Kaihong Bicycle Carbon cord Timing Belt is developed for bicycle drive systems that require clean transmission, stable power delivery, and reduced maintenance compared with conventional metal chains. The CHT Series combines HNBR rubber, twisted carbon fiber tensile cords, and a wear-resistant nylon tooth surface in a one-piece molded structure. With transmission efficiency of ≥98%, low elongation, and lubrication-free operation, it is suitable for e-bikes, urban commuter bicycles, internal-gear bicycles, mountain bikes, and lightweight road bikes.
Unlike steel chains that require regular lubrication, the Bicycle Carbon cord Timing Belt operates without chain oil. Its dry-running design helps prevent grease from accumulating on the frame, wheels, or rider's clothing while reducing the need for routine cleaning.
The carbon fiber tensile core maintains dimensional stability under repeated pedaling and higher torque. Combined with accurate tooth engagement, the belt provides consistent power transmission during acceleration, climbing, and long-distance riding.
The rubber-based construction eliminates metal-to-metal contact found in conventional chain drives. This creates a quieter drivetrain, particularly valuable for urban commuting, residential areas, and premium bicycles where riding comfort is an important consideration.
| Type | Pitch | Toott height | Thickness | |
| H8M | 8mm | 3.38±0.2mm | 5.5±0.6mm | |
| 8MGT | 8mm | 3.43±0.2mm | 5.5±0.6mm | |
| H11M | 11mm | 5.0±0.2mm | 7.5±0.6mm | |
| H14M | 14mm | 6.02±0.2mm | 9.5±0.6mm | |
| G14M | 14mm | 6.0±!0.2mm | 9.5±0.6mm | |
The twisted carbon fiber tensile cord provides high tensile strength with extremely low permanent elongation. It helps maintain the original tooth pitch and transmission geometry when the bicycle is subjected to sustained pedaling loads.
The HNBR matrix provides resistance to heat, oil, ozone, and environmental aging. This allows the belt to remain flexible and stable during outdoor commuting and changing riding conditions.
A wear-resistant nylon fabric is applied to the tooth surface to reduce friction against the pulley and limit tooth wear. This construction supports smoother engagement and contributes to longer operating life.
The composite construction reduces the dependence on heavy metal links while maintaining the strength required for bicycle power transmission. Lower drivetrain mass can contribute to a more responsive riding feel during acceleration and climbing.
The rubber body provides a degree of flexibility and shock absorption that helps moderate instantaneous impacts from uneven roads and high-torque pedaling. This gives the drivetrain a smoother operating character than a rigid metal chain system.
According to the supplied product data, the CHT Series is designed for approximately 15,000–20,000 km of riding, with a claimed service life of 3–5 times that of standard bicycle chains under comparable conditions. This can reduce replacement frequency and after-sales maintenance requirements.
For bicycle manufacturers and distributors, selecting the correct belt is not only about tensile strength. The pulley tooth profile, belt width, center distance, required belt length, operating torque, and bicycle usage conditions should all be considered together.
For OEM projects, Kaihong can evaluate the required transmission conditions and recommend a suitable CHT Series specification. Buyers can provide an existing sample, pulley dimensions, technical drawing, or target belt length for matching. This approach helps reduce compatibility problems during prototype development and bulk production.
The dry-running design changes the routine maintenance requirements of the drivetrain. Riders do not need to apply chain lubricant or repeatedly clean oil-contaminated components. Instead, maintenance can focus on checking belt appearance, tooth condition, pulley alignment, and overall transmission tension.
For bicycle brands, this simplified maintenance routine can also reduce after-sales service requirements. The supplied application case reported that maintenance-related complaints decreased by 70% after switching from conventional chain systems to the CHT Series, providing a useful reference for manufacturers evaluating total ownership costs.
The Bicycle Carbon cord Timing Belt is intended for belt-drive bicycles across different riding scenarios. It can be used on urban e-bikes, lightweight commuter bicycles equipped with internal gear hubs, moderate off-road mountain bikes, and high-end road bicycles where quiet and efficient transmission are priorities.
For bicycle manufacturers, it can serve as an OEM drivetrain component. For distributors and bicycle workshops, it can also be supplied as a replacement or upgrade solution for compatible belt-drive systems.
A European urban e-bike manufacturer developing a 2025 eight-speed internal-gear commuter model selected the CHT Series after sample evaluation and road testing. The project involved an order of 15,000 belts for factory assembly.
The bicycles were tested through year-round outdoor commuting, including rain, mud, and low winter temperatures. During 12 months of real-world testing, the supplied case reported zero elongation failures and no maintenance requirements, while drivetrain-maintenance complaints decreased by 70% compared with models using conventional chains.
Kaihong manufactures the CHT Series under ISO9001 and ISO14001 management systems. Precision one-piece molding is used to control tooth pitch and ensure consistent engagement with matching pulleys. The company supports OEM and wholesale orders with customization for belt length, brand/logo printing, and specialized tooth profiles.
For project inquiries, buyers can provide the existing belt, pulley information, required belt length, or bicycle model. This allows the appropriate belt specification to be evaluated before bulk production.
The CHT Series is designed as a direct replacement solution for compatible belt-drive bicycle frames and pulley systems. It is suitable for both OEM installation and aftermarket replacement where the bicycle drivetrain is designed for belt transmission.
The twisted carbon fiber tensile cord is designed for extremely low elongation and dimensional stability under continuous high-torque operation. The supplied road-test information reports no permanent elongation or deformation during prolonged heavy-load riding.
The supplied specifications state that the HNBR construction is suitable for rain, mud, and urban dust, with an operating temperature range of approximately -30°C to 120°C.
Yes. Kaihong supports bulk wholesale and OEM customization, including belt length, brand/logo printing, and specialized tooth-profile development.
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No. 48 Guangming Middle Road, Sanmen County, Taizhou City, Zhejiang Province, China
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