SRAM, Apex D1, ChaîneFlattop technology is so much more than a distinctive look. It allows chains to be lighter, stronger and more durable than anything that came before. The Apex chain uses the same construction as the Rival and Force chains, with a polished grey finish. 12 vitesses La technologie Flattop permet dobtenir une chane plus troite encore plus silencieuse, plus robuste et plus efficace Avec lattache rapide PowerLock Flattop Acier poli, finition grise