Speedcore is a form of hardcore techno that is typically identified by its high rate of beats per minute and aggressive themes. Tracks can range from 240 BPM all the way up to 1000 BPM. Unlike other styles of aggressive dance music such as Gabber, the high rate of BPM makes speedcore less accessible as a danceable genre, although most fans of the genre headbang and mosh to the music.
A sub-genre of speedcore, Extratone, can be chiefly classified as extreme speedcore. Whereas general speedcore tracks range from the high 200 BPMs to a 1000, Extratone tracks are produced at a bare minimum of speedcore's upper limit - 1000 BPM. Ergo, the boundary between speedcore and Extratone tracks lies in that BPM figure.