Category Archives: tech zone

Basic Budget Tool Kit

We keep an eye on the blogosphere, and thought that this straightforward article about the basic tool kit you should keep on your Yuba should be shared with a larger community. It is from the blog.

For Lindsay of You Ain’t Got Jack: Basic Budget Tool Kit.

I recently replied on a blog post by Lindsay of the blog “You Ain’t Got Jack“. I really like the fact that Lindsay has taken it upon herself to get healthy by riding a bicycle. This is the same reason that originally took up cycling again. My reply to her post was about the need for carrying a spare locking cable for the Yuba Mundo inside the giant Go Getter Bags. This is an idea that hatched like a new born baby chicken with the incubator on set in over drive when I realized on a grocery run that I didn’t grab the key chain with the key for the U-lock that lives on by Yuba. So I rode over to Home Depot and bought a combination cable lock to make its place in my go-getter bags. I figure any lock is better than none in my low crime area.

So on to helping a fellow cargo biker:
A basic budget minded tool kit (what I carry on my bike):
  • $1 Small Adjustable Wrench (that fits the Yuba’s rear axle bolt and front bolt)
  • $5 Basic Inter-tube without Slime
    • Slime tubes are good but it makes the tube thick and harder to store in a saddle bag.
    • Make sure it fits your needs (know your tire size)
  • $2 Bicycle Flat Repair Kit (old fashion glue kind, none of those peal and stick jobs here).
    • I remove the patches, sand paper, and rubber cement from the container it comes in (that just takes up space)
    • Practice! If you’ve never repaired an inner tube before learn how to!
    • I usually just replace tubes and only patch to “get home,” wasteful, I know, but I don’t like slow leaks and patches are hit and miss.
  • $10-12 Compact Air Pump
    • Just be careful you don’t damage the inner-tube’s nozzle thingy filling it up (it can get cut on the rim if you don’t support the pump while airing up the tire)
    • For the reason stated above, I sprung for the CO2 Air pump and I carry 1 extra CO2 Cartridge for good measure. The CO2 route cost usually between $25-$60 depending on the model and you will have to shop at a bike shop to get these.
  • $1 of spare cheap-o AAA Batteries as back ups to my lights.
    • Get what fits your needs and I like cheap-o non-alkaline batteries are because  cheap and most importantly they are very light weight.
  • $7 Bicycle Multi-Tool
    • Something Similar to one posted in the link above.
  • $10 Under the Saddle Bag just a cheap department store (Target) one is fine, just make sure everything fits. These are also know as wedge packs.
  • $2-3 Plastic Tire Wrenches – These help get that tire off the rim. You need 2 or 3.
    • I like the kind that fit together for storage  (more compact)
So the grand total comes to $38 to $41 for the basic pump set up and $51 to $86 for the option with the CO2 Pump which will not make your arm fall off when installing a new tube, and it gets you back on the road faster. Plus you want to have a $20 bill tucked away in there too as well as a couple of band-aids.
In researching the options out there I saw somethings that I liked as a basis of a kit, personally I think the an extra inner-tube is a non-negotiable item.

For home use I’m more advanced setup with a Park Tool Bicycle Repair Stand, Turing Stand, and a Tool Kit from Performace Bicycles. Perhaps I’ll a blog on that later… I was able to completely rebuild an old cruiser with those tools.

You can read more posts about by Matthew and Tina in their blog at,

DIY Peanut Shell Weather Protection


Lindsey of the You Ain’t Got Jack blog is a pretty crafty lady. She has figured out how to provide sun, wind, rain, snow and sleet protection to a child sitting in a Peanut Shell. The coolest part about it, is that the sun shield snaps off and snaps right onto a foldable stroller. The best part about it, is that the whole solution costs less that $20!

Here is the link to her instructions.

Using the Cycle Analyst with the elMundo Cargo Bike

Cycle Analyst info

Voltage, Power, Speed - Screen 1

The Cycle Analyst (made by Grin Technology in Canada) is the unit that can be seen on the handle bar of the elMundo Electric Cargo Bike. The Cycle Analyst is the bicycle onboard computer; it is connected to the battery, the controller and the odometer. With the Cycle Analyst the e-bike rider can then have a sense for:
the speed in km/h or miles/ hour.
• the power used by the e-bike in Watts.
• the electric potential in Volt.
• the current in Ampere.
• the electric charge in Amp/hour.

Prior to using the Cycle Analyst and in order to really take full advantage of it,  it is essential to learn:
º to read the screen and the data provided.
º to reset the unit after having charged the battery.
º to parameter the CA properly, this includes (wheel size, shunt resistance, unit…).

The complete Cycle Analyst manual can be downloaded here.

A) How to parameter the CA?

Setting up the Cycle Analyst

Hold-on left button to set-up

The first thing to do when receiving/ installing the Cycle Analyst is to set it up properly. If this is not done prior to riding the bike, all data read on the Cycle Analyst unit might be wrong.

Step 1: Hold the left button for 2 seconds and then toggle on the right button to the various screen.

Step 2: Set the essential parameters:
• wheelsize (2065mm for the elMundo)
• unit (km/h or m/h)
• RShunt (specific to each controller)
• number of poles (see manual for details -> should be 1)

Wheelsize set-up

selecting proper wheelsize

Cycle Analyst selcting RShunt

RS Shunt setting

B) What’s on the screen and what it means?

The Cycle Analyst shows multiple screens:
# 1 the V,W,A,Ah screen.
# 2 the V,W,A, Km/h screen.
# 3 the Total W/hrs used by the bike over time.
# 4 min, max Amp screen
# 5 the screen resuming the # of cycles

The screen 1& 2 are the most important one. You will see Voltage (V),  the Power(W), Current (A) used and most importantly the consumption of current per hour (Ah). This last indication is critical since it displays how much current is left in the battery. In the picture on the left it reads 2.814Ah, assuming that the elMundo Electric Cargo Bike is using a 37V 10Ah battery, it means that there’s 7.186 Amp to be drawn from the battery. In other words when the reading gets close to 8.5 A/h, you will be running out of battery soon! So charge it! But every time your recharged the battery (fully) you need to reset the cycle analyst to 0! In order to this hold the right button for 1 second.

* if you had a 14Ah battery, the battery would run out close to 13-14Ah

Cycle Analyst

Voltage, Power, Current - Screen 1

Cycle Analyst info

Voltage, Power, Current

Cycle Analyst

Total Watt/ hrs used - Screen 3

Screen 4

Amp min- max and voltage - screen 4

Screen 5 Cycle Analyst

Number of cycles- screen 5

For more information contact us

Make your own Tow Tray from a Running Board

The Mundo is great for hauling another Mundo or any bike for that matter.  The Mundo Side-Loaders provide a cradle for the front wheel of any bike to be towed.  The only problem is that you need to use lots of padding to keep either bike from getting scratched.  Then I had a brainstorm (look out, marketing puke in R&D) and came up with a pretty cool way to modify a Mundo “Running-board” to solve the problem.  I call it the “Mobile Bike Rack”.  This solution makes hauling another bike a snap.  Loading a bike to tow takes less than a minute, and no scratches!

You can purchase the running boards from your local Yuba dealer or order your running boards on-line here.


Here’s what you do.  First, I made mine to fit the left side of the Mundo, so when I’m towing a bike it doesn’t end up hitting something on the side of the road.  Then:

1. With the running board mounted on the Mundo, use a marker pen to draw the outline of the side-loader on the underside of the running board.

2. Take the running board off and draw a line between each of the strap holes using a straight-edge.  Draw the rest of the slot to be cut out.  I made my slot 2″ wide to fit the Mundo’s WTB Freedom Cruz tire that comes stock on the Mundo.

3. Make sure the slot is as long as you can make it.  Draw rounded ends to complete the outline of the slot you are going to cut out.  Using a jig-saw with a fine-tooth blade, cut out the slot. Sand the edges with some 100 grit emory paper.

4. Use the piece you cut out as a “scratch guard” that will be mounted the Mundo’s frame.  Draw a line between the strap holes and remove excess.

5. Make marks on the scratch guard to align with the braze-ons on the rack and drill 3/16″ holes.

6. Mount the scratch guard onto the rack.

7. Wrap the mounted scratch guard with some padding to protect the fork of the bike being towed.

8. Here’s the finished product.  (Minus the padding)

9. The front wheel of the towed bike fits right into the slot.

10. Use a Yuba Strap to secure the towed bike to the Mundo

And you’re off!

Peanut Shell combinations!

About carrying multiple kids, sickness   passengers and groceries on the Mundo.

Peanut Shell + Hold-On + Soft Spot OR Peanut Shell + Go-Getters

Child Seats and Mundo versions

One Happy kid on the Mundo

One Happy kid on the Mundo

The Yuba Mundo Utility Bike is a practical and comfortable solution for carrying kids. For kids from 1 to 4 years of age (up to 22kg or 48lbs), we recommend strongly the use of a Child Carrier. The model of choice recommended by Yuba is the Peanut Shell, it is:

• comfortable
• provides great lateral and head protection
• easy to install
• solid and safe attachment system to the Mundo platform
• 2 seats can be attached to the Mundo platform
• CPSC and TÜV certified

The Peanut Shell is compatible with the Mundo V3.0 (21 speed or frame sets, blue, tangerine, black bikes) and with Mundo V2.0 (6 speed, 18 speed, green, orange). The width of the Mundo rear rack on those two versions is 18.1cm.

The version Mundo (single speed, 6 speed, upgrade 18speed kit, dark blue and red) are NOT compatible with the Peanut Shell, the rack is 22.5cm wide. If interested in carrying your little one on a V1.0 Mundo, we recommend the Bobike Child seat. The seat with a little tweaking can be installed, however it can’t be easily removed. Be aware that the Bobike doesn’t offer the same level of comfort and protection as the Peanut Shell does.

How to know if your Mundo is compatible with the Peanut Shell?
-> Measure the width of the rack if +/- 18.1 cm, then yes.

Next posts:
Go-Getters and Peanut Shell(s)
2 Peanut Shell seats and the regular panniers with the new “Open Bar”
Peanut Shell and Passenger kit (Soft Spot, Hold-On, Running Boards, and Wheel Cover)

More questions email: