The bike bible from Kraftstoff Handmadebikes – Welcome! For the Vorarlberg bicycle manufacturer Kraftstoff, design and innovative technology are of the utmost importance – the bike bible was created according to this guiding principle. The seven bike commandments lead everyone to their own personal, very individual bicycle, whether it's the high-performance hardtail bike for pros in the first commandment or the trekking bike for relaxed excursions described in the fourth commandment.