Custom Bicycle Parts Manufacturer
Bicycle Parts
China Simis Company is an experienced OEM custom manufacturer of Casting and Forging Metal Bicycle Components, serving the full range of the cycling market from high-performance racing to heavy-duty utility. Our product range includes cranks, stems, hubs, chainrings, dropouts, and brake components.
We select the optimal manufacturing process and material based on the component's function: Precision Aluminum Forging is utilized for high-end, lightweight components requiring maximum fatigue strength, while Investment Casting (Steel/Stainless Steel) provides durable, cost-effective solutions for complex shapes and high-wear parts. Our manufacturing expertise spans from Cold Forging for high-precision spindles to Closed Die Forging for high-strength crank arms and Pressure Die Casting for ergonomic pedal bodies. Utilizing materials like 6000/7000 Series Aluminum, Alloy Steel, and Stainless Steel, we ensure every component withstands the rigors of both competitive racing and rugged off-road environments. Our focus is on delivering certified fatigue life, durability, and critical dimensional precision across all product lines.
What are the different categories of bicycle parts?
We categorize our bicycle parts manufacturing based on the component's function and the specific mechanical demands placed upon it, allowing us to select the optimal process and material for each category to ensure superior performance and durability in real-world cycling scenarios.
| Component Category | Examples | Primary Function Requirement | Ideal Simis Process/Material |
| Drivetrain Components | Cranks, Chainrings, Pedal Bodies, Freehub Shells | High Torsional Fatigue, Wear Resistance, High Contact Stress. | Forged Aluminum/Alloy Steel (Cranks), Cast/Forged Steel (Chainrings, Pedal Axles). |
| Steering & Control | Stems, Handlebar Clamps, Fork Dropouts | Bending Strength, Critical Precision Clamping, Impact Toughness. | Forged Aluminum (7075) for stems; Cast Steel/Aluminum for fork crowns/dropouts. |
| Braking Systems | Caliper Bodies, Brake Arms, Hydraulic Levers, Mounts | Safety-Critical, High Rigidity, Corrosion Resistance. | Forged Aluminum (Levers/Calipers) for light weight; Investment Cast Steel for caliper mounts/small arms. |
| Frame & Utility Interfaces | Frame Dropouts, Rear Suspension Links, Racks/Mounts | Structural Strength, Weldability, Precision Alignment. | Cast Steel/Stainless Steel (Dropouts), Forged Aluminum/Steel (Linkages). |

What manufacturing processes are used to produce high-quality bicycle parts?
We leverage both casting and forging to meet the diverse requirements for strength, complexity, and cost across different bicycle components, with each process tailored to match the functional demands of specific parts.
| Manufacturing Process | Component Focus | Material Focus | Key Advantage for Bicycle Performance |
| Cold Forging | Pedal Spindles, Bottom Bracket (BB) Axles, Seatpost Bolts. | Alloy Steel, Carbon Steel. | Ultimate Surface Hardness. Achieves exceptional dimensional precision and thread strength without the need for heat treatment distortion. |
| Precision Closed Die Forging | Crank Arms, Stem bodies, Suspension Linkages. | Aluminum Alloy (6061/7075), Alloy Steel. | Superior Grain Flow. Aligns the internal metal structure to the shape of the part, providing maximum fatigue resistance and safety. |
| Pressure Die Casting | Pedal bodies, Brake levers, Derailleur cages. | Aluminum Alloy, Zinc Alloy. | Lightweight Complexity. Ideal for producing intricate, ergonomic shapes in high volumes with minimal post-processing. |
| Investment Casting (Lost Wax) | Specialty frame lugs, Dropouts, high-end vintage-style components. | Stainless Steel, Chromoly Steel. | Intricate Detail. Perfect for complex, one-piece structural parts that require a premium surface finish and high corrosion resistance. |
| Precision CNC Machining | Lightweight Sprockets, Disc Brake Hubs, Derailleur Pulleys. | Aluminum Billet, Stainless Steel. | Aesthetic & Functional Precision. Enables the removal of excess material for "hollow" designs while maintaining tight bearing tolerances. |
| Sheet Metal Fabrication | Chain guards, Mudguard stays, Battery enclosures (E-bikes). | Aluminum, Stainless Steel. | Efficiency & Flexibility. Provides lightweight protective solutions and structural mounting for utility and electric bikes. |
| Surface Treatment (Anodizing) | Cranks, Hubs, Rims, Pedals. | Aluminum Alloy. | Wear & Corrosion Resistance. Increases surface hardness while providing the vibrant, durable colors required for the premium cycling market. |


What Materials Are Used for Bicycle Parts to Balance Weight and Wear Resistance?
We provide solutions utilizing both lightweight aluminum for performance and high-strength steels for durability and wear resistance, ensuring each material is matched to the specific functional requirements of different bicycle components.
| Material Type | Core Performance Attributes | Primary Bicycle Application |
| Aluminum Alloy (6k/7k) | High Strength-to-Weight. Corrosion resistant and highly aesthetic when anodized. | Crank Arms, Rims, Frames, and high-end Pedal bodies. |
| Alloy Steel (Chromoly) | Exceptional Toughness & Fatigue Life. Ideal for high-stress cyclic loading. | Pedal Spindles (Axles), high-strength bolts, and fork steerers. |
| Stainless Steel | Rust-Proof & High Shine. Excellent durability in wet/muddy conditions. | Disc Brake Rotors, bearings, spokes, and premium frame lugs. |
| Carbon Steel | High ductility and reliable strength for mass-market components. | Standard hub axles, kickstands, and basic pedal cages. |

What Quality Assurance and Cyclical Fatigue Testing Measures Are Applied to Bicycle Parts?
All components are manufactured and tested to meet industry safety standards, prioritizing the structural integrity of parts under constant cyclical stress, with a comprehensive set of testing and verification processes to ensure product reliability.
·Fatigue Endurance Testing:
Critical load-bearing components (Cranks, Stems) undergo ISO 4210 or comparable cyclical testing to verify lifespan under repeated high loads.
·Dimensional Certification:
CMM (Coordinate Measuring Machine) verification of bearing interfaces, threading, and clamping surfaces is performed to eliminate wobble and ensure precision fitment.
·Structural Soundness (Casting):
Investment cast steel parts are checked via NDT (Non-Destructive Testing) to ensure freedom from internal defects that could compromise structural integrity.
·Material Integrity:
Chemical analysis and mechanical property testing confirm the strength and temper (T6 for Aluminum, Hardness for Steel) of the finished product.
What Are the Key Applications for Simis Custom Bicycle Parts?
Our components serve specialized needs across the entire cycling ecosystem, with customized solutions designed for the unique demands of different cycling scenarios and market segments.
·Road Racing & MTB:
High-end, lightweight Forged Aluminum components designed for competitive performance and extreme fatigue resistance.
·E-Bikes (Electric Assisted):
Heavy-duty Forged Steel/Alloy Steel components engineered to handle the increased weight, motor torque, and higher speeds associated with electric assistance.
·Urban & Commuter:
Durable Cast Steel and Forged Aluminum parts designed for all-weather reliability and long service life.
·Logistics & Utility:
Robust components for cargo bicycles and specialized delivery fleets, requiring maximum load capacity and toughness.
| Application Sector | Typical Component | Simis Process Focus |
| Professional Racing | Ultra-light Forged Cranks, CNC Hubs | Closed Die Forging / 5-Axis CNC. |
| E-Bike & Mobility | Mid-drive Motor Housings, Battery Brackets. | Pressure Die Casting / Fabrication. |
| Mountain/Downhill (MTB) | Heavy-duty Pedals, Suspension Links. | Cold Forging / Ductile Iron (specialty). |
| City & Lifestyle | Standard Pedals, Kickstands, Chain Guards. | Die Casting / Sheet Metal. |

What Are the Advantages of Simis OEM Custom Manufacturing Bicycle Parts?
By utilizing both casting and forging, Simis provides the optimized solution for performance, durability, and cost, with core advantages that address the key pain points of bicycle component customization and production.
·Process Optimization:
We combine the superior fatigue resistance of Forging (for primary stress components) with the geometric complexity and wear resistance of Casting (for brackets and chainrings), ensuring cost-effective design.
·Tailored Material Selection:
We match the material (e.g., 7075 Aluminum, 4140 Alloy Steel) and process to the specific function—prioritizing Strength-to-Weight for racing and Wear Resistance/Toughness for utility.
·Integrated CNC Finishing:
Our multi-axis CNC machining ensures that whether the blank is cast or forged, the critical interface tolerances (e.g., bottom bracket shell, hub bearing seats) are maintained to the highest degree of precision.
·Certified Safety Standards:
We adhere to relevant international safety and durability standards (ISO 4210) across both our forged and cast product lines, ensuring maximum confidence in component safety.

How to Get a Quote for Custom Cast & Forged Bicycle Parts?
China Simis Company is your expert global partner for custom casting and forging metal bicycle components, engineered for certified safety, superior strength, and precision across all market segments. To obtain a detailed and accurate quotation for your custom bicycle component project, please submit the following technical documents and requirements to our engineering department: 2D technical drawings or 3D CAD models, specific component type, required ISO fatigue test standard, target material (Aluminum alloy or Steel), weight/cost objectives and expected production volume. Our professional engineering team will review your requirements promptly and provide a comprehensive quotation including unit price, production lead time, quality assurance standards and delivery terms.