420 Primary Drive Sealed X-Ring Replacement Chain | Surron Ultra Bee eDirtyBike 5" from the back of

5" from the back of the seat on an MX3

Chain/mud guard bolts

This upgrade eliminates the stock star nut and stem bolt and replaces it with an adjustable locking kit to hold everything in place

Pivot design with return spring allows the lever to fold outward to prevent bending or breaking

OEM-quality zinc-coated steel for durability and corrosion resistance

420 Primary Drive Sealed X-Ring Replacement Chain | Surron Ultra Bee eDirtyBike 5" from the back of420 Primary Drive Sealed X Ring Replacement Chain Sur Ron Ultra Bee Replacement 420 sealed X ring chain designed specifically for use with DirtyBike primary belt to chain conversion kits for Sur Ron Ultra Bee. Built to handle the demands of electric drivetrains, the X ring design reduces friction while retaining lubrication for consistent, long service life. This chain is a direct fit for DirtyBike 420 primary conversion kits for the Ultra Bee. Key