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Quality & Warranty

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Ningbo Shenglu Bicycle Co., Ltd.

Quality & Warranty

Quality does not depend on final inspection before shipment. It is the result of a stable manufacturing system with controllable processes and clear verification procedures.


At Shenglu, quality management runs through our entire in-house production process, ensuring consistent, reliable and long‑term stable performance of our products.

  • Equipment
  • Equipment
  • Laboratory
  • Laboratory
  • Laboratory
  • Laboratory

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Quality Management Approach

Quality control covers all key stages including raw material preparation, processing, surface treatment, assembly and final inspection.
We focus more on reducing batch variation through process control and standardized management, rather than relying on single inspection methods.

Quality Inspection and Verification

To ensure that products meet functional and application requirements, we carry out appropriate quality inspection and verification at different stages of production.
Depending on product categories and application scenarios, relevant inspections and verifications may include:
----Dimensional and assembly accuracy inspection
----Functional performance verification
----Structural load and durability evaluation based on application scenarios
----Surface treatment consistency and corrosion resistance testing
Quality inspection and verification are implemented throughout the production process, not just limited to the pre-shipment stage, to support consistent quality in mass production.

Consistency Between Samples and Mass Production

Quality is not equivalent to "qualified samples".
We also attach great importance to:
----Repeatability of processes
----Stability of long-term mass production
----Consistency between samples and mass-produced products
to ensure that the samples confirmed by customers truly reflect our mass manufacturing capability.

Warranty Policy

The standard warranty period is 2 years, applicable to quality issues caused by manufacturing or material defects under normal usage conditions.
Warranty support is provided in accordance with a clear process:
----Problem confirmation and information recording
----Technical evaluation based on production data
----Correction or replacement solutions implemented according to liability attribution
Through clear definition of responsibilities, we achieve efficient handling and continuous improvement.

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