Welcome to the Urban Commuter Store
Surly Big Dummy MDrive Update
 I am finally done with machining the parts and I have already put the motor mount together.  I went with stainless steel this time.  The Raw Bead Blasted stainless steel looks cool.  Also, the motor mount is not welded together.  Instead, I kept everything simple by bolting it together using stainless steel 90deg angle bars.  Everything is still stiff and no flexing. 
 
   

 As of the 19th of April, you can pre-order your Surly

Big Dummy Mid-Drive Kit. It will take 2-3 weeks prior to

delivery.  Free Shipping on pre-ordered BD Kits and Free

Upgrade to 12FET Infineon Controller!

 Click here to PRE-ORDER
M-Drive Electric Cargo Bike Conversion Kit

 

 The M-Drive Electric Cargo Bike Conversion Kit is designed and built in the U.S.A.  It is specifically made for the Yuba Mundo cargo bike to take advantage of its versatility and heavy cargo carrying capacity.

I strongly believe that the Yuba Mundo is the best cargo bike in the market today.  It is worth all the time and effort designing and building the mid-drive kit for such an extra ordinary cargo / commuter bicycle. 

What sets the M-Drive apart from an ordinary front or rear wheel electric hub motor is that you get to utilize the bicycle’s gearing.  This is most useful when going up long steep hills with cargo, you will not stall, drain too much amps and your motor will run cooler.  The system is more efficient than direct drive front or rear wheel conversions.  Also, you can do all of these without pedaling.  The M-Drive’s motor is independent from the pedals of your bike.  It does not turn or spin your pedals when you power up your motor but you can go pedal with it too if you wish.  Furthermore, you can still use all three front chain rings that came with your Yuba Mundo Cargo Bike.  The system includes a front chain tensioner and an idler pulley to guide the changes in chain length when switching between front chain rings.  Top speed is at 20MPH ebike legal speed limit.


The conversion kit is perfect for businesses that are looking to go green.  This is a viable option for mode of delivery or transport.  It can also be for families or individuals who have existing Yuba Mundo V3.3 and newer, needing to be more mobile and travel farther distances with cargo.  If you live in an area where there are a lot of hills and your standard electric bike conversion for your Yuba Mundo quite can’t cut it, the M-Drive conversion kit is the answer.

 

As much as we want to keep the price really low, the cost of everything has gone up.  We do not and will never sacrifice quality and reliablity just to be able to sell something at a cheaper price.  We value your satisfaction and we will continue to deliver great products and innovations.

 

 

   
   
 

 

 

 
Surly Big Dummy MDrive Kit
Surly Big Dummy MDrive Kit

Surly Big Dummy Mid-Drive Kit. This is a complete bolt on kit for the Surly Big Dummy. Conquer Hills easily while riding with heavy cargo or when riding with your precoius little ones in the back. Utilizes the 9Speed cassette in the rear wheel so...

$1,599.00