Wheels Manufacturing 18307RS Bearing 18x30x7 mm Bicycle Axle For DT Swiss, Fulcrum and other Bicycle Hubs

Description
Inner (d): 18 mm Outer (D): 30 mm Width (B): 7 mm.
Grease does not need to be added extra..
MR18307 Sealed Cartridge Bearing is designed for some DT Swiss, Bontrager, Fulcrum and Giant hubs

This bearing is a peculiar bearing as it's only 1mm different to 6903-2rs which has a 17mm ID, instead of this bearing at 18mm ID.