Safety on the electric bike
First ABS for e-bikes
The Zweirad-Fachhandelsverband (ZEG) is presenting e-bikes with the anti-lock braking system developed by Bosch and Magura for the first time.
Many e-bikes today are equipped with powerful disc brakes. Although these are easy to control, the wheels can still lock up in the event of sudden braking or reduced tire grip due to moisture or road dirt.
An anti-lock braking system (ABS) for e-bikes could help to prevent accidents. The technology introduced by Bosch back in 1978, together with the brake system supplied by development partner Magura, can now be accommodated in a small space. On the 'Pegasus Savona EVO 10' and the 'Flyer Upstreet 4' - two of the first e-bikes available on the market with the new system - the brake assistant adds around 800 g to the weight.
How the E-Bike ABS works
There are sensors on the brake disks of both wheels that measure the wheel speed. If there is a sharp drop in speed or a significant difference in speed at the front and rear, the ABS control unit mounted in the box on the handlebars reduces the brake pressure for a fraction of a second until the wheel is rolling again; then brake pressure is built up again. This process can be repeated several times per second so that you can come to a safe stop despite the brake lever being fully applied. As a locked rear wheel is not such a big problem, the system only intervenes in the front brake on an e-bike - and the effect is astonishing: no matter how hard you pull the brake lever on a 'Pegasus Savona' or 'Flyer Upstreet 4', the braking force of the powerful stoppers is so precisely controlled that you don't run the risk of slipping off, even when braking at an angle.
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