Viking to fit cantileverv brakessupplied as 1 pairswissstop offers the best braking performance in all conditions for all types of bike four different compounds are available for optimised braking control choose the compound that suits your applicationcompoundspower black suitable for less aggressive riding very good in dry wet conditions specifically recommended for rims made of softer alloy ghp ii high performance compund for aluminium rims excellent in the dry adn unbeatable i