As a professional carbon bike frame manufacturer with over a decade of experience in OEM/ODM services, we specialize in producing customized T700 carbon fiber frames for global brands, distributors, and cycling enthusiasts. Our expertise lies in transforming technical specifications and design visions into high-performance bicycles through advanced materials engineering and precision manufacturing. This article explores our methodology for creating unique T700 frames, the advantages of this material, and the key steps in our production process.
Why T700 Carbon Fiber?
T700 carbon fiber, classified as a high-tensile-strength carbon fiber with a tensile strength of 4,900 MPa and a modulus of 230 GPa, offers an optimal balance of durability and lightweight properties. Compared to standard T300 or higher-grade T800 materials, T700 provides cost-effective solutions without compromising structural integrity. Its vibration-damping characteristics make it ideal for endurance road bikes, gravel bikes, and entry-level racing frames. We utilize unidirectional (UD) and woven T700 fabrics to achieve specific stiffness-to-weight ratios while maintaining impact resistance.
Our material selection process involves rigorous testing of resin systems, including epoxy matrices compatible with T700 fibers. By optimizing the fiber-resin ratio (typically 60:40), we ensure maximum load transfer efficiency and fatigue resistance. This approach meets international standards such as EN 14766 for bicycle frames and ISO 4210 for safety requirements.
Custom Design Workflow
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Client Consultation & Technical Briefing
The process begins with detailed discussions about the client’s target market, performance requirements, and aesthetic preferences. We analyze factors such as rider geometry, intended use (road, mountain, or hybrid), and budget constraints. For example, a gravel bike may require wider tire clearance and enhanced torsional stiffness, while a time-trial frame prioritizes aerodynamic efficiency. -
3D Modeling & Finite Element Analysis (FEA)
Our engineering team uses CAD software to create frame geometries tailored to the client’s specifications. FEA simulations identify stress concentrations and guide the placement of T700 plies in high-load zones. Critical areas like the bottom bracket shell and head tube receive additional reinforcement, while non-critical regions are optimized for weight reduction. -
Prototype Development
A hand-crafted prototype is produced using CNC-machined molds. This phase allows clients to test ride the frame and request adjustments to geometry, tube shapes, or integration features (e.g., internal cable routing). We typically complete 2-3 iterative revisions before finalizing the design. -
Mold Manufacturing
Production-grade aluminum molds are fabricated with precision tolerances of ±0.05mm. Surface treatments ensure smooth carbon layup and consistent finish quality. Complex shapes, such as integrated seat masts or asymmetrical chainstays, require multi-piece molds to facilitate demolding.
Advanced Manufacturing Techniques
Our factory employs automated fiber placement (AFP) machines alongside manual layup processes to ensure accuracy and flexibility. The T700 plies are cut using laser-guided systems, reducing material waste by 15% compared to traditional methods. Key steps include:
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Layup Orientation: We strategically align T700 fibers at 0°, 45°, 90°, and ±30° angles to control flex patterns. For instance, 0° plies enhance longitudinal stiffness, while ±45° layers improve torsional rigidity. -
Vacuum Bagging & Autoclave Curing: Frames are cured under 0.6MPa pressure at 120°C for 90 minutes, ensuring complete resin impregnation and minimal void content (≤1% as per ASTM D3044). -
Post-Curing Machining: CNC machining achieves precise dropout alignment (±0.1mm tolerance) and bottom bracket threading.
Quality Assurance & Testing
Every frame undergoes multi-stage inspections:
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Non-Destructive Testing (NDT): Ultrasonic scans detect internal voids or delaminations. -
Destructive Testing: Random samples are subjected to static load tests exceeding EN 14766 requirements by 20%. -
Surface Inspection: A 100% visual check ensures paint quality and alignment with client specifications.
We also offer optional certifications such as UCI approval for racing frames or CE marking for European markets.
Customization Capabilities
Beyond structural design, we provide:
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Color & Decal Options: From matte to glossy finishes, with UV printing for complex graphics. -
Integrated Components: Hidden water bottle bosses, dropper post compatibility, and electronic shifting ports. -
Brand-Specific Logos: Laser engraving or embedded carbon patches for OEM branding.
Clients receive full technical documentation, including CAD files, material test reports, and assembly guidelines.
Sustainability Practices
Our facility implements a closed-loop resin system to reduce chemical waste by 40%. Offcuts from T700 fabric are repurposed into lower-stress components like seat stays or cosmetic covers. We also partner with third-party recyclers to process production waste.
Why Choose Our OEM Services?
With 15+ years in the industry, we serve over 80 brands across 30 countries. Our advantages include:
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Scalable Production: MOQ as low as 20 frames per order, with batch sizes up to 5,000 annually. -
In-House R&D: A dedicated team continuously experiments with hybrid materials (e.g., T700 + aramid fiber) to enhance impact resistance. -
End-to-End Support: From initial sketches to shipping logistics, we minimize time-to-market for clients.
By combining T700’s mechanical properties with our technical expertise, we deliver frames that balance performance, cost, and reliability. Whether launching a new brand or expanding an existing product line, our manufacturing process ensures your vision becomes a rideable reality.
References:
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Global Composites Industry Report, 2023 -
ISO 4210 Bicycle Safety Standards Handbook -
Carbon Fiber Reinforced Polymer Applications in Cycling, Journal of Materials Engineering”