Guides / Choosing a Shop
Picking a Shop to Machine Your Bike Parts
September 21, 2026
Every shop with a mill can machine a bike part. Far fewer can deliver a finished, inspected, color-matched batch on the date they promised. Here is how to tell which one you are talking to, before you place the order.
Ask about machines, precisely
Not “do you have CNC machines”. Ask:
- How many milling machines, what axis count, and what work envelope
- Whether they have a 4th or 5th axis, and whether it is in daily use or occasional
- Whether they have turning capability with driven tools, which decides whether they can make round parts like hub shells
- What their normal batch size is
The axis question matters more than anything else on price. A part that takes five setups on a 3-axis machine may take two on a 4-axis machine. See design for machining.
Ask about finishing first, not last
This is the question most buyers leave until the end, and it is the one that decides the lead time.
- Do you anodize in house, or through a partner
- Which partner, and how long have you used them
- Can you hold color to an approved master sample
- What is your normal turnaround including finishing
- Have you matched color across 6061 and 7075 before
A shop that answers “we can arrange anodizing” has not thought about it. A shop that names its finisher and its turnaround has.
Ask about inspection
- What does your first article report look like, can I see a redacted example
- Is the CMM in house
- Can you supply mill certificates and keep lot traceability
- What do you do when a dimension goes out mid-batch
Details in quality control for machined bike parts.
Ask about the boring things
- Who owns the fixture and the program, and is it kept for repeats
- What is the repeat order price and does it skip setup
- What is your lead time, measured from the day the PO lands to the day parts ship
- Who deburrs, and is it inspected
- How do you pack, because an anodized part that arrives marked is a reject
The communication test
Send a deliberately incomplete RFQ to a shortlist. Leave out the finish, or the tolerance on one important bore.
- A shop that quotes anyway, fast and cheap, is guessing. It will guess again on your part.
- A shop that comes back with two specific questions and then quotes has read the drawing.
- A shop that comes back with fifteen questions is either thorough or inexperienced, and the questions themselves tell you which.
What you are buying, past a certain point, is the quality of somebody’s attention.
Red flags
- A quote far below the others, with no explanation of why
- No questions on a drawing that has ambiguities
- Unwillingness to supply material certificates
- Vagueness about who does the finishing
- A lead time that does not add up when you count the finishing days
- Reluctance to talk about what happens when something goes wrong
What you should send them
The same thing to every shop, so the quotes are comparable: a STEP file, a PDF drawing with tolerances and finish spec, quantity for this run, whether it repeats, the finish and color, and any inspection or certificate requirement.
If comparing shops yourself is not how you want to spend the week, send the drawing once on the RFQ form. We read it and pass it to shops that already machine and anodize bike components, up to three, and they quote you directly.
Frequently asked questions
Does the shop need to have made bike parts before?
It helps a great deal, mostly because of finishing. Machining aluminum is machining aluminum. Knowing that a brand needs color consistency across a range, that a bar clamp bore has to be kind to carbon and that a hanger should bend rather than snap is industry knowledge, and it saves you teaching it.
How do I compare quotes that are far apart?
Check they are for the same part. Differences usually come from machine capability, the number of setups assumed, whether finishing is included and whether inspection is included. A cheap quote with finishing excluded is not a cheap quote.
Is a bigger shop safer?
Not necessarily. Bigger shops have more capability and more process, and small orders can sit behind large ones. A well run small shop that wants your work often delivers better than a large one where you are a rounding error. Ask where your order sits in their mix.
Need a quote for this part?
Send the drawing. We match you with up to 3 shops that machine bike parts and reply within 24 business hours.
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