Direct Mount Adaptor 39.5mm offset 100mm BB 34.9mm clamp w/shims 31.8/28.6

Problem Solvers Direct Mount Adaptor 39.5mm offset 100mm BB 34.9mm clamp w/shims for 31.8/28.6. These handy adaptors allow riders to install direct-mount derailleurs onto frames without the necessary mounts.Works for Shimano and SRAM High Direct Mount fron