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2. Bicycle frame - Wikipedia

   en.wikipedia.org/wiki/Bicycle_frame

   Sheldon Brown's "Revisionist Theory of Bicycle Sizing" - an explanation of the different ways of measuring frame sizes. Frame Size Calculator - a simple frame size calculator tool; Metallurgy for Cyclists - discusses frame material properties in relation to suitability to frame use; BikeCAD program allows you to design your own frame online.

3. Bicycle and motorcycle geometry - Wikipedia

   en.wikipedia.org/wiki/Bicycle_and_motorcycle...

   Note that, on a bicycle, as rake angle increases, head angle decreases. Trail can vary as the bike leans or steers. In the case of traditional geometry, trail decreases (and wheelbase increases if measuring distance between ground contact points and not hubs) as the bike leans and steers in the direction of the lean. [17]

4. Bicycle fork - Wikipedia

   en.wikipedia.org/wiki/Bicycle_fork

   Too much trail makes a bicycle feel difficult to turn. Road racing bicycle forks have an offset of 40–55 mm. [2] For touring bicycles and other designs, the frame's head angle and wheel size must be taken into account when determining offset, and there is a narrow range of acceptable offsets to give good handling characteristics. The general ...

5. RattleCAD - Wikipedia

   en.wikipedia.org/wiki/RattleCAD

   rattleCAD provides all the tools needed for design bicycle from preliminary design of basic geometry, adjusted to cyclist body size, [44] to producing full assembly and frame manufacturing documentation: Step-by-step GUI for bicycle design.

6. Head tube - Wikipedia

   en.wikipedia.org/wiki/Head_tube

   Head tubes can use one of several size standards Bicycles; The head tube of a bicycle is sometimes designated by the fork steerer column it accepts. This can lead to confusion, since head tube inside diameters are dependent on the headset standard. For example, frames that take 25.4 mm (1 in) steerer columns can have three different inside ...

7. Q factor (bicycles) - Wikipedia

   en.wikipedia.org/wiki/Q_factor_(bicycles)

   Q factor is a function of both the bottom bracket width (axle length) and the cranks. Bottom brackets axles vary in length from 102mm to 127mm. Mountain bike cranks are typically about 20mm wider than road cranks. [6] A larger Q factor (wider tread) will mean less cornering clearance (while pedaling) for the same bottom bracket height and crank ...