{"id":508,"date":"2025-07-02T02:48:25","date_gmt":"2025-07-02T00:48:25","guid":{"rendered":"https:\/\/wp.stromer-tech.info\/?post_type=ht_kb&p=508"},"modified":"2026-05-21T13:57:02","modified_gmt":"2026-05-21T11:57:02","slug":"brake-bleeding-problems-with-the-abs","status":"publish","type":"ht_kb","link":"https:\/\/wp.stromer-tech.info\/en\/knowledge-base\/bremsen-entlueften-probleme-mit-dem-abs\/","title":{"rendered":"Bleeding the brakes \/ ABS problems"},"content":{"rendered":"

If the brake lever can be pulled all the way to the handlebars and the brake has no or only weak effectiveness, there is usually air in the brake system. It needs to be bled.<\/p>\n\n\n

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As a DIY you can make yourself a cheap Universal venting set<\/a> and carry out the deaeration yourself.<\/p>\n\n\n

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How do I bleed the air?<\/h3>\n\n\n\n

how that works, I've in a Quick guide<\/a> compiled.

More links to \u00abhow-to\u00bb videos:

> Bleed the bike brake correctly<\/a> \u2013 it's that easy > TEKTRO | TRP
> Replacing a bicycle brake lever<\/a> \u2013 this is how it's done correctly > TEKTRO | TRP
> Tektro Service Videos <\/a>(incl. brake piston service: oiling and mobilizing) > TEKTRO | TRP
> For more on the Stromer ABS, see also here<\/a> in the chapter: BRAKES -\u00a0'ABS'<\/em>
> See also here<\/a> under Videos the tips from TRP.<\/p>\n\n\n\n

> Which oil<\/a> should be used?<\/p>\n\n\n\n

ABS<\/h3>\n\n\n\n

Because of the more complex routing of the ABS lines, air can become trapped in the system and be difficult to remove.<\/p>\n\n\n

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Professionals use, among other things, special "brake bleeders" (vacuum pumps) 1<\/a> | 2<\/a>) for quick and safe venting. This option is probably too expensive for the Stromer DIY.<\/p>\n\n\n

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Service instructions<\/h5>\n\n\n\n

Shimano also uses Blubrake's ABS module, but designates it as BS-AU 300. Shimano presents on its Website<\/a> various instructions available. For example, there is a dealer operating manual \u00abABS Servicesoftware\u00bb, which is used for basic setup and maintenanceEN<\/a> | EN<\/a>), as PDF here (EN <\/a>| EN<\/a>). To work with ABS, Blubrake's dedicated ABS service software and some external hardware are required, among other things (see System Requirements, p. 6). This is not an option for DIY.<\/p>\n\n\n\n

The system's venting is described in the retailer's operating manual, \u00abAntilock Braking System (ABS),\u00bb in the last chapter.EN<\/a> | EN<\/a>). See<\/a>\u00a0also chapter: BRAKES - 'ABS'<\/em><\/p>\n\n\n

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Many thanks to Ole Vogt for the tip!<\/figcaption><\/figure>\n<\/div>\n\n\n
DIY alternative<\/h5>\n\n\n\n

If you\u2019re just bleeding the brake system, you can hang the Stromer by its front wheel while bleeding it. For the passive method, leave it hanging vertically for 1\u20132 days. Occasionally squeeze the front brake lever. This causes the air bubbles in the system to collect in the brake lever\u2019s reservoir, where they can then be removed. Sources: speedpedelecreview.com <\/a>| electricbikereview.com<\/a><\/p>\n\n\n\n

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

If the brake lever still doesn't work properly after bleeding, the entire brake system must be checked for leaks. Special attention should be paid to:<\/p>\n\n\n\n