Folding Bike

Commercial Folding Bicycle: OEM/ODM B2B Product Specification & Sourcing Guide

Product Overview This commercial-grade folding bicycle is engineered for urban mobility fleets, corporate leasing programs, and regional brand distribution. Built around a 6061-T6 heat-treated aluminum alloy frame, the platform balances structural rigidity with a target weight of 11.5 kg. The dual-safety folding hinges utilize CNC-machined locking levers designed to prevent accidental release under dynamic torsional loads. Standardized around 20-inch wheel geometry, the architecture accommodates standard replacement tires, tubes, and drivetrain elements to minimize fleet maintenance overhead.

Multi-Speed Folding Bike

The M-Series Multi-Speed Folding Bicycle serves transit fleet operators, municipal micro-mobility systems, and regional brand distributors requiring high structural durability under intensive daily

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24-Inch Folding Bike

The 24-inch folding bicycle bridges the functional gap between compact small-wheel platforms and the ride stability of standard adult commuter geometries. Built around a rigid main triangle and an

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20-Inch Folding Bike

This 20-inch folding bicycle platform is engineered for urban transit, fleet deployment, and private-label brand distribution. Built around a precision-engineered 6061-T6 aluminum alloy frame, the

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Aluminum Folding Bike

This aluminum folding bike platform utilizes a hydroformed 6061-T6 aluminum alloy frame paired with CNC-machined locking hinge joints. Designed for private-label brands and fleet operators, the

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Compact Folding Bike

Engineered for urban transit fleets and commercial micro-mobility deployment, this compact folding bike combines high-tensile 6061-T6 aluminum architecture with a patented dual-safety hinge locking

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Lightweight Folding Bike

This commercial-grade lightweight folding bike is engineered for urban mobility distributors, fleet operators, and bicycle brands. Built around a hydroformed 6061-T6 aluminum frame, the design

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Key Product Features

Patented Dual-Safety Hinge:

Main frame and handlebar post utilize a secondary locking pin mechanism, rated for 50,000 continuous fold-unfold cycles without structural slackening.

Integrated Cable Routing:

Internal routing through the main triangle shields brake and shifter lines from weather exposure and snagging during transport.

Modular Seatpost Battery Ready:

Seatpost tube diameter (33.9 mm) allows seamless integration of cylindrical secondary battery packs for electric-assist conversion variants.

Telescopic Handlebar Stem:

Adjusts from 950 mm to 1100 mm height via a quick-release cam lever to fit rider heights between 145 cm and 195 cm.

Corrosion-Resistant Fasteners:

All exposed bolts, pivots, and washers utilize Grade 304 stainless steel to resist urban road salt and coastal humidity.

Technical Specifications

Parameter	Specification	Tolerance / Standard
Frame Material	6061-T6 Aluminum Alloy (Hydroformed)	+/- 0.1 mm wall thickness
Wheel Size	20-inch (406 x 1.75)	ISO 4210 compliant rim bed
Folded Dimensions	820 x 350 x 660 mm	Measured with pedals folded
Total Weight	11.5 kg (Excluding accessories)	+/- 300 g batch variance
Max Rider Weight	110 kg	Static proof load tested to 220 kg
Recommended Rider Height	145 cm – 195 cm	Ergonomic reach adjustment
Speed Drivetrain	Shimano Altus 7-Speed / Nexus 3-Speed Internal	Index shifting precision
Brake System	Mechanical Disc (160 mm rotors) / V-Brake options	Rotor runout < 0.3 mm
Surface Finish	Powder Coating / Anodized Matte	80–120 um film thickness

Frame & Structural Design The frame utilizes cold-forged aluminum head tubes welded to hydroformed main tubes via automated robotic TIG welding.

Stress-Relief Annealing: Frames undergo post-weld thermal treatment to eliminate residual internal stresses in the heat-affected zone (HAZ).

Reinforced Gussets: High-stress junctions at the bottom bracket shell and seat tube cluster feature internal reinforcement ribs to absorb vertical impact forces from pothole strikes.

Hinge Tolerance: Main folding pivot pins are precision-ground to a diameter tolerance of H7, pairing with bronze bushings to eliminate lateral play.

Components & Configuration

Drivetrain: Shimano Altus RD-M310 7-speed rear derailleur paired with an indexed thumb shifter; 52T chainring with dual-sided CNC alloy chain guard.

Cockpit: 6061 aluminum flat handlebar (560 mm width) with ergonomic kraton rubber dual-density grips; forged folding stem with safety-interlock clamp.

Braking: Promax mechanical disc brakes with 160 mm stainless steel rotors, paired with aluminum levers featuring integrated reach adjustment.

Wheels: Double-wall aluminum rims (28 holes, 24 mm profile) laced with 14G stainless steel spokes to CNC-machined sealed-bearing alloy hubs.

Contact Points: PU foam-padded ergonomic saddle mounted on a 33.9 mm x 550 mm cold-forged alloy seatpost; foldable resin platform pedals with steel spindles.

Applications

Urban Bike-Sharing & Fleet Leasing:

High structural fatigue resistance accommodates heavy daily rotations across municipal transit systems.

Corporate Campus Mobility:

Compact folded footprint fits inside office lockers, elevator cars, and car trunks for multimodal commuting.

Last-Mile Logistics:

Rear rack mounting points support heavy-duty pannier bags for courier and food delivery operations.

Recreational & RV Transport:

Fits easily into motorhome storage bays, boat cabins, and small apartment utility closets.

Customization Options

Frame Geometry & Branding: Custom headtube badge placement, laser-etched serial numbers, and custom Pantone color-matched powder coating (MOQ 300 units per color).

Drivetrain Tiering: Upgradable to Shimano Nexus internal geared hubs (3-speed / 8-speed) or belt-drive systems (Gates Carbon Drive CDX).

Accessory Bundling: Pre-installation options for integrated LED hub-dynamo lighting, mudguards (polycarbonate or aluminum), rear cargo racks, and kickstands.

Packaging Customization: Tailor-made corrugated master cartons with client logo printing and multilingual user manuals.

OEM & ODM Manufacturing

In-House Capabilities:

Tube cutting, CNC machining, robotic welding, frame alignment checking, automated electrostatic powder coating, and wheel building.

Prototyping Lead Time:

14 to 21 days from 3D CAD confirmation (STEP/IGES format) to physical prototype delivery for structural verification.

Production Capacity:

3 automated assembly lines yielding a combined output of 8,000 units per month, scaling to 15,000 units during peak seasons.

Traceability:

Laser-etched traceability codes on every bottom bracket shell link the frame batch directly to raw material mill certificates.

Quality Control

Frame Fatigue Testing: Samples from every production batch undergo ISO 4210 frame drop tests, vertical load fatigue tests (100,000 cycles at 1000 N), and handlebar torque tests.

Salt Spray Testing: Painted components undergo 500-hour neutral salt spray (NSS) testing according to ASTM B117 to verify corrosion resistance.

Dimensional Inspection: Coordinate Measuring Machines (CMM) verify alignment of dropout spacing (135 mm rear / 100 mm front) and headtube angle (+/- 0.5 deg).

Final Pre-Shipment Inspection (PSI): 100% functional check on brake tension, derailleur indexing, spoke tension uniformity, and torque verification of all safety-critical bolts using calibrated torque wrenches.

Packaging & Shipping

Carton Specification: 5-layer double-wall corrugated cardboard box (KMS kraft paper outer layer) with high-density EPE foam blocking inserts to prevent transit abrasion.

Carton Dimensions: 850 x 360 x 680 mm per unit.

Container Loading Capacity:
• 20ft GP Container: Approx. 180 units (fully assembled, folded in carton)
• 40ft HQ Container: Approx. 420 units (fully assembled, folded in carton)
• Shipping Terms: FOB Ningbo / Shanghai, CIF, or EXW based on client logistics preference.

MOQ & Lead Time

Minimum Order Quantity (MOQ):
• Standard Stock Configuration: 100 units per model.
• Custom OEM/ODM Configuration: 300 units per colorway/specification.

Standard Production Lead Time: 35 to 45 days upon receipt of deposit and confirmation of pre-production samples (PPS).

Sample Order Lead Time: 7 to 10 days for stock variants; 25 days for custom color prototypes.

FAQ

Q: What international safety standards do these folding bicycles comply with?

A: All production batches comply with ISO 4210 (Cycles - Safety requirements for bicycles) and EN 15194 standards where applicable. Test reports issued by third-party laboratories such as SGS or TUV are available upon request for regulatory compliance in EU and North American markets.

Q: Can the frame hinge mechanism withstand long-term commercial fleet usage?

A: Yes. The hinge utilizes a dual-safety locking pin design constructed from forged aluminum with stainless steel pivot pins. Accelerated durability testing confirms the mechanism maintains structural preload and zero lateral play after 50,000 continuous open-and-close cycles.

Q: What is the standard packaging method for international container shipping?

A: Each bicycle is packed individually in a reinforced 5-layer corrugated master carton with customized EPE foam inserts immobilizing the frame, wheels, and handlebars. The bicycles arrive 95% pre-assembled; final assembly requires only straightening the handlebar and attaching the pedals.

Q: How do you handle raw material batch traceability and quality consistency?

A: Every frame bears a laser-etched serial number on the bottom bracket shell linked to our ERP manufacturing database. This code records the exact aluminum coil heat number, welding operator ID, powder coating batch, and CMM dimensional inspection report.

Q: What are the payment terms for bulk OEM manufacturing orders?

A: Standard commercial terms require a 30% telegraphic transfer (T/T) deposit upon order confirmation, with the remaining 70% balance payable against copy of the Bill of Lading (B/L) or after passing third-party pre-shipment inspection (PSI) at our factory floor.

Q: Is it possible to integrate an electric-assist motor system into this frame design?

A: Yes. The frame architecture accommodates a 33.9 mm seatpost battery configuration or a front-hub motor drive system. Our engineering team can provide modified rear dropouts and internal cable routing ports for controller integration during the ODM phase.

Request a Quote

To receive a detailed commercial quotation including freight estimates, component upgrade options, and sample lead times, submit your specification requirements directly to our engineering sales team:
Email:sandy@gentlesports.cn
Direct Inquiry: Please include your target volume, port of destination, and required regulatory compliance documents in your message.

As one of the leading folding bike manufacturers and suppliers in China, we warmly welcome you to wholesale high-grade folding bike from our factory. All customized bikes are with high quality and competitive price.