updated: 2022-06-11 status: There’s no way this is complete. effort: I’ve come across these while learning about bike gear, but haven’t seeked any out specifically.

Gear

• Bike Insights overlays the frame geometry of different bikes to compare them.
• Geometry Geeks shows statistics about frame geometry and the quantitative difference between frames.
• Bike Geometry Calculator makes it easy to analyze a custom frame geometry.
• What Bars compares handlebars by their top-down profile.
• Silca Pro Tire Pressure Calculator shows recommended tire pressure for a variety of road conditions.

Advocacy

• Cyclist Video Evidence hosts videos of near misses from cyclists.

Miscellaneous

• Velo Routes Tools contains gear inches, grade, and unit conversion calculators.
• BikeCalc has gear inches and fixed gear-specific calculators.