All posts by spinningmagnets

Grew up in Los Angeles California, US Navy submarine mechanic from 1977-81/SanDiego. Hydraulic mechanic in the 1980's/Los Angeles. Heavy equipment operator in the 1990's/traveled to various locations. Dump truck driver in the 2000's/SW Utah. Currently a water plant operator since 2010/NW Kansas

Using an eccentric bottom-bracket adapter t...

Jun 22, 20194 Comments

Older bicycles (and many of the newer affordable style) do not use the common Shimano threaded cartridge bottom-bracket. Instead, they use a larger-diameter smooth tube

Ebike Pioneer Turbo Bob, RIP

May 02, 20195 Comments

Bob Bandhauer was a tirelessly enthusiastic promoter of electric bikes who lived in San Diego, southern California. Bob noticed that there were a lot of

Adding the Bafang Ultra Max to a Frame

Apr 16, 20196 Comments

Before we get started, adding a Bafang Ultra Max to a frame will involve welding, so if you don’t weld, or…you don’t know someone who

Introduction to battery pack design and bui...

Mar 30, 20194 Comments

If you are new to battery-pack building, but you are also a pretty capable fabricator, this article will define some of the common materials and

Schwinn selling Bosch mid-drives on Amazon

Mar 26, 20192 Comments

Schwinn is now selling Bosch mid-drive ebikes through Amazon, and I’ll tell you why this is news. Schwinn I grew up in Southern California, and

Mongoose Envoy, a new longtail cargobike

Mar 09, 201912 Comments

This isn’t an electric bike, but cargobikes are one of the best platforms for building an ebike. They have always been expensive, and this new

Introduction to battery pack design and bui...

Feb 21, 201913 Comments

Most garage-builders who decide to assemble their own battery pack usually have a lot of experience. However, pack-building continues to be a frequent source of