[Proud and noble finish REAR ALUMINIUM]
■Feature 1: Long life of the drivetrain system brought about by high precision
Because sprockets require roundness due to their characteristics, Sunstar processes the inner diameter, pattern hole, mounting hole, and teeth in this order.
This process makes it as close to a perfect circle as possible.
(See how to build a sprocket)
As a result, the high-precision sprockets minimize not only the wear of the sprockets, but also the wear of the chain.
■Feature 2: Aluminum Reason and Made in JAPAN
The highest strength aluminum alloy "Super Duralumin (A7075-T6)" is used.
The weight is about 1/3 of the weight of stock iron.
The sprocket that rotates at high speed should be as light as possible to reduce friction loss, and as a result, fuel consumption and acceleration will be improved.
All of the materials are made in Japan, and all of the production processes are done in Japan.
Sunstar is a purely Japanese product.
■Feature 3: Meticulous surface treatment and luxurious color
Sunstar uses "hard anodizing" to increase the durability of the sprocket.
It is about 1.5 times more durable than general anodized aluminum, which is only used to prevent corrosion (Sunstar comparison, average value).
It also prevents the color from fading due to ultraviolet rays.
The natural champagne gold color of the hard anodized aluminum also gives it a chic and luxurious finish.