Build Spotlight SpiderCarts Build

"The Black Widow": a Two-Year GrandDaddy Build in Gloss Red

Build by Derek Newbold /

Gloss-red SpiderCarts GrandDaddy buggy, the Black Widow, by Derek Newbold
Photo: Derek Newbold / YouTube

Derek Newbold gave himself a two-year homework assignment: build the SpiderCarts GrandDaddy, sharpen his welding along the way, and paint it the kind of red that stops people in the driveway. He called it the Black Widow.

GrandDaddy go kart frame laid out on a plywood work table
Photo: Derek Newbold / YouTube

The build was slow on purpose, fit around work and life, and the care shows. Clean gussets, a tidy rear end, and a finish you would expect on something you paid money for.

Red-painted go kart frame corner with engine and rear suspension
Photo: Derek Newbold / YouTube

“It was a fun project where I was able to put my welding skills to practice, and learn a ton about building a small vehicle.”

- Derek Newbold
Finished gloss-red GrandDaddy buggy on a driveway
Photo: Derek Newbold / YouTube

Two years, one very sharp buggy. If a long, do-it-right GrandDaddy is your kind of project, start with the same plans.

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See the GrandDaddy plans