07/07/2026
How Many Miles Will a Non-Sealed Chain Last on a Street Bike?
When used on a street bike, a non-sealed chain will begin to stretch and after approximately 3,100 miles (5,000 km) it can reach the end of its service life.
Although a non-sealed chain may have higher tensile strength than a sealed chain, a sealed chain typically lasts longer. Depending on the type of sealing ring, the service life of a sealed chain can be more than three times longer than that of a non-sealed chain.
Chain stretch is caused by wear on the pins and bushings. As material wears away, the pin shaft rotates in the direction of chain tension. Over time, this accumulated wear along the length of the chain creates what is commonly referred to as “stretch.” Factory-injected grease between the pins and bushings helps reduce this wear; however, without a seal ring, the grease will eventually escape. Once the pins and bushings are no longer protected, wear accelerates and the chain stretches more quickly.
Photo Provided by Yoshimura
For more detailed chain maintenance information visit our website:
https://rkexcelamerica.com/maintenance/
http://global.rk-japan.co.jp/maintenance/