MR 17287 LLU/LLB C3 - ABEC-5, Radial Bearing (C3 Clearance) - 17mm x 28mm x 7mm sale Weight - 32

Weight - 32

It is also used by Trek as a pivot bearing

This 12 tooth pulley set with 4mm upper & 5mm lower bolt-holes is designed as direct fit upgrade for SRAM 12 speed road and gravel derailleurs

BKS-6053 - BSA Thread-In

MR 17287 LLU/LLB C3 - ABEC-5, Radial Bearing (C3 Clearance) - 17mm x 28mm x 7mm sale Weight - 32MR 17287 LLU LLB C3 ABEC 5, Radial Bearing (C3 clearance) 17mm x 28mm x 7mm This ABEC 5 bearing features deep groove design races, with Grade 10 balls, dual lip, labyrinth, full contact LLU seals facing outwards to withstand daily abuse of use and the elements, and lighter contact LLB seals facing inwards to contain the 90% fill Mobil XHP 222 high pressure water proof synthetic grease. CN clearance specification is best for looser press fit bearing