MH-P16 (TH070 MR128) 40 x 52 x 7mm 45/45 | Blueseal Bike Bearings™

MH-P16 (TH070 MR128) 40 x 52 x 7mm 45/45. Blueseal Bike Bearings™ are bicycle specific bearings. The tighter the seal is to the inner bearing race, the harder it is for water and dirt to get in — and the harder it is for grease to get out.