted dynamos require intensive disassemly procedures to remove, making their mechanical drag a permanement burden for most riders.

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