Building a human powered minivan out of a Surly Big Dummy

Published at : 23 Dec 2025

The Surly Big Dummy is the last of a dying breed: Human-powered long tail cargo bikes. This is the last year Surly is making the Big Dummy, but I bought mine used on Facebook Marketplace for $800. The previous owner had customized it for use at his bike shop, running errands and delivering bikes to customers (yes, it tows bikes). I customized the Big Dummy for spending the day with my kids. For now, my daughter will ride on the back with her balance bike mounted on the rear, and a year from now we will include a baby seat for my son.

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Pat https://www.instagram.com/looneygoesfastsometimes/
Taylor https://www.instagram.com/tayweeks/
Anna https://www.instagram.com/annatellu_hwhat/
TJ https://www.instagram.com/timothyjamesphoto/

Alt Angle Clamp https://altanglecycling.com
KS Exaform Dropper Seatpost https://amzn.to/457i6om
Nalgene bottle cage https://cults3d.com/en/3d-model/gadget/nalgene-water-bottle-cage
Kid corral https://surlybikes.com/parts/kid_corral
Kickstand https://surlybikes.com/parts/double_wide_kickstand
Copilot Limo Seat https://amzn.to/3PwWyf5
Arclight pedals https://amzn.to/3PwHYEf
Miles wide sticky fingers https://amzn.to/3EUAM00
Cheap bike rack https://amzn.to/3RFfYRB

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