Explore our core lineup of certified electric mobility products, built with robust frame kinematics and advanced structural integrity.
In the rapidly evolving world of e-mobility, the electric bike rear swingarm serves as the mechanical backbone for dual-suspension, high-performance urban commuters, and cargo delivery vehicles. Far beyond a simple structural linkage, the swingarm directly dictates vehicle kinematics, lateral stiffness, suspension curves, and how rotational torque from the drive unit—whether a hub motor or mid-drive motor—is transferred to the chassis.
Aurora Electric Vehicle (Shandong) Co., Ltd. has spent over a decade refining the materials, geometry, and manufacturing techniques of high-strength rear swingarms. By optimizing structural load-bearing parameters, utilizing advanced Finite Element Analysis (FEA), and executing strict welding standards, we ensure that every rear swingarm provides high torsional rigidity, resists mechanical fatigue, and safely handles up to 120Nm of sudden torque inputs.
Standardized metrics that support our premium production systems, certified under global quality assurance models.
Modern rear swingarms are generally fabricated using either high-tensile structural steel (Q235/Q345 grades) or aviation-grade 6061-T6 aluminum alloy. Steel swingarms offer high cost-efficiency and natural flex characteristics suitable for heavy-duty cargo e-bikes, while aluminum options reduce unsprung weight, providing responsive shock absorption, better battery range, and excellent anti-corrosion properties.
Rear hub motors exert intense, direct torque profiles on dropouts. Dynamic lateral loading during high-speed cornering causes frame flex, resulting in bearing wear and rotor rubbing. By developing reinforced box-section profiles and forged 3D dropout plates, we maintain wheel alignment under peak operating limits and ensure high structural reliability.
A quality rear swingarm is defined by its suspension pivot design. Utilizing double-sealed cartridge bearings and oversized pivot axles maintains smooth rotation over thousands of kilometers. Correctly calculated anti-squat values prevent chain growth and pedal bob, allowing high motor power to translate into forward momentum without losing energy.
Global sourcing partners in Europe, North America, and Australia look for manufacturers capable of scaling volume while maintaining strict dimensional accuracy. B2B buyers require detailed certifications and transparent production workflows.
Aurora EV integrates these B2B requirements into our core production workflows, offering a reliable choice for international OEM clients seeking quality consistency.
Our production facility is certified to meet international criteria, including CE, CCC, FCC, and global standard testing protocols.
Founded in 2015, our electric vehicle manufacturing facility is located in Linyi City, Shandong Province—a key logistics and transportation hub linking the Yangtze River Delta and the Bohai Economic Circle. Over the last decade, we have transitioned from a localized frame assembly shop to an integrated manufacturer covering R&D, precision metal cutting, frame fabrication, painting, final assembly, and international sales.
In 2019, with the release of China's New National Standard for electric bicycles, we completed a facility-wide upgrade. We rebuilt our production lines to enforce structural safety, flame retardancy, speed limits, and tamper-resistant electronics. Our facility features digital welding cells, automated assembly paths, and comprehensive testing rooms to ensure that every frame and rear swingarm meets international standards.
We are driven by a commitment to build reliable vehicles. Every chassis undergoes heavy load, waterproof, fire safety, and battery management stress tests to ensure reliable, long-term performance.
Custom swingarm designs and vehicle configurations tailored to commercial and consumer mobility sectors.
Optimized for lightweight, maneuverable commuter e-bikes. Features thin-walled, high-strength aluminum profiles that reduce unsprung mass for a smoother ride over city streets and obstacles.
Designed to withstand heavy constant payloads. Utilizes reinforced steel alloy box-sections and thick dropout plates to prevent structural bending under heavy, off-center luggage loads.
Features wide tire clearance and high lateral stiffness. Forged yoke components allow fitting tires up to 4.8 inches while maintaining normal chainlines and clearance around the motor housing.
Industrial scale combined with professional management structures drives our product consistency.
Our engineering team includes senior designers and manufacturing specialists with extensive industry experience. We focus on vehicle kinematics, battery life optimization, and structural fatigue validation. We use advanced 3D CAD modeling and FEA tools to simulate real-world mechanical loads, and hold several design patents in hub motor integration and frame design.
Our production floor relies on trained, skilled assembly workers and strict QA supervisors. We manage every step, from checking incoming steel and aluminum stock to inspecting raw welds and verifying final assembly tolerances. Our quality control gate checks that every critical dimension meets specification before vehicles move to final packaging.
Our sales and engineering services provide one-stop customized OEM/ODM options. We help global clients navigate component selection, custom branding, packaging design, and container load optimization, ensuring smooth delivery from our Linyi hub to your warehouse doors.
Integrating Shandong’s history of heavy machinery manufacturing with a focus on modern green travel, our core values are "integrity, pragmatism, innovation, and mutual benefit." Our mission is to make micro-mobility reliable, safe, and accessible.
Looking ahead, we are investing in robotic welding, environmentally friendly automated painting lines, and smart vehicle testing. We invite distribution and manufacturing partners from around the world to visit our Linyi facility, discuss collaborative engineering projects, and build long-term OEM relationships.
See how our integrated rear-suspension frames perform in real-world environments.
Designed for clean integration and low maintenance, featuring a lightweight aluminum alloy swingarm optimized for daily city commutes.
Designed for durability under high acceleration, with a steel-reinforced swingarm that handles rear-motor torque loads.
Have a specific chassis requirement? Our Linyi R&D engineering team can custom design, model, and prototype swingarms tailored to your motor width, suspension curve, and wheel standards.
Consult Our EngineersImplementing robotic MIG and TIG weld fixtures to increase consistent penetration depth and eliminate structural variation in steel/aluminum swingarm seams.
Expanding the use of 3D forged joints to minimize welding requirements around high-stress areas near the bottom bracket pivot.
Developing split-swingarm frames to allow easy belt installation and integration with mid-drive gearboxes for high-end commuter markets.
Researching embedded strain sensors and smart speed sensors in swingarm dropouts to monitor structural health and improve safety diagnostics.
Technical answers to common B2B procurement and engineering questions.
The swingarm manages both suspension motion and motor torque loads. Rear hub motors transfer torque directly to the frame dropouts. If the swingarm lacks sufficient lateral stiffness, this torque can cause axle twist, wheel misalignment, and brake rub. For mid-drive motors, a rigid swingarm is critical to maintain correct chain or belt tension during suspension travel.
We offer both high-strength structural carbon steel (Q345B) and aviation-grade aluminum alloy (6061-T6). Aluminum reduces unsprung weight for performance commuter bikes, while steel provides high durability and cost-efficiency for utility, three-wheelers, and heavy-cargo models.
Every swingarm design undergoes dynamic stress simulations using FEA software, followed by physical tests on a custom rig. We subject the frames to over 200,000 load cycles under vertical and lateral force vectors. Welds are also checked for micro-cracks using non-destructive inspection methods.
Yes. We offer comprehensive ODM services. Customers can provide custom drawings or specify hub spacing (e.g., 135mm, 170mm, or 197mm for fat bikes), pivot locations, shock mounts, and braking standards (flat mount or post mount). Our engineering team will optimize these specifications for manufacturing.
We package frames using 5-layer imported kraft cardboard cartons with custom-molded high-density foam inserts to prevent shipping damage. Pivot bearings are pre-greased and protected with plastic caps, ensuring the frames arrive ready for your final assembly line.
All steel swingarms undergo an acid pickling process to remove scale and rust, followed by electrophoretic deposition (EPD) to apply an anti-corrosion primer. We then apply an electrostatic powder coat, which protects the steel from road salt, moisture, and debris.
Browse our extended product lineup, featuring certified electric vehicles built for urban commuting, heavy delivery, and off-road applications.
Browse our full catalog of specialized electric bicycles, scooters, and recreational vehicles.
