High-performance drivetrain integrated electric vehicles, heavy-duty cargo trikes, and specialized urban commuters engineered for global OEM distribution.
Strategic analysis of micro-mobility electrification, global torque demands, and supply chain re-engineering.
The global light electric vehicle (LEV) and cycling transmission industry is undergoing a structural paradigm shift. Driven by urban decarbonization mandates, the rapid proliferation of last-mile delivery logistics, and heightened consumer demand for high-efficiency electric power-assisted cycles (EPACs), the demand for robust, high-torque drivetrain gear systems has reached an unprecedented high. Modern bike gear assemblies are no longer passive mechanical chains; they are high-precision kinematic systems required to withstand instantaneous electric motor torque spikes ranging from 45 Nm in urban commuters up to 160 Nm in commercial cargo trikes.
Engineering transmission gears capable of handling continuous electrical power outputs from 250W to 5000W without tooth deformation or fatigue wear.
Standardized gear hubs, cassette interfaces, and internal planetary gearboxes designed for seamless multi-brand motor compatibility.
Strict adherence to European EN15194-2017 standards, ISO 4210 safety mandates, and North American UL certifications for commercial fleet compliance.
As international supply chains seek stability, cost competitiveness, and advanced metallurgic precision, China’s specialized gear and vehicle manufacturing hubs—specifically within the Tianjin industrial corridor—have emerged as crucial nodes for global procurement leaders. Importers, OEM brand owners, and logistics distributors require suppliers capable of providing not merely raw manufacturing capacity, but complete end-to-end metallurgical engineering, rapid prototyping, and verified compliance documentation.
Over 30 years of industrial mastery in electric power-assisted vehicles, specialized bike gear integration, and international OEM operations.
Tianjin Evergreen Vehicle Co., Ltd. stands as a premier Chinese manufacturer and global supplier specializing in the design, engineering, and mass production of high-performance electric power-assisted cycles (e-bikes), commercial cargo trikes, single-speed/multi-speed drivetrain assemblies, and micro-mobility vehicles.
Established with over 30 years of continuous industry experience, the company operates strategically expanded manufacturing facilities across China, complemented by overseas operational footholds and distribution partnerships across Europe and Asia. Our deep operational integration enables us to fulfill large-scale institutional orders, including contracts for supermarket delivery fleets, postal logistics networks, and municipal green transportation initiatives.
Over the past three years, we have expanded our footprint in Australia, Japan, and the European Union. With a well-established and efficient EU dealer network, we offer easy access to trial samples, localized spare parts, and fast delivery options.
Continuous investment in R&D ensures cutting-edge gear geometries, lightweight alloy frames, and robust electric propulsion systems. We are dedicated to pioneering green energy solutions that lower carbon footprints globally.
Top priority is assigned to component endurance. Gearboxes, cassettes, and structural frames undergo rigorous destructive and endurance testing to meet demanding operational environments worldwide.
From raw alloy tubes to heat-treated transmission gears: inside our high-precision production ecosystem.
Precision bike gear manufacturing requires strict alignment across metallurgical cutting, heat treatment, bending, and automated welding. Tianjin Evergreen’s automated workshops utilize CNC laser cutting and robotic welding lines to ensure mechanical tolerances within micro-scale thresholds. Below is an overview of our state-of-the-art facility processes:
High-Precision Laser Cutting
Heavy-Duty Shearing
Automated CNC Bending
Precision Pipe Cutting
Robotic Welding Stage 1
Robotic Welding Stage 2
Electrostatic Powder Coating & Spraying
Pioneering smart transmission tech, carbon-reinforced belts, and planetary gearboxes for the next decade of micro-mobility.
As the electric bike industry matures, transmission requirements are moving beyond conventional external derailleur systems toward fully sealed, low-maintenance internal gear hubs (IGH) and smart electronic gear shifting. Tianjin Evergreen’s R&D engineering team focuses on three key technological pillars:
Engineered for heavy cargo trikes and high-load utility bikes, our multi-speed planetary internal hubs protect gear trains from mud, water ingress, and mechanical impact. Featuring hardened Cr-Mo alloy steel gears treated with vacuum carburizing, these systems achieve over 95% mechanical efficiency with maintenance intervals exceeding 15,000 kilometers.
Replacing traditional steel chains, our high-precision polyurethane polyurethane-carbon fiber belt gear sprockets eliminate oil contamination, reduce drivetrain acoustic noise below 45 dB, and double operational lifespan, ideal for premium urban commuting e-bikes and shared fleet applications.
Integrating cadence sensors, wheel speed detectors, and torque sensors, our smart gearboxes execute automated gear shifts in under 100 milliseconds. This optimizes motor efficiency, prevents motor lugging, and extends battery range by up to 18% per charge cycle.
Why sourcing bike gears and assembled e-vehicles from Tianjin Evergreen offers unmatched competitive moat for global buyers.
Located in the heart of China’s bicycle and electric vehicle manufacturing cluster in Tianjin, we enjoy immediate access to high-grade steel tubing, aluminum alloy extrusion suppliers, specialized CNC tooling centers, and lithium battery assembly plants. This geographic cluster reduces raw component lead times by up to 40% compared to fragmented global setups.
By controlling laser cutting, pipe bending, dual-stage robotic welding, heat treatment, electrostatic spraying, and final drive gear assembly under one roof, we eliminate intermediate subcontractor markups and enforce 100% quality control traceability across every lot.
Whether modifying frame geometry for heavy-duty postal cargo trikes, altering gear ratios for mountainous terrains, or customizing brand aesthetics, our engineering team converts CAD drawings to functional samples within 14 working days.
To assist clients in mitigating geopolitical tariff risks and optimizing freight economics, Tianjin Evergreen leverages strategic partner manufacturing hubs across China, South Korea, Taiwan, Poland, Portugal, Bulgaria, and Hungary, enabling flexible cross-border logistics options.
Tailored drivetrain solutions for last-mile logistics, senior mobility, mountain sports, and municipal fleets.
Commercial heavy-load electric trikes fitted with ultra-low gear ratios and differential axle gearboxes. Perfect for urban postal services, courier fleets, and food delivery platforms requiring up to 350 kg payload capacity.
Low step-through e-scooters and comfortable 3-wheel electric trikes engineered with progressive automatic gear shifting, electronic braking systems, and ergonomic seating for safe, effortless mobility.
Luxury fat-tire e-bikes featuring wide-range multi-speed derailleur gear sets, high-torque hub/mid-drive motors, and corrosion-resistant gear finishes built to conquer soft sand, mud, and steep gravel paths.
Lightweight 700c Cr-Mo gravel bikes and high-efficiency city commuter e-bikes equipped with smooth index gear shifting, delivering high energy efficiency for daily city transport.
Full regulatory peace of mind with complete certification, EU warehouse stocking, and dedicated technical service.
Navigating dynamic global import regulations requires a manufacturing partner with deep compliance verification. Tianjin Evergreen simplifies international procurement by providing complete documentation packages for every shipment:
Answers to common B2B procurement, gear specification, and custom manufacturing inquiries.
Tianjin is China's premier bicycle and light electric vehicle manufacturing base. Sourcing directly from Tianjin Evergreen gives you access to a fully integrated industrial supply chain—from raw steel/aluminum processing to precision gear hobbing and automated assembly. This results in 20–30% cost savings, superior metallurgical quality control, and shorter production lead times.
Our bike gears, internal planetary gearboxes, and rear axle drive gears are built specifically for mid-drive and hub motors ranging from 250W to 5000W. We utilize high-tensile Cr-Mo steel alloys and specialized surface carburizing heat treatments to ensure long-term torque tolerance up to 160 Nm without tooth stripping or premature fatigue wear.
Yes. Our complete e-bike range holds official EN15194-2017 certificates verified by accredited international laboratories including TÜV Rheinland and SGS. Furthermore, all electronic components meet CE, UL, ROHS, and REACH standards required for hassle-free customs clearance and commercial fleet operation in the EU and North America.
We offer comprehensive OEM/ODM services including custom gear ratio engineering, specialized frame geometry development, custom branding and colorways, integration of proprietary battery/motor systems, and localized packaging solutions tailored to your destination market's legal standards.
Through our established EU dealer network and strategic European warehouse facilities, distributors can request evaluation sample units and fast-moving spare gear components directly from local stock, drastically reducing shipping times and sample evaluation costs.
Explore our full catalog of high-torque last-mile cargo trikes, gravel road cycles, BMX stunt bikes, and senior mobility scooters.
Tianjin Evergreen Vehicle Co., Ltd. is more than just a manufacturer—we are your strategic OEM/ODM partner committed to shaping the future of sustainable transportation through cutting-edge engineering and robust global supply chain efficiency.
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