Topic
Reference guides to bicycle and e-bike parts, standards, geometry and compatibility.
Identify a bike headset: threaded vs threadless, steerer sizes, EC/ZS/IS housings, cartridge bearing standards and how to read a SHIS code.
Reference to Shimano HG length classes, Micro Spline, LINKGLIDE and SRAM XD/XDR freehub bodies: what each takes, spacer rules and how to identify yours.
How to read the ISO marking to size a tube, match Presta, Schrader or Dunlop valves to your rim, and compare Schwalbe butyl and TPU tubes.
Disc rotor specs explained: 140 to 203 mm diameters, six-bolt vs Center Lock hubs, post and flat mounts, adapters, and wear limits.
What 1x, 2x and 3x mean, how each gets its gear range, a guide to which layout fits which rider, and worked ratio examples.
How quill and threadless stems attach, how length and angle move the bars, and how to measure steerer and clamp sizes, with a diagram and worked example.
What spoke gauge, butting and cross-3 or radial lacing actually change in a wheel, with figures from Sheldon Brown and DT Swiss spec pages.
Inch names are loose labels. The bead seat diameter in millimeters decides fit: 559 for 26, 584 for 27.5 and 650B, 622 for 29 and 700C, 571 for 650C.
Decision trees for matching tires, bottom brackets, rear wheels and axles, disc brake mounts and cassettes to your bike by the interface number, not the name.
How bicycle frames work: parts, steel, aluminum, titanium and carbon compared, sizing, geometry terms, ISO 4210 testing, and when to stop riding.
Plain-language directory of the ISO, EN, ETRTO and US CPSC standards that govern bicycles, tires and e-bikes: what each covers, its status and where to read it.