61903 LLU/LLB A5 C3- ABEC-5 Radial Bearing (C3 Clearance) - 17mm x 30mm x 7mm and very smooth

and very smooth

61903 LLU/LLB A5L - Solid-Lube

labyrinth (LLU) seals for maximum protection against the elements

the 15º Angular Contact design of these bearings requires a light preload to guarantee the best adjustment

440C has the highest strength

61903 LLU/LLB A5 C3- ABEC-5 Radial Bearing (C3 Clearance) - 17mm x 30mm x 7mm and very smooth61903 LLB C3 ABEC 5 Radial Bearing (C3 clearance) 17mm x 30mm x 7mm A radial bearing generally used as a hub bearing and can be used as a pivot bearing, though the MAX type version of this bearing is better suited for suspension use. This ABEC 5 bearing features deep groove design races, with Grade 10 balls, dual lip, full contact LLU seals facing outwards to withstand daily abuse of use and the elements, and lighter contact LLB seals facing inwards