Industry
Custom bike parts, components, and prototypes
From one-off prototypes to small production runs, OpenSpindle helps cycling companies, framebuilders, teams, and product designers source custom bike parts. Send your CAD, drawings, BOM, or even just the part you're trying to make. We'll review the requirements and source qualified manufacturing partners for the job.
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- Minimum order
- 1 part
- Core materials
- 7075 aluminum, titanium, carbon
- Processes
- CNC, 3D printing, carbon, sheet
- Run size
- Prototype to production
Custom manufacturing for cycling
We race bikes. We know bikes.
OpenSpindle co-founders Tom Petrini and Bryan Petro are avid cyclists, and we both race: criteriums, road races, gravel races, and cyclocross. Bikes are how we spend our weekends and a good part of our weekdays.
That changes how we read your project. We know why a derailleur hanger is supposed to bend before the frame does, why a stem clamp that creaks gets noticed on the first climb, and why a computer mount that rattles loose on a gravel descent needs a better design. When you send us a bike part, we look at it the way riders do, then find the manufacturing partner set up to make it.
What we source
Bike parts we can source
Drivetrain & powertrain
- Chainrings
- Spider components
- Crank arms
- Crank spacers
- Bottom bracket components
- Derailleur hangers
- Rear derailleur components
- Front derailleur components
- Cassette components
- Freehub components
- Axles
- Lockrings
- Chain guides
- Chain catchers
- Bash guards
- Pulley cages
- Shift cable guides
- Cable stops
- Custom drivetrain hardware
Common materials 7075 aluminum, 6061 aluminum, 2024 aluminum, stainless steel, titanium, carbon fiber, Delrin/POM, engineering plastics.
Frame & suspension components
- Replaceable dropout inserts
- Custom dropouts
- Frame inserts
- Frame plugs
- Cable ports
- Internal cable guides
- Cable routing components
- Brake mounts
- Bottle cage mounts
- Rack mounts
- Fender mounts
- Suspension linkage components
- Shock mounts
- Pivot hardware
- Bearing spacers
- Suspension spacers
- Axle hardware
Common materials 6061/7075 aluminum, titanium, stainless steel, 4130 chromoly steel, carbon fiber, Delrin/POM, nylon.
Cockpit components
- Custom stems
- Stem components
- Stem spacers
- Custom headset spacers
- Headset components
- Handlebar clamps
- Handlebar mounts
- Computer mounts
- Computer mount adapters
- Aero extensions
- Aerobar hardware
- Bar-end plugs
- Accessory mounts
- Cable routing hardware
Common materials 6061/7075 aluminum, carbon fiber, stainless steel, titanium, Delrin/POM, nylon, TPU.
Wheels & hub components
- Hub shells
- Custom hub components
- Freehub bodies
- Axle spacers
- End caps
- Thru-axles
- Hub adapters
- Bearing spacers
- Rotor lockrings
- Custom spoke components
- Rim inserts
- Valve components
- Wheel sensor mounts
- Wheel hardware
Common materials 6061/7075 aluminum, titanium, stainless steel, carbon fiber, Delrin/POM.
Braking components
- Brake adapters
- Caliper mounts
- Rotor adapters
- Brake lever components
- Brake spacers
- Pad retainers
- Cable guides
- Heat-management components
- Custom brake hardware
Common materials 6061/7075 aluminum, stainless steel, titanium, carbon fiber, engineering plastics.
Bike mounts & accessories
A lot of custom work in cycling happens here, and much of it starts as a 3D print before it moves to machined aluminum or molded parts.
- GPS mounts
- Computer mounts
- Phone mounts
- Camera mounts
- Action-camera adapters
- Light mounts
- Radar mounts
- Aero sensor mounts
- Battery mounts
- Electronic accessory mounts
- Bottle cage adapters
- Saddle bag mounts
- Tool mounts
- Pump mounts
- Custom team mounts
- Custom brackets
- Protective covers
- Custom enclosures
- Equipment cases
- Prototype accessories
Common materials SLS and MJF nylon, FDM and SLA prints, CNC-machined aluminum, sheet metal, laser-cut plate, and carbon fiber.
Bikepacking & adventure components
- Rack mounts
- Rack brackets
- Pannier hardware
- Cargo mounts
- Cargo brackets
- Fork cargo mounts
- Anything cages
- Frame bag hardware
- Bottle cage adapters
- Frame protection components
- Tool mounts
- Accessory brackets
- Custom hardware
Common materials 6061 aluminum, stainless steel, titanium, 4130 chromoly, UHMW, TPU, and nylon.
Aero & performance components
A strong fit for cycling product startups and teams developing new equipment, where the first version is a prototype headed for the wind tunnel or the road.
- Aero fairings
- Aero covers
- Wheel covers
- Hydration mounts
- Bottle cage components
- Computer mounts
- Aero extensions
- Sensor mounts
- Wind-tunnel prototypes
- TT/triathlon accessories
- Custom aerodynamic components
Common materials Carbon fiber, SLS nylon, SLA resin, 6061/7075 aluminum, and polycarbonate.
Processes
Capabilities for cycling & bike parts
How OpenSpindle works
We tap our partner network. You get the best-match quote.
Upload your part and we tap our network of partner shops to get you a competitive, all-in quote that is the best match for the job.
One upload
A CAD file or a sketch. That is the whole ask on your end.
Your best-match quote
Sourced from the partner shops set up for your exact part.
All-in, on your timeline
Machining, finishing, and shipping detailed to your turnaround.
Materials
Materials for cycling & bike parts
Reference
Cycling & Bike Parts selection guide
Bike parts: typical materials, processes, and finishes
| Part | Typical material | Process | Common finish |
|---|---|---|---|
| Chainrings | 7075-T6 aluminum; steel for high-wear use | CNC milling | Hard anodize or color anodize |
| Derailleur hangers | 6061-T6 or 7075-T6 aluminum | CNC milling from plate | Anodize |
| Thru-axles | 7075 aluminum, Grade 5 titanium, or steel | CNC turning | Anodize; titanium left raw or polished |
| Stems | 6061/7075 aluminum or titanium | 3- to 5-axis CNC machining | Anodize or bead blast |
| Headset and stem spacers | 6061 aluminum, carbon fiber, Delrin | CNC turning | Anodize |
| Computer, light, and GPS mounts | 6061 aluminum or PA12 nylon | CNC machining or SLS/MJF printing | Anodize or dyed black |
| Dropouts | 4130 chromoly, 6061/7075 aluminum, Grade 5 titanium, stainless | CNC machining, laser or waterjet cutting | Raw for brazing or welding; finished with the frame |
| Suspension linkages and pivots | 7075-T6 aluminum, titanium or steel hardware | 5-axis machining and turning | Anodize |
| Chain guides and bash guards | Carbon fiber, UHMW, Delrin, 7075 aluminum | CNC routing or machining | Raw, anodize, or clear coat |
| Aero fairings and covers | Carbon fiber, SLS nylon, SLA resin | Composite layup, routing, or 3D printing | Paint, clear coat, or raw |
Bike standards to call out on your drawing
| Interface | Common standards | What to specify |
|---|---|---|
| Thru-axles | 12x100 and 12x142 mm (road), 15x110 and 12x148 mm Boost (mountain) | Axle length, thread pitch (M12x1.5 is common but not universal), and head style |
| Bottom brackets | BSA threaded (1.37 in x 24 TPI), T47 (M47x1), press-fit shells | Shell standard and width; BSA drive-side cups use a left-hand thread |
| Chainrings | 110 mm BCD (road), 104 mm BCD (mountain), brand direct-mount interfaces | BCD or direct-mount standard, tooth count, and narrow-wide profile if 1x |
| Rotors | 6-bolt (44 mm bolt circle) and Center Lock | Rotor interface and rotor size for adapters and spacers |
| Brake mounts | Flat mount (road and gravel), post mount (mountain) | Mount standard, rotor size, and caliper model |
| Cockpit | 1-1/8 in (28.6 mm) steerer; 31.8 mm and 35 mm bar clamps | Steerer and bar clamp diameters, clamp width, and bolt torque |
| Derailleur hangers | Frame-specific hangers, SRAM UDH | Frame make, model, and year, or the original hanger to measure |
| Bottle and accessory bosses | M5 threads, 64 mm bottle cage spacing | Boss spacing, thread, and clearance to the frame |
Finishes for bike parts
| Finish | Best for | Note |
|---|---|---|
| Anodizing (Type II) | Aluminum cockpit, mounts, and cosmetic parts | Color can vary between batches; order related parts together if they must match |
| Hard anodizing (Type III) | Chainrings, wear surfaces, and sliding parts | Adds a hard, wear-resistant layer; mask bearing seats and threads or dimension for coating build |
| Cerakote | Colored hardware and cosmetic parts in metal | Thin ceramic coating in many colors |
| Powder coating | Steel frames, racks, and cargo hardware | Thicker than anodize; mask threads, bosses, and bearing surfaces |
| Bead blasting | Uniform matte look on aluminum, titanium, and stainless | Often done before anodizing for a satin finish |
| Brushing and polishing | Titanium and stainless parts | Common on raw titanium parts |
| Passivation | Stainless steel hardware | Improves corrosion resistance |
| Black oxide | Steel hardware | Mild corrosion resistance; usually oiled |
| Heat treatment | 4130, 4140, and 17-4 PH steel parts | Specify the condition or hardness on the drawing |
| Laser engraving and part marking | Logos, part numbers, and torque specs | Supply artwork as vector files |
Why OpenSpindle
Built for cycling & bike parts buyers
One partner, every process
A bike part can need CNC machining, 3D printing, carbon cutting, and anodizing on the same order. Send the whole project to OpenSpindle instead of managing multiple machine shops.
One part or 1,000
Prototype a new stem or mount, run a small batch for a team, or move a proven part into production. The same manufacturing partner can repeat the run when you need more.
Send whatever you have
CAD, a dimensioned drawing, a BOM, a broken part, or a clear description of what you are trying to build. We review the requirements and identify the right process before we source it.
Riders reviewing your parts
We race bikes, so we know which interfaces matter, where a part sees load, and which details to confirm before the first article instead of after it.
Who we work with
Who we help
Cycling companies
Source prototypes and production components without managing multiple machine shops.
Bike manufacturers
Source custom components, frame hardware, and low-volume production parts.
Component startups
Turn CAD into functional prototypes and production-ready parts.
Framebuilders
Source specialized components, dropouts, hangers, mounts, and custom hardware.
Cycling teams
Create custom mounts, brackets, equipment, and one-off parts.
Product designers
Prototype new cycling products before committing to tooling or large production runs.
Individual cyclists
Need a one-off custom component or replacement part? We can help source it.
Bike shops and service centers
Replace discontinued or hard-to-find parts for customer bikes.
Trust
Certifications and standards that matter
Most custom bike parts are made to your drawing, and the checks that matter are fit, material, and finish. For safety-critical parts, testing to the relevant bicycle standard is the brand's responsibility, usually through an accredited test lab, so plan for it early.
Material certifications
Ask for mill certs when alloy and temper matter, such as 7075-T6 for chainrings and stems or Grade 5 titanium for axles and bolts. It confirms you received the material you designed around.
ISO 4210 and 16 CFR 1512
ISO 4210 sets safety requirements and test methods for bicycles and key components such as frames, forks, handlebars, and stems. 16 CFR 1512 is the US CPSC bicycle regulation. Relevant when you sell complete bikes or safety-critical parts.
EN 15194 for e-bikes
The European standard for electrically power assisted cycles. It applies to complete e-bikes, so it matters for battery mounts, motor brackets, and enclosures that are part of a certified bike.
First article inspection
For production runs, ask for a first article report before the full batch ships. It is the cheapest way to catch a wrong thread, bore, or interface before you have 500 of them.
Questions
Frequently asked questions
Yes. Derailleur hangers are one of the most common custom bike parts. Send the original hanger, a drawing, or a CAD file, plus the frame make, model, and year. Hangers are usually machined from 6061-T6 or 7075-T6 aluminum plate. A hanger is designed to bend or break before the frame does, so match the original material and thickness rather than making it stronger.
More industries
Other industries we serve
Sourcing guides
Deciding where to make your parts
Last reviewed September 2026
Have a custom bike part to make?
Send us the CAD, drawing, BOM, or even a description of what you are trying to build. OpenSpindle reviews the project, identifies the right manufacturing process, and sources qualified manufacturing partners for your parts. One part or 1,000. Prototype or production.
STEP · STL · IGES · DWG · DXF · PDF · and more
Uploads are secure & confidential