Photo 1: Sprockets with rumbling procedure.
Photo 2: Sprockets without rumbling procedure.
We are going to have rumbling treatment on all our sprockets, aimed to provide safer, high quality and long lasting products to our customers. When riding the motorcycle, the sprockets will cause friction with chain. The sprockets with rumbling treatment will decrease the damage on chain, also has longer product lifecycle. However, sprockets without rumbling treatment would damage the chain, and cause the chain has shorter product lifecycle. Most importantly, using the sprockets with rumbling treatment would make riding much safer.
