Cassette PG-1070The PG 1070 cassette offers an innovative approach to 10 speed cassette design. Its performance is optimized by tooth profile and shift ramp design for quick and positive index shifting. The cassette shifts efficiently and positively in all high performance situations. The cogset features a semi spidered construction for a maximum stiffness to weight ratio and is available in seven optimized configurations to best match a wide variety of uses. Speed