What madness is this? The KerVelo is a recumbent bicycle, that much is fairly normal, but this one uses a Pinion gearbox located in the front wheel, making it a front-wheel-drive bicycle, and that’s a bit more unusual.
Powering the front wheel of a bicycle isn’t complete madness though. Early bicycles involved powering the front wheel, like the penny farthing for example. But the invention of the safety bicycle and the evolution of the geared transmission means that most bicycles today, including recumbents, power the rear wheel.
It’s not the first front-wheel-drive recumbent that has been invented either. A quick Google search revealed the FrontRunner, another front-wheel-drive recumbent. Though comparing the two, the KerVelo does appear the smarter design, courtesy of the gear hub keeping the drivetrain components packaged away inside the front hub.
With his design, Marc has attempted to design a recumbent which he claims provides the optimal frame geometry and rider position, based on an ergonomic study he conducted. To help achieve this design, he’s sought to step away from a traditional drivetrain, and position the drive unit in the front wheels.
“The KerVelo concept has tried to challenge both bicycle and recumbent geometry by providing a semi-bent position,” says the inventor, Norway-based Marc Le Borgne. “It accumulates the advantages of comfort, visibility, safety, aerodynamic, mechanical efficiency and low maintenance.”
And that explains the reason for making it a front-wheel-drive bicycle. To achieve this, a German designed and manufactured Pinion gearbox, featured in some mountain bikes and e-bikes, is housed in the front wheel, with a set of crank arms and pedals directly attached. It provides an 18-speed setup, with a handlebar mounted gear lever.
This bike has no saddle. Instead, there is a rather conventional seat. The position can be adjusted to fit different riders and leg length, using a sliding post mechanism.
Currently the design is still a prototype. Now this is normally where a Kickstarter campaign comes in, but not here. Instead, KerVelo is seeking feedback, so if you’re interested, feel free to drop them a line on their contact page. They’re working on a trike version too.
Watching the videos above, the KerVelo certainly appears to work. There appear to be few issues with the pedals being attached to the front wheel, and turning and going around corners doesn’t seem to result in banging legs on the tyre.
We think Canadian bike brand Cervelo might have something to say about the brand name though it’s unlikely the two would ever be confused with one another unless Cervelo decides to make a recumbent, but we can’t see that really happening.
More at www.kervelo-bike.com
9 thoughts on “Have you seen KerVelo’s front-wheel-drive recumbent?”
Seems a bit tall to me,
Seems a bit tall to me, surely you’d want your backside down close to ground level between the wheels, for both CoG and aero reasons?
Notsofast wrote:
I agree. There doesn’t seem to be much aero advantage to this design compared with a normal bike. The problem must be with the legs. They have to be ‘above’ the wheel. If they approached the wheel from the side you couldn’t steer without catching on the wheel.
Big Wheel
looks like Stewie Griffin’s big wheel.
See also Raptobike for a
See also Raptobike for a conventional FWD recumbent
Or Cruzbike.
Or Cruzbike.
I’d like to see some tests of
I’d like to see some tests of these out of interest ;if road.cc can get one of happily write up a test on a Cruz bike.
Or Flevobike, though not
Or Flevobike, though not direct drive like the KerVelo
Interesting lateral thinking,
Interesting lateral thinking, but very much an urban design. The upright seat is good for visibility but likely to give ‘recumbutt’ over a longer ride, as well as drag on open road. Pig ugly, but in a nicely functional kind of way.
Cruzbike & Flevo require specific learning to ride, but not so the more ‘conventional’ Kervelo/Raptobike style whereby there’s no foot influence on steering.
I suppose I should mention
I suppose I should mention the Burrows Ratracer here, which is a FWD recumbent that does not require the rider to turn their feet/pedals with the steering.