Kasai Dynacoil FS (Field Serviceable) Dynamo Hubs  

Let’s face it. Even the most expensive dynamos can fail.  Most often it is by water contamination. If this happens when you are miles from civilization, then what? The electronics that we have become dependent on to light the road, call for help, tell us where we are, and snap pictures of our journey, slowly lose power and die. What then? 

Will your multi-tool help? 

You can’t replace a dynamo coil or bearings in the field like you can replace an inner tube. 

Not unless you have the KASAI Field Serviceable hub. 

With just a 36mm flat wrench, you have access to the coil assembly and hub bearings. If your hub conks out, just replace it with a new coil assembly. If you went thru a few creek crossings and are concerned about condensation building up, you can take out the coil to inspect and air out.

• Compatible with 26” to 700c wheels (6v/3w)

• Meets German StVZO standards

• Achieves 72% efficiency at 10mph

• 6061 T6 AL shell/7075 AL end caps•

• Teflon-insulated copper wire from Japan• Weight: 445g to 495g

• Weight: 445g to 495g

Available Styles:

9 x 100mm QR Non-Disc SRP: $129.99

9 x 100mm QR 6-Bolt Disc SRP: $139.99

15 x 100mm Thru-Axle 6-Bolt Disc SRP: $189.99

15 x 100mm Thru-Axle Center Lock Disc SRP: $189.99

Replacement Coil Assemblies start at $89.99

Bearing Cap Removal Tool: SRP: 4.99


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South San Francisco, CA 94080

Our Team