Material: duralumin Surface Preparation: Hard anodized aluminum treatment Intake Diameter:118mm Face Angle: 13.5 degree specification Weight: 151g
*For Model 4 (SEA5J), you need kick washers of Type 1-3. *In case of installing on Model 4 (SEA5J), you need kick washer, plain washer, nut and tools.
Because of the high rigidity of duralumin, there is very little flexing of the face itself when shifting gears, which contributes to an increase in maximum speed. Without fins, it will have a great performance at high RPM range due to the reduction of air resistance. The hard anodized surface of the face provides optimum belt grip and reduces slip loss even at high rpm, which is reflected in improved acceleration performance and maximum speed. Because of the reduction of rotational air resistance, the weight of the face can be designed heavier than with fins to get the maximum flywheel effect. By using duralumin, the strength of the spline part can be secured more than a normal face, and 0.6mm drop processing is done.You will be able to drop further to the low side. Unlike ordinary aluminum, duralumin is an alloy of aluminum, copper, etc., and has excellent heat conduction and heat dissipation properties. Since the angle is 0.5 degrees higher than the stock 14 degrees, the speed at the end of shifting will be increased. Since it is 0.5 degree higher than stock, you can expect the high gear effect until the end of shifting.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
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