There’s a darkness upon me that’s flooded in light
The Avett Brothers, Head Full of Doubt

GRAVELBIKE.com Shimano Alfine generator dynamo Wheelsmith Sun Ringle centerlock

  • Hub: Shimano Alfine DH-S500 dynamo, 32h
  • Rim: Sun Ringle Inferno 23, 700c
  • Spokes: Wheelsmith DB14
  • Rotor: Shimano SM-RT53, 160mm
  • Weight: 1590g (including rotor, quick-release, and rim strip)

It’s definitely not a weight weenie build, but the goal was to build up a reliable dynohub-equipped wheel for under $200.  Shimano’s dynamo hubs have proven to be extremely reliable, and the above build came in at $25 under budget.

I haven’t decided on a headlight, but I’ve narrowed the choices down to the B&M Lumotec IQ Cyo plus, and Philips’ SafeRide.  Either light will be supplemented with a smaller, battery-powered lamp (that’s equipped with a flashing mode).

Stay tuned…

2 thoughts on “Dyn-O-Mite

  1. Just curious. What does a flashing light have to do with gravel riding? For city riding, I can perhaps see it (sic) – just perhaps.

    — John

    1. My gravel-riding bike is also my commuter. The supplemental light serves a few purposes:

      • Extra visibility when riding on paved roads (hence the flashing mode requirement)
      • Additional illumination when riding at very slow speeds (off-road climbing, for example)
      • Back-up should the dynamo or main light fail
      • Hand-held use for making repairs, etc

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