Nukeproof 1 1/8" - 1.5" Headset Bearing Kit | Blueseal Bike Bearings™

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. Most non-bike-specific bearings are ABEC 1.