What a carbon bike inspection report contains, section by section

A complete carbon bike inspection report has five sections, each written for a different downstream reader. The structure is documented, the sections each answer a specific question, and the report serves a buyer, a seller, an insurer, and a repair shop from the same PDF.

This page walks the report section by section, in the order a complete report carries them.

Section 1: Metadata and provenance#

Frame model, size, colorway, unique serial number, and reported crash or transport history (Carbon Bike Doctor). This section is what an insurer or a future buyer references first.

The serial number is load-bearing in three specific contexts. The manufacturer uses it to look up the production batch when a warranty conversation begins; the insurance adjuster uses it to verify the frame against the policy; the future buyer uses it to confirm the inspection is on this specific frame, not a different one of the same model. A report missing the serial is not portable across those three conversations.

The crash or transport history narrative captures what the owner reported about the frame's prior load events. The narrative is the inspector's input to the inspection's targeting (a reported high-side crash on the drive side directs raking-light attention to the drive-side BB area); it also matters downstream as a documentation of disclosure. A buyer's reasonable expectation is that the seller's reported history is consistent with the documented condition; the inspection report ties the two together.

Section 2: Three-tier safety categorization#

The categorization assigns the frame to one of three categories with specific criteria (VéloColour).

Safe. Laminate shows normal wall thickness and density. Zero internal or external structural anomalies. The bike rides without restrictions on the basis of the inspection.

Serviceable. No structural damage, but minor cosmetic chips, superficial scratches, or non-structural wear are logged for future monitoring. The bike rides; the cosmetic findings are documented so future inspections can read the change-over-time.

Unsafe. Structural damage identified, with the specific damage mode named: active delamination, fiber fractures, crushed clamp zones, or debonded joints. The bike does not ride until the repair-or-replace conversation completes.

The category drives everything downstream. Safe is a clean bill of condition that supports a sale or an insurance claim defending the pre-existing condition. Serviceable rides with a monitoring schedule. Unsafe triggers the remediation conversation in section 5 and front-ends the conversation with a repair shop, an insurer, or the manufacturer's warranty desk.

Section 3: Empirical diagnostic logs#

High-resolution photographs alongside NDT output. The output depends on the methods the inspection used: labeled ultrasonic echo figures from A-scan displays, high-contrast thermographic heat maps from active thermography, digital radiographic plates from computed radiography, UV-fluoresced dye penetrant images of surface-breaking cracks. Each figure shows the exact location and size of any subsurface anomaly.

This section is what makes the report independently auditable. A second-opinion lab reading the figures can reach the same conclusion the inspecting lab drew; an insurance adjuster can verify the basis for the finding without redoing the inspection; a repair shop can plan the scope from the documented damage map rather than starting from "the frame is broken somewhere."

Without this section, the report is one technician's verbal assertion. With it, the report is documented evidence. The difference matters in any conversation where the inspection is being asked to support a financial or warranty decision.

Section 4: Systemic torque and interface records#

Measured torque values at critical clamp zones: stem faceplate, seatpost collar, bottom bracket shell. The torque record is what flags over-tightened components on the report so they show up as findings, not missed calls.

Over-tightening is a slow-developing failure mode independent of any impact. A seatpost collar over-torqued for years can produce a crushed clamp zone that no impact ever caused. A stem faceplate over-torqued at every component change can crush the steerer-clamp area. A BB shell over-torqued can produce localized deformation at the bond line. None of these have a visible event the owner would associate with damage; all of them show up on torque records during inspection.

The torque record also matters for warranty conversations. Where the failure pattern is consistent with user-error (over-torqued clamp) versus a defect (failed bond at a joint that was within torque spec), the documented torque values are the input the manufacturer uses to draw the line.

Section 5: Remediation quotes#

When structural damage is found, the section carries an actionable financial estimate. Where a component cannot be safely repaired, the report explicitly advises replacement rather than repair (Carbon Bike Repair UK).

The default-replacement components are specific: damaged carbon handlebars, carbon stems, and lightweight carbon steerers. Load paths and weight margins on these components do not tolerate post-repair stress concentrations. Bars carry the rider's hands at the failure point; stems concentrate loads at the steerer-clamp interface; steerers operate at aggressive weight margins that small geometry changes can push outside the engineered envelope.

Most frame and fork damage repairs cleanly with the right shop. The US cluster of carbon-bike repair specialists (Calfee Design, Ruckus Composites, Spyder Composites, Broken Carbon, TW Carbon, Hot Tubes) handles tube replacement, layup work, scarf joints, and paint with documented methodology. The remediation quote in the inspection report is the input to the repair conversation; the shop's own intake confirms scope and final price.

Throughout: cosmetic and structural separated#

Cosmetic marks are logged separately from structural findings throughout the report. A frame can carry a Serviceable section listing five cosmetic chips and an Unsafe section identifying one active delamination; the two are not conflated, and the bike's overall classification is the worst of the section-level findings.

The separation matters for two downstream conversations. For a resale conversation, the seller can credibly point to the cosmetic-only section as documentation of normal wear; for an insurance conversation, the structural section is the basis for the claim and the cosmetic section is excluded from the damage assessment.

How each section serves which reader#

The report's structure maps to four readers, each one with their own primary section.

The buyer or seller reads sections 2 and 5: what is the bike's category, and what is the remediation cost if anything is wrong. The categorization is the headline; the remediation quote is the financial input to the price.

The insurer reads section 1 first (provenance: is this the right frame, what did the owner report about prior events), then section 3 (auditable evidence: is the basis for the finding documented). Section 5 supports the claim amount.

The repair shop reads sections 3 and 5: where is the damage and how big is it, and what scope does the inspecting lab estimate. The shop will still want its own physical intake before committing to a final repair path or price, but the inspection report front-ends the conversation rather than replacing it.

The manufacturer's warranty desk reads sections 1 and 4 (provenance and torque record). The torque record is what distinguishes user-error from defect in the warranty conversation.

The single PDF serves all four conversations because each conversation has its own section.

What this means for the buyer#

A "report" that is two paragraphs and three photos is a different product than the five-section structure above. The structured report is what supports a resale conversation, an insurance claim, a repair shop's quote, or a manufacturer warranty conversation; an unstructured email summary supports a casual conversation between the inspector and the owner.

Ask which sections the lab's report includes before booking. A lab that produces all five is selling a portable document. A lab that produces a verbal summary plus three photos is selling triage. Both are defensible at the right price; the difference matters when the report is needed for any downstream conversation beyond the owner's own decision.

The shortest version of the rule: metadata, categorization, diagnostic logs, torque records, remediation quote. Five sections, each one serving a different reader, all in the same PDF.