What Should We Note in Custom Processing of Bicycle Hubs for Different Models?

Below, Kunshan Hoveric has summarized key points that must be noted in custom processing of bicycle hubs for different models.

 I. General Notes for Custom Processing (Applicable to All Models)

 Precision Control

Runout of axle retainers, bearing seats and flanges must be controlled within extremely tight tolerances; otherwise, wobbling, abnormal noise and overheating will occur.

Concentricity between the hub shell and axle core directly affects wheel roundness, with higher requirements for high-end models.

Material and Heat Treatment Matching

6061/7075 aluminum alloy is commonly used for road and ultra-light models, requiring T6 heat treatment.

Mountain, dirt jump and BMX models endure heavy loads, so flanges and axle cores need higher strength, with some parts reinforced by steel components.

Avoid mismatched materials that cause insufficient strength or corrosion.

Bearing Specifications and Preload Design

Specify bearing models and sealing types (2RS / open / ceramic).

Preload clearance must be reserved in customization to prevent locking under high speed or heavy load.

 Flange Dimensions and Hole Positions

Hole count, PCD pitch and flange diameter must strictly correspond to rim and spoke specifications.

Asymmetric design of left and right flanges affects wheel tension balance and must be clearly marked during customization.

 Surface Treatment

Specify thickness and color code for anodizing, sandblasting, polishing and painting.

Avoid overly thin oxide layers on stress-bearing parts to prevent chipping from impact.

Thread and Quick-Release / Thru-Axle Specifications

Thread precision directly affects locking strength and must comply with unified standards.

Thru-axle hubs require strict control of dropout width, axle core length and locking structure.

 Strength and Fatigue Testing

Custom hubs must undergo impact, torsion, salt spray and high-speed durability tests.

Competition-grade models shall be verified against race-level standards.

II. Key Differences in Hub Customization for Different Models

 1. Road Bike Hubs (Lightweight + High Rotation Speed)

Focus: lightweight design, balanced rigidity, low rolling resistance

Customization Notes:

Maximize flange size to improve wheel rigidity while controlling wall thickness to avoid excess weight.

Use high-speed, low-resistance bearings with moderately tight sealing.

Axle core can be hollowed for weight reduction with sufficient strength verification.

Support quick-release or thru-axle, mainly with 100/142mm dropout width.

 2. Mountain Bike Hubs (High Strength + Impact Resistance)

Focus: impact resistance, flange strength, sealing and dustproofing

Customization Notes:

Strengthen flange thickness and driver body structure to prevent pawl breakage.

Adopt double-sealed bearings for muddy environments.

Freehub body must withstand high-frequency impacts, with precise matching for XD/MS/XD-11 standards.

Commonly 110/148mm Boost dropout width, which must be specified in customization.

3. BMX / Dirt Jump Bike Hubs (Extreme Impact + High Strength)

Focus: extreme durability, fracture resistance, simplicity and reliability

Customization Notes:

High-strength alloy steel is recommended for the axle core.

Integrated flange and shell structure ensures stability and avoids weak welding points.

Simplify the structure, reduce redundant parts and lower failure rates.

Pawl count and engagement angle shall suit stunt riding forces.

 4. Folding Bike Hubs (Compact Size + Versatility)

Focus: compact dimensions, compatibility with small wheel diameters, general adaptability

Customization Notes:

Limited overall length and diameter require a compact structure.

Quick-release is widely used for easy assembly and disassembly.

Spoke hole angles shall be recalculated for small-diameter rims.

Balance lightweight and daily durability without pursuing extreme competition-level strength.

 5. Tricycle / Cargo Bike Hubs (High Load + Durability)

Focus: load capacity, wear resistance, stable transmission

Customization Notes:

Enlarge axle diameter and thicken shell to withstand high torque.

Upsize bearings to improve load capacity and service life.

Usually matched with differentials and drive shafts, requiring strict interface dimension matching.

Higher anti-rust requirements for long-term outdoor use.

 6. Ultra-Light Hubs (Extreme Lightweight)

Focus: material optimization + structural hollowing

Customization Notes:

Only high-grade aluminum alloy is allowed, with local reinforcement for critical parts.

Stress analysis is required for CNC hollowing to prevent fracture.

Not suitable for off-road or heavy-duty use; application scenarios must be clarified during customization.

 III. Basic Information Checklist for Customer Customization

To avoid processing errors, confirm the following before ordering:

- Applicable model (road / mountain / BMX / folding / tricycle)

- Dropout width (front / rear)

- Axle type: quick-release / thru-axle (specifications)

- Spoke hole count, PCD, flange diameter

- Freehub standard (HG/XD/MS, etc.)

- Bearing model and sealing type

- Material, surface treatment and color

- Load capacity / speed / application scenario

- Mold development, LOGO engraving and patented structure requirements

- Tolerance standards and quality inspection requirements

IV. Summary of Hoveric’s Advantages in Custom Hub Manufacturing

- Differentiated structural design based on model scenarios, avoiding blind universalization.

- Precision and strength controlled by engineers with 10–20 years of experience.

- Stable delivery from prototypes to small-batch and mass production.

- Matching optimization with wheel manufacturers to improve overall wheel performance.

- Rapid after-sales response, ideal for long-term cooperation with high-end brands.