MRU chains utilize RK's proprietary Ultra Thin Seal U-Rings which allows the thickness of the seal to be less than 50% of the most common O-ring seal. MRU features 4 times longer chain life and will require less chain adjustments than comparable non-sealed 420 chains. Lightweight, low friction, sealed, U-Ring 420 pitch chain perfect for Honda® Monkey and Honda® Grom.
