Buy Original SUNSTAR：Rear Sprocket Duralumin 390DUKE

Product Detail

Specification

[Number of teeth] 45
[Usage] For Rear
[Compatible chain size] 520
[Material] Super duralumin (A7075-T6)
[Weight] Approx. 1/3 of steel (stock etc.)
[Color] Champagne Gold
[Specification]
Surface Preparation: hard anodized aluminum
Durability: 10000km-20000km

Description

[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.

Note

Sprocket Course - Basics - Frequent maintenance is the secret to riding your bike for a long time!SUNSTAR

Sprocket Course - Application - Change the number of teeth to make your bike life even more fun!SUNSTAR

* The image is only for reference. The image shown may differ from the actual product.

Caution

*The fitment of the sprocket does not guarantee the fitment of other than the same size (number of teeth and chain size) as the stock sprocket.
*When changing the number of sprocket teeth or chain size, be careful not to interfere with the surrounding parts.
*Installation requires setting according to the vehicle body.Please consult with a shop with sufficient knowledge and equipment.
*The stock size chain cannot be used on vehicles that are set up for conversion, and must be converted to the correct chain size.
*The color and shape of the delivered product may differ from the picture.
*If you change the number of sprockets from the stock, it may not be able to be installed on some models.
*Durability is for reference only.It depends on your riding style, chain size and maintenance condition.
*Offset figures are for sprockets only.
*The actual offset of the chainline from the stock value will vary from model to model.Please note that if the stock sprocket has an offset, that value will be subtracted.(It depends on each model)
*Not all of the available tooth numbers can be installed without interference to the vehicle body.Please confirm the installation of each vehicle body according to the number of teeth by yourself.
*There may be changes in product specifications due to the manufacturer's reasons.