Mpm-tech Dust pulleys Sram 11v 12t-12t

The dust pulleys in this version for SRAM 11 speeds, have a 12t-12t toothing, are entirely machined from solid, made of Ergal and assembled with very high quality bearings; the special design makes them extremely rigid at a torsional level and a particular processing makes the known chain "straddle" that sometimes happens with traditional or low quality pulleys almost impossible.