Index

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Mid-drive parts.

This mid-drive uses two freewheels mounted on a bearing.

(from left to right): At the left is the track sprocket that drives the rear wheel. The large 72-tooth sprocket is for a #25 machine roller chain and is the step-down gear for the motor. It's mounted to a single-speed freewheel. Next is a spacer, then the 7-speed freewheel that is driven by the crank. At the right is the 1.37"x24tpi bearing onto which the prior sprockets and freewheels are mounted.

At the bottom are the 5 1/2" bolt and miscellaneous hardware used to mount the double-freewheel to the frame.

This was an early configuration for this mid-drive.

2006/10/28 10:03:02

Metering Mode: matrix
Exposure time: 0.017 s (1/60)
Aperture: f/7.1
Focal length: 7.4mm (35mm equivalent: 37mm)
Flash: Yes (auto)
File size: 828934 bytes
Camera maker: Canon
Camera model: Canon PowerShot S410
Resolution: 2272 x 1356