The Cardan drive shaft is very high quality and extremely durable. Hence we give a lifetime guarantee: no problem.
The technique used in the Cardan shaft drive system is almost as old as the bicycle itself. Shaft driven bicycles were invented late 19th century. They were extremely popular because there was no danger for the wide clothes ending up in the chain. Due to the impossibility to use gears the system was supplanted by chain-driven bikes.
Nowadays, because of modern production techniques, it's no longer a problem to use a shaft drive system in combination with gears. Therefore all advantages of the shaft drive technique (clean, low maintenance and save) can be used again. The Cardan shaft drive is extremely durable: it last more then 30.000 kilometers
How it works
Shaft-driven bikes have a large bevel gear where a conventional bike would have its chainring. This meshes with another bevel gear mounted on the driveshaft. The use of bevel gears allows drive from the pedals to be turned through 90 degrees. The driveshaft then has another bevel gear near the rear wheel hub which meshes with a bevel gear on the hub where the rear sprocket would be on a conventional bike. The 90-degree change of the drive plane that occurs at the bottom bracket and again at the rear hub requires the use of bevel gears.
A comparison of shaft vs traditional chain driven bicycles:
||Cardan shaft drive
||low, no chain, no grease, no pain. Simple internal gear shifting.
||pretty much: regular cleaning, greasing and adjusting the chain. Complicated derailleur and chain wheel system.
||gears will not fray, gears are enclosed.
||broken chain, clothes can get in the chain. Gears are in open air.
||no oil, grease or dirt.
||loads of oil, grease or dirt.
|loss of power
||maximum 3%. When riding you won't notice any difference.
||when the chain is in optimal conditions: 2%. Useally more, when the chain is not cleaned, greased and adjusted frequently.
||dismounting the rear wheel, to change the tyre, is done within minutes.
||changing the rear tyre is quite a complicated and dirty job.
A scematic drawing of the Cardan shaft drive system. It's simplicity makes it reliable. Because of this we provide a unique lifelong guarantee on the Cardan shaft drive system.