Racing and record-setting demonstrate the power and performance of Cruzbike’s technology. The core of the drive system is Cruzbike’s unique Dynamic-Boom Front Wheel Drive (DB-FWD), which is our version of the MBB-FWD system originally patented by Tom Traylor, and then improved and patented by John Tolhurst.
The advantage of DB-FWD is the linkage of the upper and lower body across the drivetrain as it rotates around the axis of the head tube. This linkage allows you to boost power when climbing or sprinting by engaging the upper body in much the same way professional cyclists do when they climb or sprint on standard road bikes.
Take a look at this slow-motion video of Lance Armstrong as he climbs. As his left leg makes the powerful downstroke, his upper body and core muscles, through his grip on the handlebars, force the frame to lean to the right, an action which forces the left pedal upward at the same time he is pushing it down– thus putting more force across the left crank. Simultaneously, the leaning-action of the frame is pushing the right pedal downward at the same time he is pulling up on the right pedal, thus applying more force through the right crank.
By using upper body muscles to move the frame to the right, he is dynamically shortening the distance between his left hip and left pedal during the compressive downstroke, while increasing the distance between the right hip and the right pedal during the tension-producing upstroke of the right leg, thereby getting more power into the cranks than he could otherwise. A split-second later, the pattern is repeated as he leans the bike to the left during the powerful downstroke of the right leg. Cruzbike’s DB-FWD system works similarly, except the axis of the “lean” is rotated approximately 73 degrees; from the horizontal, to the near-vertical.
This is why Cruzbikes are the best-climbing recumbents on the market. Every other recumbent bicycle currently in production has a fixed boom. There are dozens of makes and models of fixed-boom recumbents. Whether they are rear wheel drive or front wheel drive, pushing or pulling on the handlebar only steers the bike and has no effect on the position of the cranks or pedals, and therefore does not add to power production. Understanding this difference is essential. Sometimes it takes a few hundred miles of riding a Cruzbike for people to experience that “Eureka!” moment when all this technical talk translates into real world performance.
It’s also important to point out that because the feet and legs give input into steering, our DB-FWD bikes can be ridden with the upper body relaxed, when that type of riding is preferred, as during a long straight piece or a relaxing tour. They can even be ridden “no-hands” if you are willing to practice steering the bike entirely with your feet.
Cruzbike has learned through many years of research the best implementation of Dynamic-Boom Front Wheel Drive technology. DB-FWD is how Cruzbike combines the best features of diamond frame road bikes with the best features of fixed-boom recumbent bikes. This technology puts performance and ergonomics in the same bicycle. Once you master Dynamic-Boom FWD, you’ll understand why we have the most fanatically loyal customers of any recumbent bicycle company.
The cool thing is that no matter what kind of riding you do, you’ll benefit from Cruzbike’s years of racing and research. The same core technology found on our record-setting performance bicycles is also found on our utility series.
So what’s the downside? Why isn’t everyone riding a Cruzbike? Actually we think almost everyone should be riding a Cruzbike! We’re just still trying to get the word out. Because engaging the upper body is only one of many advantages, we’ve listed all the features that makes Cruzbike unique in the world of cycling:
|FEATURE COMPARISON||TRADITIONAL BICYCLES||FIXED BOOM RECUMBENTS||CRUZBIKE DYNAMIC BOOM
FRONT WHEEL DRIVE
|Aerodynamic body position||no||yes||yes|
|Full forward view in aero tuck position||no||yes||yes|
|Short, light drive chain||yes||no||yes|
|Upper body and core engaged for power boost||yes||no||yes|
|Hill climbing comparable to standard bike||yes||no||yes|
|Eye-to-eye with car drivers||yes||some||yes|
|Reduced chain line noise and grease||yes||no||yes|
|Commonly available tires and components||yes||some||yes|
|Front and rear wheels the same size||yes||some||yes|
|Straight chainline - no idlers||yes||no||yes|
|Fits regular car racks||yes||some||yes|
|Legs contribute to steering & stability||no||no||yes|
|Hill climbing comparable to traditional bike||yes||no||yes|
|Risk of head & neck injuries in frontal collisions||high||low||low|
|Risk of perineal injury in avid cyclists||high||low||low|
|Risk of decreased sexual function in men||high||low||low|
|Risk of decreased genital sensation in women||high||low||low|
|Risk of heel striking front wheel during turns||low||high||low|
|Prevalence of sore back, neck, shoulders, wrists||high||low||low|
|Legal in UCI, USAT, USA Cycling races||yes||no||no|
|OFFICIAL TITLE||DATE||RECORD||RIDER||RECORD CLASS||LOCATION||MODEL||ARTICLE||NOTE|
|UMCA 100 Mile Road Record - Men Unfaired Recumbent||Oct 11, 2015||3 hours, 59 minutes, 31 seconds||Larry Oslund||World Record||Surveyed Road Course Near Lumberton NC||Vendetta||Blog Post: Record Report|
|Hoodoo 500 Stage Race - Recumbent||Aug 28, 2015||32:31:00||Lief Zimmerman||Course Record||St. George, Utah||Vendetta||Learn More||521 Miles, 30,666 Ft Climbing|
|Hoodoo 500 Solo Race - Recumbent Male||Aug 29, 2015||44:12:00||Ben Tomblin||Course Record||St. George, Utah||Vendetta||Learn More||521 Miles, 30,666 Ft Climbing|
|Hoodoo 500 Solo Race - Recumbent Female||Aug 29, 2015||46:20:00||Maria Parker||Course Record||St. George, Utah||Vendetta||Learn More||521 Miles, 30,666 Ft Climbing|
|Assault on Mt. Mitchell - Recumbent||May 18, 2015||06:23:42||Ben Tomblin||Fastest Recorded Time - Male Recumbent||Spartanburg, SC||Vendetta||Learn More||102.7 Miles, 10,357 Feet Climbing|
|Assault on Mt. Mitchell - Recumbent||May 18, 2015||06:58:57||Maria Parker||Fastest Recorded Time - Female Recumbent||Spartanburg, SC||Vendetta||Learn More||102.7 Miles, 10,357 Feet Climbing|
|Calvin's Challenge UMCA National 12 Hour Championship||May 2, 2015||257 Miles||Maria Parker||Course Record||Springfield, Ohio||Vendetta||Learn More||Exceeds Traditional Frame Record||Bike Sebring Drafting 12 Hour Event - Recumbent||Feb 14, 2015||261.1 Miles||Maria Parker||Course Record||Sebring, Florida||Vendetta||Learn More||Exceeds traditional frame record|
|Texas Time Trials 26.5 Mile Sprint Solo Male Recumbent||Sep 20, 2014||1:12:38||Jim Parker||Course Record||Glen Rose, Texas||Vendetta||Learn More|
|Race Across America||Jun 11, 2013||11 days 18 hours||Maria Parker||50+ Record Female||Oceanside, CA to Annapolis, MD||Vendetta||Learn More||Exceeds traditional frame record|
|UMCA 24 Hour Road Record - Women Unfaired Recumbent||Oct 13, 2012||469.198 Miles||Maria Parker||World Record||Surveyed Road Course near Lumberton NC||Vendetta||Learn More||Exceeds traditional frame record|
|UMCA 200 Mile Road Record - Women Unfaired Recumbent||Oct 12, 2012||9 Hours 17 Minutes 3.0 Seconds||Maria Parker||World Record||Surveyed Road Course near Lumberton NC||Vendetta||Learn More||Exceeds traditional frame record|
|UMCA 12 Hour Road Record - Women Unfaired Recumbent||Oct 12, 2012||257.8 Miles||Maria Parker||World Record||Surveyed Road Course near Lumberton NC||Vendetta||Learn More||Exceeds traditional frame record|
|Michigan National 24-Hour Challenge, Women's Record||June 15, 2012||407.9 Miles||Maria Parker||Course Record Female||Middleville, Michigan||Vendetta||Learn More|
|Michigan National 24-Hour Challenge, Husband Wife Combined Miles||June 15, 2012||805.5 Miles||Jim and Maria Parker||Course Record Husband-Wife||Middleville, Michigan||Vendetta||Learn More|
|Heart of the South 200 Woman's Recumbent||Mar 31, 2012||11 Hours 59 Minutes||Maria Parker||Course Record||Birmingham, Alabama||Vendetta||Learn More|
|Bike Sebring Non Drafting 24 Hour Event - Recumbent||Feb 25, 2012||474.5 Miles||Maria Parker||Course Record Female||Sebring, Florida||Vendetta||Learn More||Exceeds traditional frame record|
|UMCA 200 Mile Road Record - Women Unfaired Recumbent||Oct 08, 2011||9 hours 27 minutes 10 seconds||Maria Parker||World Record - Female||White Oak, North Carolina, U.S.A.||Vendetta||Learn More||Exceeds traditional frame record|
|2011 UMCA 12 Hour Road Record - Women Unfaired Recumbent||Oct 07, 2011||250.3 Miles||Maria Parker||World Record||White Oak, North Carolina, U.S.A.||Vendetta||Learn More||Exceeds traditional frame record|
|Texas Time Trial Tin Butt 12-hour Solo Female Recumbent Bike||Sep 23, 2011||212 Miles||Maria Parker||Course Record||Glen Rose, Texas||Vendetta||Learn More||Exceeds traditional frame record|
|UMCA 100 Mile Road Record - Junior Men Unfaired Recumbent||Jun 11, 2011||4 hours, 54 minutes, 43 seconds||Will Parker||World Record||White Oak, North Carolina, U.S.A.||Vendetta||Learn More|
|UMCA 100 Mile Road Record - Women Unfaired Recumbent||Oct 01, 2010||4 hours, 27 minutes, 19 seconds||Maria Parker||World Record||White Oak, North Carolina, U.S.A.||Vendetta||Learn More||Exceeds traditional frame record|
|UMCA 100 Mile Road Record - Women Unfaired Recumbent||Oct 10, 2009||4 hours, 48 minutes||Maria Parker||World Record||White Oak, North Carolina, U.S.A.||Silvio||Learn More||Exceeds traditional frame record|
|UMCA 200 Mile Road Record - Women Unfaired Recumbent||Oct 10, 2009||9 hours, 55 minutes||Maria Parker||World Record||White Oak, North Carolina, U.S.A.||Silvio||Learn More||Exceeds traditional frame record|
|2009 UMCA 12 Hour Road Record - Women Unfaired Recumbent||Oct 10, 2009||240.01 Miles||Maria Parker||World Record||White Oak, North Carolina, U.S.A.||Silvio||Learn More|
|Saratoga 12/24 Hudson River Ramble 12-hour Women’s Overall||Aug 10, 2009||4 hours 48 minutes 211 miles||Maria Parker||Course Record||Saratoga, New York||Silvio||Learn More||Exceeds traditional frame record|