Custom mountain bike lightweight stainless steel milled hub assembly

Custom CNC Machined Bicycle Hub Assemblies for Mountain Bikes

OEM Stainless Steel, Aluminum & Titanium Hub Manufacturing for Cycling, E-Bike and Performance Applications

Typical materials: 6061-T6 Aluminum, 7075-T6 Aluminum, Stainless Steel (304/316), Titanium (Gr5)  |  Tolerance: ±0.01 mm bearing seat  |  Applications: Mountain bikes, E-bikes, Gravel bikes, Downhill racing, Cargo bikes

Selection Rule: Choose CNC machining for hub orders below 500 pcs, custom geometry requirements, multi-material variants, or when bearing concentricity ±0.01mm is specified. Cast hubs become cost-effective only at high volume with fixed geometry.

Material Selection Rule: 6061 for cost-sensitive XC/trail hubs; 7075 for high-torque e-bike and racing; 316 SS for cargo/outdoor/corrosive environments; Ti Gr5 for premium ultralight where budget permits higher unit cost.

What materials are available for bicycle hubs?

6061-T6 and 7075-T6 aluminum for lightweight applications, 304/316 stainless steel for corrosion-resistant heavy-duty hubs, and titanium Grade 5 for premium ultralight components. Each material has distinct strength, weight, and cost characteristics.

Can you manufacture custom hub designs from my drawings?

Yes. We accept STEP, IGES, DWG, DXF, and PDF formats. Our engineering team reviews drawings within 48 hours and provides feasibility feedback including any manufacturability recommendations before proceeding.

What tolerance can you achieve on bearing seats?

±0.01 mm on bearing bore diameter and concentricity. Runout is verified by CMM on every production hub. For applications requiring tighter tolerances, single-setup grinding is available for bore roundness ≤0.005 mm.

Do you support low-volume production?

Minimum order quantity is 10 pieces for prototype batches. This allows design validation and field testing before committing to mass production volumes. Production batches of 100+ pcs receive volume pricing.

Can you provide anodized finishes for aluminum hubs?

Type II anodizing (standard, 10–25 μm) in black, silver, amber, and custom colors. Type III hard anodizing (50 μm) for abrasion-resistant e-bike and downhill hubs. Color matching to customer brand specifications is available.

What bearing types can be integrated?

Sealed cartridge bearings (standard in modern hubs) and cup-and-cone systems. We machine bearing seats to specification and can source and install bearings per customer requirement, or supply hubs as machined-only shells.

Do you manufacture e-bike specific components?

Yes. E-bike hubs require reinforced flange geometry and bearing seats for motor torque loads. We have experience with European e-bike brands manufacturing 7075-T6 aluminum hubs optimized for 250W–750W motor assistance ratings.

Can you sign NDA agreements?

Yes. Standard mutual NDA provided upon request. Custom NDA templates from the customer are also accepted. All hub drawings, specifications, and manufacturing data are kept confidential throughout the project.

What lead time should I expect?

Prototype (10–30 pcs): 7–15 working days from drawing approval. Production batch (100+ pcs): 20–30 days. Surface treatment adds 3–5 days. Expedited service available for urgent projects at additional cost.

How is hub quality verified before shipment?

CMM dimensional report covering bearing bore diameter, concentricity, spoke hole position, flange thickness, and overall runout. Surface treatment adhesion and hardness tested per specification. Full inspection report provided with each shipment.

Reviewed by

Chen, Senior CNC Manufacturing Engineer, 18 Years Experience

Specialized in: CNC Machining Process Optimization, Bicycle Component Manufacturing, 5-Axis Programming, Aluminum & Stainless Steel Processing