[Number of teeth: 15 teeth]

Product Description

Product description and care instructions:
Front side
Material: Chrome-molybdenum steel (SCM)
Heat Treatment: Carbon-nitride treatment
Surface treatment: Iron Tetrioxide film treatment (black)
Durability: 10,000 km - 30,000 km
Durability is for reference only. It depends on how you run, chain size, maintenance status, etc.
Lightweight holes are not included in all sprockets.
Replacement for sprockets.
The time for sprockets is very obvious, with no clear standards. In this way, the "wear on the teeth" is the judgment material. When the teeth have been sharp, the abdomen and sides have been sharpened, it is time to replace.
The front and back sprocket and chain are simultaneously replaced.
If you replace one or only one replacement is used, the replacement parts will not perform or durability and will accelerate the time of replacement, so if you think later, it is recommended that you replace 3 parts simultaneously for a long time.

Product Overview:
The material is forged from chrome-molybdenum steel for extra strength. (Some may not be forged)
Sunstars unique technology and equipment have been reduced to the extremes of measuring accuracy during heat treatment. High dimensional precision and strength.
Chrome Molybdenum Steel (SCM)
Excellent hardening and high abrasion performance. It also features a beautiful finish on the surface.
Special treatment is applied to the surface with a fine black iron oxide film. Greatly prevents material deterioration and rust.

Number of Teeth: 15
Chain Size: 428
Material: Chrome molybdenum steel.

Amazon.com Review

.