Release notes

What is new in which version, grouped by topic. The latest is at the top.

Version 1.0new

The first released version: your body and bike measurements become a riding position that you view in 3D, adjust, take with you and answer with a training programme for your body.

Calculating your riding position

  • Saddle height is a range of about two centimetres in which your knee angle is in the target zone — not a single number that contradicts itself.
  • The back angle follows from your bike and your body, not from a dropdown. It is judged against what your bike can actually deliver: road, gravel and trekking each have their own range.
  • Frame choice works with stack and reach windows instead of size labels. Stack follows from your riding style, reach from your body; you can optionally enter your arm span.
  • Saddle-to-bar drop is measured to the top of the handlebar — the way you measure it on the bike.
  • Crank length, shoe size, cleat, pedal, stem, spacers and the setback of the seatpost are inputs and go into the numbers. The defaults follow your inseam.
  • The section “What you would have to change to sit differently” says, in millimetres and spacers, how far the handlebar would have to move.
  • With the optional entry for sex, hints on saddle, handlebar, brake levers and cranks appear; there is also a page of its own, “Bike fit for women”.

3D view

  • A rider with joints, helmet and glasses sits on your bike. You switch between lines, model and anatomy.
  • The sliders take effect at once and the cards beside them recalculate — numbers and picture always show the same position.
  • Angle arcs with a number mark knee, hip, shoulder and elbow; the first time you adjust something, your old position stays behind as a ghost line.
  • “Apply this position” writes stack, reach and all slider values into the address so nothing is lost. The back slider stops where your hands no longer reach the handlebar.
  • You pick frame and jersey colour yourself; they travel in the link.

Training — new

  • The third tool in the sidebar is now called “Training” and replaces “Where does it hurt?”.
  • Four demands follow from your position: hips, trunk, shoulders and neck, each for your position today and for your riding style's target.
  • The programme fits your time: two, three or five sessions a week of 10, 20 or 30 minutes. From three sessions, A and B alternate; the order is move, strengthen, stretch.
  • Every exercise has instructions. Without a bike the page shows a rough version for the position your riding style aims for.
  • A card under the 3D view follows the back slider, and the report carries the programme as a section of its own.
  • The Training page shows your bike with the four angles; hover a requirement and its angle lights up in the picture.
  • The programme comes as a sheet to print or save as PDF: with short instructions per exercise and a grid to tick off four weeks.

Compare bikes

  • Two bikes side by side: bike A is drawn, bike B sits underneath as a ghost line — the same person, one bottom bracket.
  • Each bike has its own type, stem, spacers and setback. Bike A is the same bike as in the calculator; your entries move with you.
  • A switch above the 3D view changes between the bikes without rebuilding the scene.

Take it with you, share it

  • The link is the storage: all entries are in the address. A bookmark is enough, and a link you send shows the same position.
  • The report is a sheet to print or file away: entries, result, side view, training. It can be saved as an HTML file that is complete even without the site.
  • Your configuration can be saved as a file and loaded again.

Calibrated on real bikes

  • The model was checked against three measured bikes: road, gravel and mountain bike. On the road bike it is within about a millimetre.
  • The “Measure your bike” page says how to take saddle height, drop and setback on your own bike, and checks the numbers for what cannot be before they are sent. If you are sure, you can still send them.

Pages and languages

  • Radhaltung comes in German and English. The language is in the address, and your entries stay when you switch.
  • A landing page with a finished example explains what happens here; the calculator has an address of its own and no longer jumps.
  • The sidebar with the three tools — riding position, training, compare bikes — is on every page.

Privacy

  • Radhaltung stores nothing: no accounts, no cookies, no database.
  • Nothing is loaded from third parties — no external fonts, no ad network, no counting. The browser enforces this itself with a content security policy.
  • The server log cuts off the query part of the address, shortens the IP address and leaves out the browser identifier and referrer. Your body measurements are never in it.
  • Reports carry “noindex” and are not cached; the imprint and privacy notice appear in the footer as soon as the operator has set them up.