How to Order Custom OEM Carbon Bike Frames From China

Ordering custom carbon bike frames from China is not complicated because the manufacturing is hard. It is complicated because the buying process has more traps than most first-time brand owners expect: trading companies that present themselves as factories, mold costs quoted after you have committed to a geometry, samples that pass inspection while production does not, and compliance paperwork that turns out not to exist until customs asks for it.

This guide walks through the full sequence in the order you will actually encounter it, from the spec sheet you should build before contacting anyone, through tooling, sampling, testing and mass production. It is written from the perspective of a manufacturing partner that has been building frames since 2000 and ships to twelve export markets, so the emphasis is on the points where buyers typically lose money rather than on marketing language.

If you read only one section, read the spec sheet section. Almost every expensive mistake later in the process traces back to a specification that was never fully written down.

This guide describes the general process. If you want to see how the same steps map onto one factory’s actual workflow, our OEM and ODM page walks through the route from concept to container with the specific numbers behind each stage.

What “custom OEM” actually means

The phrase gets used loosely, and the price difference between the four real interpretations is large. Before you ask for a quote, decide which one you are buying.

Open mold, standard geometry

You buy an existing frame from the factory’s catalogue and put your own paint, decals and branding on it. There is no tooling cost, minimum order quantities are the lowest available, and lead times are short because the mold already exists and runs regularly. The trade-off is that the frame is not exclusive: another brand can buy the same one. For a first product line, or for testing whether a market exists, this is usually the correct starting point.

OEM on an existing mold

Same tooling as above, but the factory modifies the frame for you: different cable routing, a different bottom bracket standard, your own geometry tweaks within the limits of the existing mold, custom paint and decals, specific component interfaces. No new tool is cut, so cost stays low, but the result is meaningfully yours. This is the most common middle ground and, for many brands, the best value.

ODM: factory-designed product, your brand

The factory owns the design and the intellectual property and licenses it to you under your brand. You get a product faster because development is already done. The limitation is that you do not control the design roadmap, and exclusivity is rarely offered. ODM works well for accessory lines and for filling gaps in a range quickly, but it is a weak foundation for a brand whose value proposition is engineering.

Private mold: fully custom

You commission new tooling for a geometry and layup that did not exist before. Tooling cost is real, development takes months, and minimum order quantities are higher because the factory needs to amortise setup. In exchange you control the geometry, the layup schedule, the tube shapes and the IP, and the frame is exclusive to you for the life of the mold.

Private mold is worth it when your geometry is the product — a cargo frame with unusual load paths, an aero road frame with a proprietary tube profile, a frame designed around a specific motor or battery. It is not worth it when you are selling a general-purpose road frame into a crowded market.

Mode	Tooling cost	MOQ	Development time	Exclusivity
Open mold	None	Lowest	Weeks	No
OEM on existing mold	Low or none	Low	1–2 months	Sometimes, by market
ODM	None	Low	Weeks	Rarely
Private mold	Full	Highest	4–9 months	Yes

Before you contact anyone: build the spec sheet

A vague enquiry produces a vague quote, and a vague quote is where budget disappears. Write the specification first. It also changes how suppliers respond to you: factories quote differently to a buyer who clearly knows what they want.

The fields that actually determine your mold

Frame type and intended use. Road, gravel, XC, trail, enduro, downhill, commuter, cargo, e-bike. This determines the load cases the frame must survive, and therefore the layup.
Geometry. Not just “size 54” — supply reach, stack, head tube angle, seat tube angle, chainstay length, bottom bracket drop and wheelbase for every size you intend to sell. If you do not have geometry, say so explicitly and ask whether the factory offers geometry development.
Size run. Four to seven sizes is typical for a road frame. Every additional size is a separate layup and often a separate mold component.
Wheel and tyre clearance. 700c or 650b, and the maximum tyre width the frame must accept. This drives fork and rear triangle dimensions early.
Bottom bracket standard. BSA threaded, T47, PF30, BB86/92. Threaded standards are easier to service; press-fit saves weight and costs more to machine accurately.
Brake standard. Flat mount, post mount, or rim brake. Flat mount has become the default for road and gravel.
Axle standard. Thru-axle diameter and pitch front and rear, or quick release. Get the pitch right in the spec sheet — it is an expensive thing to correct later.
Cable routing. Fully internal, semi-internal, or external. Fully internal routing raises tooling complexity and assembly time considerably.
Head tube and steerer. Tapered or straight, and whether the fork is supplied by the factory or by you.
Finish. Painted, raw carbon with clear coat, or both across the size run. Paint specification matters more than buyers expect: number of colours, decals under or over clear coat, gloss or matte, and whether you need a specific paint system for durability.
Component interfaces. Seatpost diameter and shape, headset standard, derailleur hanger design, accessory mounts, rack and mudguard mounts.
Target weight and stiffness. State a target and a tolerance. “As light as possible” is not a specification and will produce arguments at sample stage.

Where buyers get this wrong

The three most expensive omissions are axle pitch, seatpost specification and paint details. Each is cheap to define at specification stage and expensive to change once tooling is cut. A fourth, less obvious omission is the test standard you intend to certify against — if you plan to sell in the EU, the frame needs to be designed for EN ISO 4210 from the start, and retrofitting a design to a standard is far more expensive than designing to it.

How to tell a factory from a trading company

Both can be legitimate partners. A good trading company adds real value: it consolidates multiple product categories, handles export documentation, and can be easier to work with than a factory that has no export department. The problem is not trading companies — it is trading companies that present themselves as factories, because you end up paying factory-direct prices for a margin you did not know existed, and you lose direct control over production problems.

Questions that separate them

Do you press the frames in-house? A trading company will answer with “our factory” or “our partner factory”. A manufacturer will name the process and the equipment.
How many autoclaves or presses do you run? This is a question a trading company cannot answer plausibly.
What is your layup schedule for a 54cm road frame? If the answer is generic, the design work is being subcontracted.
Can you show the paint line? Many genuine frame factories subcontract painting. That is fine, but knowing it tells you who to raise a paint problem with.
What is your monthly capacity for frames? Vague answers usually mean the capacity is someone else’s.

Documents to request

Ask for the business licence (check the registered scope mentions bicycle manufacture, not just trading), the factory audit report, product test reports from a recognised laboratory, and — importantly — a recent production video showing the frame being laid up and pressed. A video taken for you specifically, with your enquiry referenced, is much harder to fake than a marketing reel.

Certifications that actually matter

Certification is where a lot of money is spent on documents that do not affect either product safety or your ability to sell. Sort them into three groups.

Product safety standards — non-negotiable

EN ISO 4210 is the European standard for bicycle safety and covers frames and forks in Part 6. If you sell into the EU, your frame needs to be tested to it. For the United States, the relevant federal requirement is 16 CFR Part 1512. These are not marketing documents; they are the tests a frame has to survive, and they drive design decisions such as material thickness at the down tube and the fork crown.

Social compliance — increasingly required by retailers

BSCI, Sedex and SA8000 audits cover working conditions rather than product quality. They matter because large retailers and distributors increasingly will not list a supplier without one, and because they are a reasonable proxy for whether the factory is stable and professional. A factory that has passed a social audit has been visited by an independent auditor and had its records examined.

Quality systems — useful, but read the scope

ISO 9001 tells you a quality management system exists. It does not tell you the frames are good. Read the certificate’s stated scope: a factory certified for “bicycle accessories” is not certified for frames. Ask for the certificate number and verify it with the issuing body rather than accepting a PDF.

It also helps to see the testing in context. Our factory and quality control page documents the six production stages and the seven QC checkpoints a frame passes through, which is a useful template for the questions you should be asking any supplier.

Tooling: cost, ownership and lead time

Which tool material

Carbon frame molds are most often steel or aluminium. Steel tooling costs more but lasts far longer — tens of thousands of cycles — and holds dimensional accuracy better over a long production run. Aluminium is cheaper and faster to make, which suits low-volume or prototype work, but wears sooner. For a product you intend to sell for several seasons at volume, steel is usually the cheaper choice over the product’s life even though the invoice is larger at the start.

Who owns the mold, and what happens if you leave

This clause deserves more attention than it usually gets. Establish in writing: who owns the tool, whether it can be moved to another factory, what condition it must be returned in, and what the factory may do with it if you stop ordering. A private mold that you paid for but cannot take with you is not an asset, it is leverage against you. Where the tool is complex and the relationship is new, some buyers split ownership or negotiate a buy-out schedule.

Amortisation models

Tooling is usually handled one of three ways: paid upfront in full; amortised into the unit price across an agreed quantity; or partially upfront with the balance amortised. Amortising lowers the entry cost but locks you into a volume, and the unit price is only genuinely lower after the amortisation period ends. Ask for both an amortised and a non-amortised unit price so you can see the real comparison.

The sampling process

What a T1 sample is for

The first sample off new tooling exists to answer one question: does the frame match the drawing? Check dimensions against your geometry table, verify axle pitch and thread, check bottom bracket facing and alignment, measure weight, and confirm tyre clearance with the widest tyre in your specification. Do not evaluate paint quality at T1 — the paint on a first sample is often rough and rarely indicative.

What a T2 sample is for

The second sample incorporates corrections and should be cosmetically representative. This is the sample to ride, to photograph, to show distributors, and — critically — to send for testing. The T2 sample is also the reference for production: agree in writing that the approved sample defines the standard, and that any deviation in production is a defect.

What to check when samples arrive

Measure the frame against your geometry table rather than trusting the label.
Weigh it, and weigh it again after paint to separate frame weight from paint weight.
Check finish inside the bottom bracket shell and head tube — burrs and voids there are a fast indicator of process control.
Cut-section an old or rejected frame if the order justifies it. Looking at the actual wall thickness and resin distribution tells you more than any measurement from outside.
Have a third party test it if the volume is large enough to justify the cost.

Testing and quality control

What EN ISO 4210 Part 6 actually tests

Frame testing under this standard includes a fatigue test with pedalling forces applied at the bottom bracket, a fatigue test with vertical forces applied to the frame in a road-simulating rig, and impact tests including a falling-mass test on the frame and a falling-frame test. Forks have their own fatigue and static tests. The point of these tests is not to prove a frame is unbreakable — no frame is — but to establish that it survives a defined and repeatable load history, which is what separates a designed product from a copied one.

Ask which laboratory performed the tests, for the test report, and whether the report covers your specific frame or a structurally similar one. Reports covering a “representative model” are common and worth understanding rather than assuming.

In-line quality control and AQL

Acceptable Quality Limit sampling is the standard way to accept or reject a production batch without inspecting every unit. An AQL of 2.5 for major defects and 4.0 for minor defects is a common starting point. Define in the purchase order what constitutes a critical defect (cracking, delamination, incorrect axle thread) versus major (paint blemish, decal misalignment) versus minor. Undefined defect categories are the single most common reason inspection disputes drag on.

Third-party inspection

Independent inspection companies will visit the factory during production and before shipment. For a first order with a new supplier, the cost is usually worth it, both for the defect detection and because the factory knows an inspector is coming. Book the pre-shipment inspection early — inspectors get booked out in peak season.

MOQ, pricing and payment

How MOQ is really calculated

Minimum order quantity is not arbitrary. It reflects the minimum batch a mold can run economically, the minimum paint batch a colour line can justify, and the minimum volume that covers the factory’s setup time. This is why MOQ is usually quoted per model and per size rather than as a simple total, and why a five-size run can carry a much higher effective minimum than the headline number suggests. If your MOQ is a problem, ask which specific constraint drives it — sometimes a colour or a size is the real limit, and consolidating either one unlocks a lower order.

What moves the unit price

Volume. The largest single factor.
Number of sizes and colours. Each adds setup. Five colours across six sizes is thirty setups.
Layup complexity. A high-modulus aero frame with internal cable routing costs materially more to build than a round-tube frame.
Tooling amortisation. Whether it is inside the unit price or paid separately.
Components included. Frame only, frame and fork, or frame, fork, headset and seatpost.
Testing and certification. Whether the factory tests each batch or you pay for third-party testing.
Packaging. Retail-ready packaging with printed inserts costs more than bulk cartons and changes shipping volume.

Payment terms and where the risk sits

Thirty per cent deposit with the balance on sight of the bill of lading is common. The structure matters because it determines who carries risk at each stage. Paying a large deposit before tooling exists shifts risk to you; paying everything after arrival shifts it to the factory, which it will price for. A balanced approach is to tie payments to milestones you can verify — deposit against the purchase order, a second payment against approved samples, and the balance against shipping documents. Escrow services and letters of credit cost money but are worth considering on a first order with a supplier you have not visited.

Compliance, duties and the paperwork nobody mentions

Two frames that look identical can land at very different total costs depending on how they are classified and what trade measures apply. Get the HS code from your supplier early and verify the current duty rate and any trade measures that apply to that code for your destination country. Several jurisdictions have applied anti-dumping or countervailing measures to Chinese bicycle products at various times, and the scope of those measures has changed through review. Do not rely on a supplier’s assurance that “there is no duty” — verify it with a customs broker in your own country, because the liability lands on the importer, which is you.

Also confirm what labelling your market requires: country of origin marking, safety warnings, and in some markets a declaration of conformity with the applicable standard, which needs to be supported by an actual test report. The paperwork chain should exist before the container ships, not after it arrives.

Packaging, freight and lead time

Carbon frames are usually shipped one per carton with foam or molded pulp protection at the head tube and bottom bracket. Bulk packing several frames per carton reduces cost per unit but increases handling risk, and it makes retail-ready packaging impossible. Decide early whether you are shipping to a warehouse or to a retail partner, because it changes the carton specification and therefore the freight volume.

Lead time should be quoted in three parts rather than one number: tooling time, sample time, and production time. A single figure of “90 days” is not useful when tooling alone can take six weeks. Build your launch plan against the sum of all three plus shipping, and add a buffer — the first production run of a new frame rarely finishes on the original date. Chinese New Year is a real and predictable disruption; orders that fall on the wrong side of it can lose four to six weeks.

Running production without surprises

Once the first order ships, the work is in keeping the standard. Three practices matter more than the rest.

Keep the golden sample. Retain an approved reference frame at the factory and one at your end, sealed and dated. When a later batch feels different, you have something objective to compare against rather than a memory.

Request batch records. Layup records, cure cycle data and test results per batch let you trace a problem backwards. Factories that keep these records are, in practice, factories that control their process.

Visit, or have someone visit. Even one visit changes the relationship and surfaces things no document will — how the layup room is organised, whether the molds are stored properly, how busy the line actually is.

The ten most expensive mistakes

Specifying geometry loosely and discovering the problem at sample stage.
Not defining axle pitch, seatpost and paint details before tooling is cut.
Assuming a supplier is a factory because the website says so.
Paying for a private mold without a written ownership clause.
Approving a T2 sample without documenting what “approved” means.
Accepting a test report for a “representative model” without checking it covers your frame.
Leaving defect categories and AQL levels undefined in the purchase order.
Assuming no import duty without verifying the HS code and current trade measures.
Planning a launch with no buffer, and landing on Chinese New Year.
Cutting the second order’s inspection to save cost, then finding the drift two shipments later.

Frequently asked questions

How long does it take to develop a custom carbon frame from scratch?

For a private mold, plan on four to nine months from confirmed specification to approved production sample. Tooling alone typically takes four to eight weeks; the rest is samples, corrections, paint development and testing. Development on an existing mold is much faster, often four to eight weeks to a finished sample.

What is a realistic minimum order quantity?

It depends heavily on whether the mold exists and how many sizes and colours you need. Open-mold orders can start very low. A private mold with a full size run and several colours carries a materially higher minimum because each size and colour is a separate setup. The useful question to ask is not “what is your MOQ” but “what constraint sets my MOQ, and what would change it”.

Should I pay for the mold separately or amortise it?

Paying separately is cleaner and usually cheaper overall because you avoid the interest cost embedded in an amortised unit price. Amortising reduces cash needed at the start. Whichever you choose, get the tool ownership clause in writing, and ask for both pricing structures so you can compare the real totals.

Can I get an exclusive frame?

Exclusivity comes from owning the tool or from a contractual commitment. If you are buying an open mold, another brand can buy the same frame; the honest answer is that paint and branding are your differentiation, not the frame. If exclusivity is central to your brand, you need a private mold and a written exclusivity term, typically scoped by market or by volume commitment.

Do I need my own design team?

Not necessarily. Many factories offer geometry development and layup design as a service, and for a first product line this is often the right call because it shortens development and the factory already knows the limits of its tooling. What you should retain is the ability to evaluate the result: someone who can read a geometry chart and a test report and tell whether the product meets the brief. That capability is what protects you, more than owning the drawing.

What should the first contact with a factory include?

Send the specification, the size run, your target markets, your volume estimate and your launch timeline. That single message filters suppliers quickly: those who respond with specific questions are engaged with the actual project, and those who reply with a catalogue are not reading it. It also gets you a quote you can compare rather than a range you cannot.

Where a manufacturing partner fits

Most of this guide assumes something specific: that you are buying from a factory that presses frames itself, has been through independent social and quality audits, and can supply test documentation for the frames it sells. Those three things are what turn a purchase into a supply relationship rather than a transaction.

We have been building bicycles since 2000 and export to twelve markets, working across road, gravel, mountain, folding, cargo and electric platforms. That includes geometry development, private mold projects, and the testing documentation that European and North American buyers need. If you are at specification stage and want a second opinion on whether your geometry and size run are manufacturable before you commit to tooling, that conversation is usually worth having early — it is much cheaper than changing a mold.

Send your spec sheet, size run and target markets, and we will tell you honestly whether it is a private mold project, an OEM modification, or something an existing frame already covers. You can read more about how we work on the about page, or send the specification over directly.