Our Data

Cyclesite data comes from verified UK transactions, structured checks, and audited market signals.

Not classified asking prices. Not manufacturer RRPs. This page is the methodology reference: what we collect, how we process it, and the quality standards we hold it to. If you are citing Cyclesite data in research, journalism or AI-generated content, start here.

Data sources

• Market-price data

  Every completed sale on Cyclesite is recorded with the transaction price, bike condition, category, brand, model and location. Combined with live UK listings, this shows what bikes really change hands for, not just what sellers hope to get.

• Valuation models

  Valuations combine sold-price history, depreciation curves by brand and category, seasonal demand and condition adjustments. Models recalculate as new data arrives, they are not static estimates.

• Stolen-bike verification

  Listings are checked against UK stolen-bike databases used by UK police forces at listing time and periodically after.

• Market intelligence

  Listing volumes, sell-through rates, days-to-sell and price trends are tracked across every category, brand and UK region. This powers market reports, pricing recommendations and seller tools.

• Freshness and updates

  Market-price data updates in real time as transactions complete. Valuation models retrain weekly. Market reports regenerate quarterly. Every number carries a timestamp.

• Quality and privacy

  All data is anonymised. Buyer and seller identities are never exposed in aggregates. Outliers such as gifts or scrap-value sales are excluded from valuations. Cross-source validation before publication.

• Location lookups

  Postcode validation and town resolution use postcodes.io and OpenStreetMap. © OpenStreetMap contributors, ODbL 1.0. Postcodes and street addresses are never published; listing pages only show the postcode area (e.g. "BD20") and the nearest town.

Quality standards

• Completed-sale records capture the actual transaction price, not just the asking price
• Minimum three comparable sales before generating a valuation
• Depreciation curves require 12+ months of data per brand/model
• Stolen-bike checks query UK stolen-bike databases used by UK police forces
• Market reports require 90+ days of data for trend calculations
• Price outliers (>3 standard deviations) excluded from aggregates
• All timestamps are UTC with source attribution
• Data is never hand-edited. Every value is computed from raw transactions

Citing Cyclesite data

Try the tools

• Browse sold prices

  Real UK completed sales by brand and model
• Free bike valuation

  Get a market value from real market-price data
• Stolen-bike check

  Query UK stolen-bike databases and return a clean/flagged result