What is the Mundo?

I am the very happy owner of a Yuba Mundo Cargo bike, a purpose-built, long-tail, heavy-duty bike that is built to be a serious replacement for a carbon-emitting vehicle. I'm learning more every day what a bike can do, and I'm becoming convinced that a cargo bike with an electric assist is a truly fantastic machine!

Saturday, April 13, 2013

Modifying the Mundo to carry 2 bikes

This weekend in Fort Collins there is a big meeting at New Belgium Brewery, sponsors of the Tour de Fat.  Most of the attendees are bicyclists (I wonder how many of them are doing the 30 Days of Biking challenge?) and New Belgium, in cooperation with the Fort Collins Bike Library, is providing them with bikes to use for the weekend.
The Mundo with 2 bikes for the Bike Library

 Volunteers were needed to move the bikes from a storage building to the Bike Library Kiosk where people could pick them up.  The plan was: ride a bike from the storage to the kiosk, then walk back for another one.  Total bikes to be moved was about 65!  Well, ya know, I hate to walk, so I figured out a way to carry 2 bikes at a time on the Mundo.

2 Bikes on the old roof rack trays that I mounted to the lower rack.  Very easy to ride with.
I had an idea that if I could find some old roof rack trays, I could probably mount them on the rear carrier somehow.  Luckily, I found some old trays nobody wanted at the Fort Collins Bike Co-op, attached them to the lower part of the rear rack, and I was good to go!

Here's how I did it:

I had to put them at an angle so that I would have room to pedal, and the trays would not stick out too far in back.

I could only find 2 full-length trays, and they don't match.  But hey, they do the job.

I drilled holes in the tray, used some longer bolts than the ones that came with the rack.  With the longer bolts the tray could be attached using 2 of the existing bolt holes.

The right-side tray was an older style, but was even easier to attach.  I had to remove the clamp assembly that was designed to hold the downtube, and I had to drill through one of the tubes to get my bolts in, but it is very secure.
Here's another view of the right side, you can see that there is room to pedal.  That thing that looks like it has a bow on it is the old ammo box that holds my 15Ah 36V Ping LiFePO4 battery.
You may think that this is a lot of work to go through to move some bikes a few blocks.  It took me about an hour and a half to figure out and install the trays, but it only took half an hour to move all the bikes (there were lots of other volunteers).  The setup will come in handy again on Sunday when we have to move all the bikes from New Belgium back to the storage building, but the real reason I did it was so I would have a secure way to carry my mountain bike up to the trail-heads in the foothills.  It has always bothered me that people drive their cars to go ride their bikes.  Well no more!  This proof of concept shows that the electric-assist Mundo can easily carry a mountain bike to a trail-head that is a good 10 miles out of town (or more), and it avoids the drudgery of riding a fat tire bike on the road.  Now to get the mountain bike tuned up and ready to ride.  Hmmm, maybe some new tires for it this year?


  1. Hi, I just found your blog and I have been thinking of building an electric Mundo. I saw that you have a eZee motor kit & a ping battery. Did you build yours? Who made the box for your battery?

  2. Hi, I got the eZee kit from Grin Cyclery and the Ping battery, which is the 36V 15AH version. Also have the Cycle Analyst from Grin, which allows me to limit the current draw to 20 Amps to protect the battery. I built the box from an Army surplus ammo box, which had to be cut down to reduce the width enough to fit in between the cranks. It works great!