Seven-Speed Steel Spiral Bike Gear Perfect for Daily Commuting and Mountain Biking

What are the characteristics of Seven-speed bicycle gear?

The seven-speed gear system on bicycles is a popular choice for urban commuting, recreational rides, and light mountain cycling. It's a common component that helps you tackle various terrains with ease.

Advantages

Core Functions: The speed change function allows you to adjust the front and rear gears, changing the transmission ratio to suit different riding needs. When tackling hills or headwinds, opt for a higher gear ratio to ease pedaling. For flat or downhill stretches, switch to a lower gear ratio to pick up speed. This setup adapts to various road conditions, whether you're navigating city streets or light mountain trails, enhancing your cycling experience.

Technical Features: The rotary flying system, commonly found in seven-speed bicycles, offers a simpler structure compared to the locked flying system, making it ideal for beginners. With fewer gears, the wear and tear on chains and gears is minimized, resulting in lower maintenance costs and easier upkeep.

With its affordable price, ease of operation and adaptability to daily riding needs, the seven-speed bicycle gear is ideal for urban commuting and short-distance riding.

Why choose us?

Since 1994, we've been dedicated to producing top-notch internal bevel and custom gears. With over 30 years of expertise, we follow strict ISO 4-6 standards. Quality is our number one priority, and each gear is carefully crafted for reliability and durability. We're confident that our customized, high-quality solutions will exceed your expectations and perfectly fit your needs.

Our team includes a doctoral-degree holder, a respected member of the China Gear Standardization Technical Committee, and a graduate student specializing in bevel gear research.

We're proud of our advanced CNC seven-axis, five-linkage spiral bevel gear grinding and milling machines in our factory. We also have a full suite of cutting-edge production and testing equipment to ensure every product meets the highest standards of quality and efficiency.

Our company was formerly known as Changsha Double Star Gear Industrial Co., Ltd, which was established in 1994. It is a directly affiliated university-run enterprise founded by Central South University Professor Zeng Tao, the leading expert on spiral bevel gears in China. It was later renamed as Changsha Senjie Gear Co., Ltd (abbreviated as "CSG") in 2016. CSG is a production R&D base specializing in professional design, reserch, manufacture and sales of high-quality small module spiral bevel gears and high reduction hypoid gears and cylindrical gears. In 2023, Hunan Dinghan New Material Technology Co., Ltd. was established as a specialized international export business department. CSG has strong scientific research and development capabilities and is also equipped a full set of advanced equipment including seven-axis five-linkage CNC spiral bevel gear grinding machines and gear milling machines. By making the best use of the scientific and technological achievements and equipment of the Gear Research Institute of Central South University, machanical processing, heat treatment and testing. We have developed high-quality products featuring high reduction, high speed, heavy load, low noise and less teeth for users.

With the quality policy of "scientific and technological innovation, quality first, being first-class firm and customer‘s satisfaction", we have won the trust of well-known domestic and abroad enterprises with stable and excellent quality. It is committed to be a pioneer of the industry of China's small-module spiral bevel gears, and is dedicated to providing service for any related industry requiring industrial robots, CNC turning and milling compound power tool turrets, industrial sewing machines, reducers, bicycles, power tools and aeromodelling. We sincerely look forward to your cooperation!