Stamptivity
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September 24, 2026

Bike Fit

Load example bikes now opens a list of real geometry charts.

Load example bikes used to add one bike without asking. Now it opens a short list of real manufacturer charts, and you pick the model and the sizes you're weighing up: Polygon Strattos 7, Merida Scultura 5000, Giant Defy Advanced, Giant Contend AR, Giant Revolt Advanced and the flat-bar Giant Escape 3 Disc.

  • Sizes arrive as ordinary bikes — edit any number, compare them, or use one as a stand-in until you find your own bike's chart.
  • Each model shows the model year its numbers came from and links to the page they were read on, because geometry changes between years.
  • Every size is checked against the manufacturer's own top tube number, so a typo can't quietly become a wrong recommendation.

Adding a bike is now three clear choices instead of four overlapping ones: paste a chart, load an example bike, or type the numbers by hand. Your own bike still belongs in the tool by pasting its chart.