All about bicycles, electric-assisted bikes, technology and safety in the press

In our daily work as we deal with bicycle safety, technology and user manuals we come across lots of safety risks. The most frequent ones are published in articles of the leading German special-interest magazines TOUR – Europas Rennrad-Magazin Nr. 1, BIKE – Das Mountainbike Magazin Europas Nr. 1 and E-Bike – Das Pedelec-Magazin to make this information important for the sector accessible to a wider public.

For many years now the Eurobike Show Daily accompanying the annual international Eurobike Show has given us the opportunity to publish our perspective on major developments in the cycle industry in full-page articles.

We also speak regularly in independent lectures about all topics relating to bicycle technology and bicycle market. In addition, we are regularly cited by further special-interest magazines or trade journals as well as more and more by radio and television and in their media reports, which shows us that we are completely right with our information. The section NEWS informs you about the latest news from our specialist fields. The reports and publications of this section are listed chronologically or according to topics of interest.

ZEIT ONLINE 2013/09/05
Reading time 1:30 minutes

Velophile – Stiwa and cycle sector in dispute about test procedures

For years bicycle manufacturers have been complaining about test results published by the German product testers Stiwa about their products. They blame the consumer organization for a lack of transparency and describe their test procedures in parts as unrealistic. The most recent example can be seen in the disastrous results of an e-bike test. But this time, unlike previous years, the sector loudly claims clarification.


Manufacturers demand transparent test criteria

Dirk Zedler, head of the renowned, identically named test institute, laughs when hearing that. Details about the set-up of the tests is something he has been waiting for years, says Zedler. In 2010 during the panel discussion at the Vivelo-Conference the Stiwa test manager Holger Brackemann had promised to make them available to him. He hasn't received them to date.


Therefore, according to Zedler, the challenge for the test institutes is to develop a suitable test procedure. For this purpose the data obtained during the test must be interpreted properly and transferred accordingly.

For this reason the bicycle expert posed the crucial questions: How do the testers weigh the different factors they have determined on the road? What do they leave off? How do they transmit the values to the test stand and thus to the bicycle? How do they arrange the test cylinders, how and where do they mount the cycle or the components? "The bicycles must be mounted realistically", he says. Because the test stand is designed to simulate the complete life of a bicycle within a very short time. Too high loads or inappropriate fixings have fatal consequences.

"Therefore you always need an approved frame model as blank sample", claims Zedler. That’s what is called benchmarking in specialized jargon. This means that an institute tests selected requirements on an approved model. It’s only in direct comparison that you obtain a reliable result, says Zedler.

Wrong method – or not?

Apart from test procedures and test set-ups there is no doubt for the expert: "The e-bike standard is weak, it is not yet fully developed." Due to the participation of all EU-countries, it takes a long time to implement fast improvements. For this reason he speaks for a local standard with transparency as ultimate objective. To help the manufacturers to improve their product and the buyers to obtain safe pedelecs.


Author: Andrea Reidl

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