Prestacycle UniBlock PRO Cassette - 11-Speed HG 12 Interface HG 12/11/10 Freehubs 11-34t Silver MFPN=07105257 6 Rim Width (Internal) 30

6 Rim Width (Internal) 30 Tire Type Tubeless Ready Valve Presta Valve Length Short 32-40mm Weight 487 Wheel Size 27

}Shimano ZEE RD-M640-SS Rear Derailleur - 10 Speed Short Cage Gray With Clutch Wide Ratio for Freeride

Closure Lace Color Core Black/Grey Three/Red Defined Color Black Gender/Age Mens Shoe Size (US) 6 Activity Cycling

It includes an easy to mount rattle free bracket and comes in a variety sizes and packages

Prestacycle UniBlock PRO Cassette - 11-Speed HG 12 Interface HG 12/11/10 Freehubs 11-34t Silver MFPN=07105257 6 Rim Width (Internal) 30Prestacycle UniBlock Cassette 11 Speed for HG 11 Freehub 11 34t Silver. Prestacycle UniBlock PRO Cassettes are machined from a single solid block of cold forged Chrome Molybdenum alloy steel then heat treated tumble finished and electroplated for added durability low friction operation and longer service life. The UniBlock PRO cassettes feature ARC shifting tooth profile technology that provides the fastest smoothest possible shifting to all systems