和泉チエン Product Lineup

Introducing the track racing chain developed for top athletes in cycling, the 'IZUMI-V/-KAI'. The conventional bicycle track racing chain 'IZUMI-V' has received high praise from top athletes around the world for many years. The 'IZUMI-KAI' is an improved version based on the 'IZUMI-V', designed to have even less drive resistance. Both chains feature a unique technology that minimizes drive resistance. The power from pedaling is transmitted efficiently, resulting in effective pedaling force. 'IZUMI-V' - Experience a direct feel of the power transmitted from the pedals. - Decorated with a beautiful gold/black design. 'IZUMI-KAI' - Enjoy a smooth and light feel. - Decoration is eliminated, focusing solely on functionality. Both chains are developed for competitive use. Please select the chain that suits your style. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case study about the development of a chain that minimizes drive resistance, achieving a performance level among the fastest in the world. Our bicycle track racing chain, "IZUMI-V," has already received high praise from top athletes. However, in preparation for a world competition, we received a request for a chain with even lower drive resistance than the conventional model. To achieve this, it was necessary to apply a surface treatment to reduce the sliding resistance only on the inside of the bushing. If the entire bushing were surface-treated, we would not be able to maintain the necessary fitting force (interference fit) of the bushing. Since partial surface treatment was difficult, we applied a surface treatment to the entire bushing and then performed our proprietary treatment on the outside of the bushing. This unique process allowed us to successfully reduce sliding resistance by 20% while maintaining the required strength. The chain is available exclusively in gray. It is a product that thoroughly eliminates all non-essential decoration, focusing purely on functionality. 【Case Overview】 Request: A product that surpasses the conventional IZUMI-V. Challenge: It was necessary to reduce drive resistance while maintaining strength. Result: 20% reduction in sliding resistance. For more details, please download the PDF or feel free to contact us.

We will introduce a case where we conducted a study on the prototyping and mass production of a modular weight roller and resolved the issues. Due to its different shape compared to conventional designs and the assembly nature of the parts, there was limited knowledge from customers. Even at the prototyping stage, there were challenges such as warping during assembly and unstable dimensional accuracy due to variations in pressure input. Since an outer dimension tolerance of ±0.05mm was required during assembly, we proposed the creation of dedicated assembly jigs for each type of prototype and aimed to improve part accuracy. Although the required specifications were not met during prototyping, the variations were reduced to less than half of the initial levels, and there were no issues in the actual machines or durability test results. 【Case Overview】 ■Challenges - Even at the prototyping stage, there was warping during assembly, and dimensional accuracy was unstable due to variations in pressure input. ■Results - Although the required specifications were not met during prototyping, the variations were reduced to less than half of the initial levels, and there were no issues in the actual machines or durability test results. *For more details, please contact us.

In bicycle racing, even a slight difference in resistance can determine the outcome. To achieve higher speeds, it is important to efficiently convert pedaling power into propulsion. The track racing chain 'IZUMI-V/-KAI' addresses this challenge by reducing drive resistance. 【Usage Scenarios】 - Shortening time in track races - Improving pedaling efficiency - Competitors aiming to set new records 【Effects of Introduction】 - Improved transmission efficiency of pedaling power - Smooth and light riding feel - Possibility of setting personal bests