ABM – Adelsberger Bike Marathon (21st Adelsberger Bike Marathon)

The ABM – Adelsberger Bike Marathon (21. Adelsberger Bike Marathon) is a one-day cycling event organised by SG Adelsberg e.V., held in the Adelsberg/Adelsbergturm area near Chemnitz, Germany. The event day comprises multiple distances — principally 40 km, 20 km and an 8 km race — plus the ABM Duo team category and a children's balance-bike race. The competition hub and the official start/finish is the Wettkampfzentrum, which also hosts the event village and race-day information.

The routes are promoted as scenic and varied, with roughly 80% unpaved field and forest tracks and about 20% asphalt, offering mixed-terrain riding suitable for gravel or off-road bikes. The ABM Duo is run as a two-person team over the 40 km format and the children's balance-bike race (Laufradrennen) finishes at the Wettkampfzentrum; organisers note that all children receive a participant medal. Timing, registration and detailed schedules are published via the event website and the listed registration hub, with final start lists and results provided by the event's timing partner.