← Guides

What a carbon bicycle inspection actually covers (and what it doesn't)

The honest framing of this service is "a documented professional opinion on condition, based on what the photos show." That's shorter than "liability-bearing structural certification" and it's closer to what a home inspection provides in a real-estate transaction: not a guarantee, but a trusted outside party's written evaluation that both sides of a transaction can lean on.

Here's what that actually means in practice.

What's in a report

Every inspection report follows the same structure. You can see the exact layout in the sample report.

Overall condition summary. A paragraph placing the bike in context: general condition, anything noteworthy, and whether any findings would change how we'd describe it.

Four structural sections, each with a summary paragraph and a bulleted list of specific findings:

• Frame — top tube, down tube, head tube, seat tube, bottom bracket area, chainstays, seat stays.
• Fork — crown, legs, steerer (external).
• Handlebars and stem — visible damage, clamp integrity, signs of crash displacement.
• Seatpost — clamp area, minimum-insertion compliance, any cracks or wear.

Areas of concern. Anything that isn't routine wear gets its own block: a title, a paragraph describing what we see and why it matters, and references to the specific photos.

Recommendation. A single-word classification: Pass, Minor concerns, Significant concerns, or Inconclusive. The meaning of each is documented in the report itself.

Photo documentation. Every photo you submit is included, each with the inspector's caption noting what the photo shows. Captions are the working memory of the report — you can trust that anything not mentioned in a caption wasn't a finding.

What the report doesn't include

A few things we deliberately don't claim to provide:

• Future performance. The report describes condition at the time of the photos. It doesn't predict failure timelines under load.
• Guarantee of safety. We are not a certifying body. See our terms of service for the formal disclaimer.
• Frame-origin authentication. We don't certify that a frame is genuine vs. counterfeit. For high-end frames with authentication concerns, contact the manufacturer.
• Component health beyond the structural handlebar/seatpost pass-through. Drivetrain wear, wheel truing, bearing condition, cable integrity — out of scope.

The "Inconclusive" case

Occasionally we write "Inconclusive" as the recommendation. It means: we couldn't evaluate the frame adequately from the submitted photos. Most often the cause is photo quality — blurry images, harsh shadows on key junctions, a dirty frame, or missing angles.

When this happens we describe exactly what additional photos we'd need, and you can re-upload without paying again. Our photo guide covers the common setup mistakes.

What's structural vs. structurally ambiguous

Some findings are unambiguous — a visible crack, a soft delaminated patch, a clear impact dimple. We call these as we see them.

Other findings are structurally ambiguous — stress whitening at a junction, a paint chip near a high-stress area, a subtle geometry irregularity that might or might not indicate a prior repair. In these cases we describe what we see, explain what it could indicate, and flag whether further evaluation is warranted. We don't overclaim, and we don't underclaim.

When a photo-based inspection isn't enough

A photo-based inspection has real limits. Some damage is only detectable through non-destructive testing that requires specialized equipment and the bike in hand:

• Ultrasonic testing — detects sub-surface voids and delamination invisible from outside.
• X-ray or CT imaging — identifies internal layup flaws and repair integrity.
• Thermographic imaging — useful for certain damage patterns; less common in the bicycle world.

If photos suggest one of these is warranted, we'll say so explicitly in the report so you have the information you need to decide whether to escalate. As our in-person capacity expands, we plan to bring the most common NDT methods in-house.

How this fits into a transaction

The single most common use of an inspection report is during a private used-bike sale:

• Buyer conditions the purchase on an inspection.
• Seller orders the inspection, receives the report, and can share the link in their listing.
• Both parties have a written third-party document that replaces "trust me" with "trust the report."

For buyers, the companion guide is buying a used carbon bike. For sellers, see selling your used carbon bike.

Order an inspection at presidiocomposites.com/order.