Designed as a direct replacement for the OEM design.
79-5001, 79-5002, 79-5006 these chain rollers feature the outer mechanical seal to protect the bearings from dirt and water.
All other designs are too narrow to incorporate this design and use triple lip sealed ball bearings for superior dirt exclusion compared to OEM bearings.
Ask a question about the All Balls Chain Roller Black 38 mm and we'll respond promptly. If you need immediate assistance, please call us directly at (250) 395-2366