Velopedia

Bicycle Knowledge,
Specifications & Tools

Velopedia combines technical reference articles, historical bicycle specifications, original archive research, and practical calculators for riders, mechanics, and anyone trying to understand how bikes work.

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01

Technical Encyclopedia

Components, technologies, standards, brands, e-bike systems, and the engineering behind modern bicycles.

Browse topics
02

Bicycle Archive

Explore 50,000+ historical bicycle records, compare up to three bikes side by side, and review original specifications by brand and model year.

Explore the archive
03

Workshop Tools

Seven purpose-built calculators for wheel building, drivetrain service, geometry, fit, suspension, and bicycle setup.

Explore all seven tools

Velopedia Data Research

See how bicycles changed over time

Explore original analysis of more than 50,000 Bicycle Archive records, including frame materials, brake technology, wheel sizes, and mountain-bike suspension by model year.

Explore Bicycle Trends
Four historical series
  • Frame materials
  • Brake technology
  • Wheel-size adoption
  • MTB suspension formats

Transparent coverage, sample sizes, methodology, and downloadable source data.

Velopedia Tools

Seven practical bicycle calculators

Transparent inputs, practical outputs, and guidance for applying the result.
Wheel Building

SpokeMaster

Calculate independent left and right spoke lengths from ERD, flange geometry, rim offset, spoke count, and lacing pattern.

Calculate spoke length Bike Setup

Tire Pressure

Estimate independent front and rear starting pressures from system weight, wheel load, tire size, terrain, casing, and air system.

Calculate tire pressure
Drivetrain

Gear Ratio

Compare gearing, cadence speed, range, and cassette jumps.

 Suspension

Suspension Setup

Build fork and shock sag targets and troubleshoot ride feel.

 Drivetrain Service

Chain Length

Turn drivetrain geometry and suspension growth into a cut-ready plan.

 Geometry

Bike Geometry

Calculate trail, wheelbase relationships, and reach/stack proportions.

 Fit & Position

Bike Fit

Build repeatable saddle and handlebar position coordinates.

View the complete tools hub

Latest Entries

Split Pivot Suspension

Summary Split Pivot is a four-bar rear suspension system developed by David Weagle and identified by a linkage pivot concentric […]

Maestro Suspension

Summary Maestro is Giant Bicycles’ dual-short-link rear suspension system. A rigid rear triangle is connected to the main frame by […]

Four-Bar Suspension

Summary Four-bar suspension is a family of bicycle suspension systems built around four rigid members connected in a closed loop […]

ISCG

Summary ISCG is the original International Standard Chain Guide interface introduced in 2003. It defines the position of three threaded […]

ISCG-05

Summary ISCG-05 is a standardized frame interface for mounting chain guides, bash guards, and related drivetrain-protection devices near a bicycle’s […]

Chain Guide

Summary A chain guide is a drivetrain component that limits chain movement around the chainring to reduce the chance of […]

A reference built around bicycles.

Velopedia brings technical explanations, historical model data, original archive research, and practical workshop tools together in one searchable bicycle reference.

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