Dual Drive Bike

August  25, 2016  We are now selling our first Dual Drive Bikes.  See our “Products” page for details.  The shaft drive version will be available after venture capital funding.


Please share this site with your cross training friends!WP_20141102_10_13_14_Pro




Note :  A newly designed chain version with an innovative black chain guard! The new “look” with the black plastic chain cover gives it a “cool industrial” type look.


We can attach the front shaft drive to any bike…for now we choose beach cruisers…our choices are limitless!

Video Chronology. We’ve come a long way baby! This is not your mother’s bicycle…lol

bike 025Asmaller
The first ever front shaft drive version of the hand pedaled Dual Drive Fitness Bike! The dual crown front fork set up is easily adapted to fit the head tube any bicycle on the planet. Now that is some sales potential! All the late night fitness equipment infomercials pale in comparison to this mobile exercise bike!

August 11, 2014

WP_20140621_17_59_45_ProSo it’s been awhile since my last update. The challenge of building a working Prototype for a chain version and a drive shaft version of the dual drive bike has been fun! I now have a working Prototype of each and I think both are going to be well received in the marketplace. The above and below pictured bikes are of the shaft drive and chain drive versions ridden in the up-coming crowd funding Video.  I have some sample gears that are in the process of being manufactured in China and will ship to the USA by the end of August 2014.  We will thoroughly test the gears and gear ratios before placing our very first large order.WP_20140810_12_32_21_Pro[2]




Officially filed a provisional patent (July 2014)on the  above “chain version”. Hopefully we will get a utility patent on both the chain drive and the shaft drive front wheel drive! Still “Patent Pending” on the shaft drive invention after 1 1/2 years.WP_20140810_12_39_46_Pro__highres





August 20, 2013  Officially Patent pending on a USA Utility Patent! Ever have a 50 page term paper due? Well it’s a huge relief  to get that project completed!  We were patent pending on a provisional patent.  The filing of a utility patent is quite a bit more challenging. I’ve also recently taken a rear hub apart and machined it smaller to receive and attach the sized gear I need to get the correct gear ratio for the front shaft drive. The spacing for the bottom gears was a problem. I think I’ve got the perfect solution and will be testing DUAL DRIVE PROTOTYPE II shortly. That of course means new drawings and re-machining additional parts.


This is all part of the invention process.  On to the crowd-funding video!


Update: June 3, 2013

The very first front wheel drive prototype is finished and attached  to a girls beach cruiser.  It was the only bike I could find in a local store with a 1″ headset….they are all 1 1/8.  My dual crown front fork that I have been transforming came with a one inch steer tube. I will post some pictures shortly and some video!  I am truly excited about how well the gears and housing ended up coming together with the dual crown front fork set up. I am not an engineer by any stretch but I do know that whatever you can imagine can be made in a machine shop….almost anything! If you can imagine it and draw it, it can be built! I will post some gopro video shortly of the first ever, front wheel, shaft driven , hand  powered and foot powered fitness beach cruiser. Cruising to the beach just got allot more fun!

Now that I have a working prototype of my dual drive invention I intend to get back to work on the “Crowd Funding” video! There is much work to be done….but remember,  it’s “Krowon”  no work just fun!  (No work spelled backwards….keeping it fun with passion!


The first ever Bojon Beach Cruiser!
The first ever Bojon Beach Cruiser! True Crossfit Bike …all others are pretenders!



Love the new bikes!

WP_20141102_10_13_14_ProWP_20140810_11_18_09_ProWP_20140507_12_53_12_Pro__highresThe new bikes look really sharp.  And we are hearing lots of positive buzz about the ride, the design and the concept.   Very exciting product … cannot wait!  I will eat many donuts in preparation for the flab I will lose when I get mine!


Front wheel drive bicycle adds the upper body to cycling fitness, Faster with better fitness options. Regular bikes are seriously boring to ride!

Starting a new Dual Drive bike business! Your old foot powered bikes are a thing of the past!

Two years later…I am launching my Kickstarter campaign to hopefully get the Dual Drive Bike to market. It is truly a worthy cause! To be competitive in the bike business you have to go to China for manufacturing,  Ninety percent of all bikes in the world are manufactured in China.


November 2012….So, I am in the early stages of starting my new dual drive bike business. It’s been fun thus far. I am sourcing parts and bikes all over the world, building a web-site with very little knowledge or money to spend and working in my garage on the revolutionary new idea!  I purchased a chain-less bicycle from Dynamic a few weeks ago. It has a drive shaft instead of a chain and an 8 speed internal shifting rear hub and I love it.  I intend to move that same drive shaft and hub technology to the front wheel.  The handle bars  will be replaced with ones that rotate. The drive shaft will be run down the the right side front fork and connect to the front hub. The hand powered front wheel drive will look excellent bike 025Asmallerwith no greasy chains in your face! Voila, the first ever, chain-less dual drive bicycle! Cool beans! Umac 002

Two independent drives will power the innovative dual drive bike to faster speeds and a better workout for you. The picture above, shows how I connected a longer drive shaft  to the front hub and of course it works! It is simply a matter of getting manufacturing up and running and we will be in business.  The “Bojon Beach Cruiser” will be styling the dual crown front forks at a beach near you!

The photo with the yellow frame, is the old school look of my 25 year old front wheel drive fitness bike with sprocket and chains in your face. I really am excited about the new “look”!

chain drive close op

front view triple t



That is a picture of the shaft drive that I intend to be housed by the dual crown front forks on the left.
That is a picture of the shaft drive that I intend to be housed by the dual crown front forks on the left.










I filed for my patent in November of 2012 and am officially patent pending on the new chain-less front wheel drive and a totally chain-free dual drive  fitness bicycle.  Update from the patent office (Nov. 2014), I will be getting a utility patent!

The picture below is my very first working Prototype.  I love the sleek lines of the dual crown front fork set up. I think using the fork tubes to house the hand powered shaft drive unit and incorporating dual crown front forks into my overall design is a coup.  It’s sleek and actually improves the look of the beach cruiser and any other road bike! What do ya think? Sweet look right?

bike 025Asmaller


WP_20140430_09_16_01_Pro__highresI just paid for another domain name.  “www.DualDriveBike.com”.  I also just got the domain name www.crossfitbikes.com…….perfect! DDlogo Starting a business from scratch with no scratch means the buck starts and stops with you. Everything from logos, web design, prototype development, patents, photos, videos, industrial manufacturing drawings and overseas sourcing is totally up to me. Failure is not an option!  This is the fun part. Keeping it fun is the challenge!gear box - blk lblue 150 - R

With keeping it “just fun” in mind, I think the logo pictured below will look GREAT on your new T-shirt!


"back slang" or mirror writing... NoWork=Krowon
Building a better Bike! If you are passionate  about your new business then it’s not work! “back slang” or mirror writing… NoWork=Krowon…no work just fun!



The Dual Drive Total Fitness Bike!

New!WP_20140810_11_18_09_Pro Now a reality..no longer a  concept! The new improved chain drive Dual Drive Bike is available for 2015. (patent pending on the chain drive)

See “Products” page and be the first in your hood to get fit in 2015 riding the new Dual Drive Total Fitness Bike!

Start the DD revolution!

email: kenhaan@att.net

  • and in with the new! Concept dual shat drive bike! 
  •  Concept dual shat drive bike!  The “chainl-less revolution” is happening now! The drive shaft is in the front fork.
  •  Purchase the below Bojon Beach Cruiser for  $899.00 … Hand and foot powered dual drive bike.  This independent hand powered front wheel drive  utilizes 3 chain drives to power the front wheel!  The rear drive is a single speed standard chain drive. WP_20141102_10_13_14_Pro The black plastic up front chain cover adds an “industrial”  look to the dual crown front fork set up.
  • Email: ken@bojonbike.com for details. “I plan to employ all the out of work college students and beach volley ball “between jobs” guys and girls to get sales exploding and get these kids in shape at the same time”!

    bike 025Asmaller
    Bojon Beach Cruiser…aluminum frame, single speed front and year, dual crown front forks with shaft dive hand powered system up front and coaster brakes for your cruising pleasure!…no other bike like it on the planet! Back to basics for a total aerobic fun ride!


Crowd Funding: a means to get good projects funded and let small companies flourish by using the  power of the internet.  We think  the new fitness bike is a great project and  deserves a place on the planet. I hope to pre-sell 300 bikes or one full sea container.

Update: We gave Kickstarter a shot and it did not go as we had hoped.  Now, we will be seeking equity partners to buy bikes by the container overseas.

“Backing a project is more than just giving someone money, it’s supporting their dream to create something that they truly believe in”.

By purchasing our bike you will become a total fitness junkie AND  you will help promote out bikes by simply getting out there and riding them. The DD bikes are  very visual,  people cannot help but stop and stare!

This revolutionary dual drive fitness bicycle truly deserves a place on the planet. Our society seems to need more fun and outdoor fitness activities. Obesity and diabetes in America are increasing at alarming levels and this fitness bike is a product that will stem the rising tide!  WP_20140810_12_39_46_Pro__highresYes, I am adding a docking station for your smart phone. (lol)  All proceeds will be used to manufacture, patent, and further develop the new fat burning, extreme, exercise road bike.  Thanks in advance for contributing to a more fit world. Bicycles don’t pollute! Our goal is to raise $200K and to have a  container of dual drive bikes heading to America by August 2015.


Thanks again for supporting a worthy cause! Extreme bike fitness by dualdrivebike.com.