The continuously adjustable pedal crank

Our patented, universal WX Vario bicycle crank adapter enables people with limited knee and/or hip mobility to train on a bicycle or ergometer. The length of the invalid crank is infinitely adjustable from 0 to 170 mm to ensure optimum effort and movement.

WX Vario | Einzelteile des Fahrradkurbeladapters

WX Vario | Der montierte Kurbeladapter mit Pedale und Zahnkranz

WX Vario | Die Tretkurbel montiert an einem Mountainbike

WX Vario | Verstellschiene ist stufenlos arretierbar

Determine your individual pedaling radius

Thanks to the infinitely adjustable length of the crank arm, you can optimize the pedalling radius to suit your individual range of motion and power input. The crank radius can be reduced from the maximum position to almost the 0 position using the sliding block.

WX Vario | Universeller Nachrüstsatz für alle gängigen Fahrräder/Ergometer

Training with limited knee or hip mobility

The bicycle crank adapter enables people with limited knee and/or hip mobility to train effectively and gently on a bicycle or ergometer. Athletes (e.g. after an injury-related break) can also return to cycling in a safe and controlled manner.

WX Vario | Schonendes Training auf dem Fahrrad oder dem Ergometer

Universal retrofit kit for all standard bikes/ergometers

The WX Vario is designed for all standard bicycle cranks. It is fitted directly to the existing crank or crank arm. Even unusual cranks can be fitted using the spacers supplied.

The WX Vario in detail

The scope of delivery includes the adjustment rail, two crank clamps, the sliding block, the pedal screw and spacers in various designs:

WX Vario | Scope of delivery with adjustment rail, sliding block, spacer block and pedal screw

The WX Vario is fitted to the existing pedal crank arm.
Your existing pedal will continue to be used.

WX Vario | Mounted on the pedal crank, with existing pedals

The WX Vario in practice

WX Vario | Montiert an einem Mountainbike

WX Vario | Montagebeispiel an der Tretkurbel eines Mountainbikes

WX Vario | Detailaufnahme der Tretkurbel

WX Vario | Montiert an einem Wettkampfrad

WX Vario | Anwendungsbeispiel an einem Rennrad

WX Vario | Montiert an einem Trekking-Bike

WX Vario | Detailaufnahme an einem Trekking-Rad

WX Vario | Anwendung am Beispiel eines Ergometers

WX Vario | Draufsicht auf das WX Vario am Ergometer

Assembly, adjustment & application

The WX Vario in the press

We are pleased about the report and the detailed presentation of our universal crank shortening in the BIKE magazine (08.11.2023).

“I still remember well the first time I sat on an ergometer with shortened cranks after a serious knee injury. I spun the pedals very slowly, carefully and unsteadily. It was the most wonderful feeling in the whole time after the accident and gave me new hope to get back on the bike. Apart from the physical rehabilitation benefits, a crank shortening adapter can give injured riders a positive mental boost.”
BIKE editor Jan Timmermann

Available soon

The WX Vario is currently still in the approval phase, but the first adapters will be delivered soon.

Pre-ordering is already possible. Cost per piece: 169 euros. The conversion kit for use on the right or left costs 59 euros. If you have any questions or are interested in a personal demonstration or test on site, please contact Mr. Andreas Sextl:

Pre-order by e-mail: anfrage@wexelpunkt-wxvario.de
By telephone on 08141 – 3538433

Available soon in the Wexel-Shop