Methodology

Specs and history

Each reference page (years produced, speeds, threading, clamp sizes, what it fits, how to identify it) was fact-checked against period manufacturer catalogs and the collector archives that host them: Velobase, Disraeli Gears, Classic Rendezvous, Sheldon Brown’s articles and Bike Forums’ Classic & Vintage threads. Where we couldn’t confirm a detail, such as an exact part number, a production year or a dating code, we left it out rather than guess. Parts of this age have running changes and exceptions, so treat every page as a starting point and confirm against the markings on the part itself.

No guessed prices

We don’t publish price ranges from memory. A price appears on a reference page only when it comes from a dated snapshot of the active eBay listings for that part (see below), and it is always labelled with the capture date. Asking prices are not selling prices: before you bid, look at eBay’s soldlistings (filter to “Sold items”) for the exact reference and anchor your offer there.

Finding listings

References without a snapshot link to a plain eBay search built from that part’s exact name and model. The search runs across all of eBay rather than one category, because vintage components are listed under several different cycling categories.

Originality first

Vintage Campagnolo specifically suffers from reproduction decals, refinished anodizing, and parts-bin assemblies sold as original; Shimano and SunTour are more honest markets but still carry a long tail of frankenstein builds. Our buyer notes flag the specific originality checks for each reference, and our guide to spotting reproduction Campagnolo goes deeper. We'd rather you pay the right price for what a part actually is than overpay for an assembly described as original.

Component photos

The product photo on a reference's page and cards is a representative image, not a photo of any one part for sale. We generate it with an AI image model, working from several real seller photos of that exact reference, and compare it against those photos before publishing. It is set on a plain studio backdrop so every reference reads the same way.

That means it shows what the reference looks like, not the condition of a particular part. Anodizing, polish, decals, engraving, Patent stamps, and wear vary from part to part and between production years, and some small details may be simplified. Judge originality and condition from the seller's own photos, and ask for close-ups of the date stamps and cage or body markings before you bid. Wherever a representative photo appears large it carries the caption “Representative photo — AI-generated from real seller photos. Individual listings vary.” References without one show no photo.

Market snapshots and buying picks

For references with a buying guide, we capture a snapshot of the matching eBay listings on a given date: the count, the price range, where most asking prices cluster, and a selection of listings with their price, shipping, format, seller feedback, and condition. The capture date is printed next to the listings (“Snapshot captured …”), and by the time you read it some will have sold or ended. The “See all current listings on eBay” link always opens the live search. When a snapshot has listings, the reference's typical price on the page comes from it; when nothing was listed, the figure is labelled an estimate.

Captured listings are tagged with plain labels: Cheapest (lowest delivered price for a complete, working part), Best value (evidence it is sound at a below-typical price), Best for beginners and Easiest to get working (serviced, cleaned, or shown working), Collector's pick (a desirable variant or date at a sane price), and Project piece (a cheap part worth rebuilding). Two warning tags flag listings to approach with care: Check the seller (little or no feedback) and Priced high (well above the typical range without a clear reason). These are judgement calls made from the listing text and photos. We have not handled the parts, and nobody pays for placement.

Independence

Links to eBay and Amazon carry no affiliate tracking, and we earn nothing from them (see disclosure). We're not paid by sellers and we're not affiliated with Campagnolo, Shimano, SunTour, Mavic, Cinelli, 3T or Brooks.