{"id":486,"date":"2025-07-02T02:24:52","date_gmt":"2025-07-02T00:24:52","guid":{"rendered":"https:\/\/wp.stromer-tech.info\/?post_type=ht_kb&p=486"},"modified":"2026-08-10T16:23:15","modified_gmt":"2026-08-10T14:23:15","slug":"abs","status":"publish","type":"ht_kb","link":"https:\/\/wp.stromer-tech.info\/en\/knowledge-base\/abs\/","title":{"rendered":"ABS"},"content":{"rendered":"

The ABS used by Stromer comes from the Italian manufacturer Blubrake<\/a>. It was first offered on the ST5 model from 2021 onwards and was the first in the industry for S-pedelecs. It is based on electronic sensors, a transmitter disc on the front wheel, and an IMU acceleration sensor (I<\/strong>nertial M<\/strong>easurement U<\/strong>nit). Dieser Sensor misst die Fahrdynamik des gesamten Fahrrads \u2013 also die tats\u00e4chliche Geschwindigkeit, die Neigung, die Beschleunigung und die Verz\u00f6gerung. Er dient als Referenz und erkennt, wenn das Hinterrad bei einer starken Bremsung abhebt und ein OTB (over the bar = Abgang \u00fcber den Lenker) droht.<\/p>\n\n\n\n

The actual braking force control is hydraulic. Without power (e.g. empty battery), the wheel continues to brake normally, but without ABS support.<\/p>\n\n\n\n

At speeds under 5 km\/h, the ABS does not engage. Additionally, the ABS system only affects the front wheel. If you brake too hard on the rear wheel, it can still lock up.<\/p>\n\n\n\n

Where is the ABS installed?<\/h3>\n\n\n\n

The ABS is housed in the top tube. Retrofitting on non-ABS models is not possible due to the increased space requirements.<\/p>\n\n\n

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The operating modes<\/h3>\n\n\n\n

The Blubrake Gen. 2, available since 2021, has four predefined profiles: Safety, Standard, Performance, Extreme, and Off. When the ABS engages, there is no feedback through a pulsating brake lever, as is known from brake pedals in cars. Brake force increases in the order of the listed profiles, while ABS intervention decreases. <\/p>\n\n\n\n

1. safety mode: <\/strong>In safety mode, the braking force is reduced. This increases the braking distance enormously, so that there is a risk of being carried out of the bend even with an unlocked front wheel because the system does not provide enough braking force.<\/p>\n\n\n\n

2. standard mode: <\/strong>Standard mode is well suited to e-bike beginners who often ride on gravel or poorly surfaced roads. The ABS reduces the braking force to such an extent that the front wheel does not lock up on dry and wet roads (on level ground). However, a practiced index finger of a fully concentrated rider still delivers the better performance.<\/p>\n\n\n\n

3. performance mode: <\/strong>On loose surfaces, the system only intervenes when you have already released pressure from the brake lever. If you pull the brake lever all the way, you can briefly provoke a lock-up; then the system opens and gives you back control of the front wheel with a lot of braking power and short braking distances.<\/p>\n\n\n\n

4. Extreme Mode: <\/strong>According to Blubrake, the mode is suitable for riders who want to slide the rear wheel, for example, through tight hairpin turns. The latter two profiles are not suitable for trekking rides or commuting.<\/p>\n\n\n\n

See \u201aFurther information\u2018 below for more practical details.<\/p>\n\n\n\n

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Which mode does Stromer use?<\/h3>\n\n\n\n

Upon a corresponding request from the stromerforum.ch member Olfener<\/a>, Stromer replied with the following:<\/p>\n\n\n\n

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Thank you for your inquiry and patience. The ST3 Pinion is equipped with the Blubrake ABS Gen. 2. Stromer uses the so-called standard configuration or standard mode of the ABS. The mode cannot be changed. In our opinion, the mode offers the best balance between performance and safety. However, the performance profile might also be set on the ST5.<\/p>\n<\/blockquote>\n\n\n\n

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Can the ABS profile be changed?<\/h3>\n\n\n\n
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No, Stromer has blocked the profile change. The block is stored on Blubrake's server and can only be changed with a suitable service notebook and an active connection to the Bluebrake server.Source<\/a>).<\/p>\n\n\n\n

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Auf Anfrage schrieb Stromer 2024:<\/p>\n\n\n\n

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Thank you for your request. We have deliberately opted for the standard mode because it is best suited to the bike. Unfortunately, we cannot help you to change this because we do not recommend it. I'm sorry that I can't help you here. (As of Aug. 2024 \/ Source<\/a>)<\/p>\n<\/blockquote>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

Can the ABS be deactivated?<\/h3>\n\n\n\n

That's only possible with a trick \u2013 and the question remains why one would do that!

Man kann die untere Schraube des vorderen Bremssattels etwas losdrehen und den Sensor f\u00fcr die Raddrehzahl bewegen. Auf der ABS-Sensor-Halterung am Bremssattel steht \u00ab1 mm Distance\u00bb (zur ABS-Geberscheibe an der Bremsscheibe). Wenn man den Sensor nach aussen schiebt und die Schraube wieder anzieht, kann das ABS die Radbewegung nicht mehr messen. Im Display leuchtet das ABS-Symbol dauerhaft gelb und das ABS ist ausser Funktion (Source<\/a>).<\/p>\n\n\n\n

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ST5 - Brake disk on the front wheel with ABS encoder disk and sensor from blubrake<\/figcaption><\/figure>\n\n\n\n

A disadvantage of this method is also that the service symbol, a warning message, or a firmware upgrade may no longer be displayed because the ABS signal lights up permanently.<\/p>\n\n\n\n

Problems<\/h3>\n\n\n\n

See<\/a> BREMSEN - 'Bleeding the brakes \/ problems with the ABS'<\/em>
See<\/a> FAQ - \u201aABS \u2013 Symbol \u2013 Functions\u2018<\/em><\/p>\n\n\n\n

More info<\/h3>\n\n\n\n

The Blubrake ABS G2 anti-lock braking system in the test<\/a>
Practical test: ABS for bikes | Bosch anti-lock braking system really good?<\/a><\/p>\n\n\n\n

<\/p>","protected":false},"excerpt":{"rendered":"

Das von Stromer verwendete ABS stammt vom italienischen Hersteller Blubrake. Es wurde erstmals beim Modell ST5 ab 2021 angeboten und war branchenweit das erste bei S-Pedelecs. Es basiert auf elektronischer Sensorik, einer Geberscheibe am Vorderrad und einem Beschleunigungssensor IMU (Inertial Measurement Unit). Dieser Sensor misst die Fahrdynamik des gesamten Fahrrads \u2013…<\/p>","protected":false},"author":1,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[98],"ht-kb-tag":[],"class_list":["post-486","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-bremsen"],"_links":{"self":[{"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb\/486","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/comments?post=486"}],"version-history":[{"count":45,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb\/486\/revisions"}],"predecessor-version":[{"id":12994,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb\/486\/revisions\/12994"}],"wp:attachment":[{"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/media?parent=486"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb-category?post=486"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb-tag?post=486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}