The new PowerGlide? 1050 cassette offers an innovative approach to 10-Speed cassette design. Our cassette performance is optimized by material choice, tooth profile and shift ramp design for quick and positive index shifting. The cassette shifts efficiently and positively in all high performance situations. Our new cassette features a semi-spidered construction for a maximum stiffness to weight ratio and is available in many optimized configurations to best match a wide variety of uses.