The standard currently does not include a hard limit, the implicitly given limit of the total weight being, however, around 100 kilograms. The limit is easily exceeded, a fact made clear by a simple calculation: According to the manufacturer’s indication, the weight of an average electric hardtail is mainly above 19 kg in model year 2017. Adding a packed rucksack with carefully calculated 6 kg, the rider’s weight including personal equipment (clothing, shoes, helmet) must not exceed 75 kg. According to the official statistics, the German average man, however weighs 84.3 kg (source: www.destatis.de). For him, the safety reserves of the mountain bike standard are definitely not sufficient, if he sits on a customary ISO tested electric mountain bike.
In order to account for the loads arising during the ride, Zedler-Institut developed SAFETY tests for bicycles and pedelecs which are based on the ISO standard, but subsequently go beyond these requirements. Frames and components do not only undergo tests with higher loads, but also tests which are not included in the standard. According to our experience and the customer service departments of our clients, the bicycles can be approved for higher weights of 120 or 140 kg with a clearly reduced failure rate.
These types of tests and load levels were developed on the basis of our experiences from our activity as bicycle experts writing expert reports about material failure during the ride. The operational safety of all products that pass these strict requirements will in addition be awarded with the Advanced or Advanced Plus seal of Zedler-Institut. In general, SAFETY tests will be performed in the laboratory of Zedler-Institut within three to ten working days.