Your riding position

Your details
1 · Your body

Inseam: stand barefoot against a wall, hold a book level between your legs, measure down to the floor.

Arm span: stand with your back to a wall, arms stretched out level to the sides. Stick a piece of tape to the wall at each fingertip, then measure the distance between the tapes. You can do it alone — and the length of your arms changes your back angle more than you would think.

Fine tuning — saddle, shoe, pedal

Shoe, cleat, pedal and foot angle move the foot relative to the pedal axle — and with it the saddle height that goes with a knee angle.

2 · Your bike
or

Stack and reach are in every manufacturer's geometry table. Entering both overrides the frame size you picked.

The type decides where your hands are — and with that, how upright you sit: on a flat bar you grip behind the stem clamp and above it, on a drop bar 90 mm in front of it. Triathlon is deliberately missing: there the rider lies on the forearms, and that is not a different setting but a different calculation.

Where do I find stack and reach?

In your bike's geometry table: open your model on the manufacturer's site and go to the “Geometry” tab. Stack and reach are given in millimetres, one column per frame size. You cannot measure them off the bike itself — they are derived figures, not tube lengths.

BianchiBMCBullsCannondaleCanyonCubeFocusGhostGiantKTMMeridaRoseScottSimplonSpecializedStevensTrek

An older model year the manufacturer no longer lists? These collections often carry old models too. They are other people's sites — this page fetches nothing from them, it only points the way: Geometry Geeks99 Spokes

Fine tuning — frame, seatpost, cockpit, colour

The number is usually printed on the side of the stem, often as "±6°" or "17°". Whether it raises or lowers the bar depends only on how it is mounted: flipped, the same stem raises the bar by about two centimetres. Spacers are the rings under the stem, 5 mm each.

The crank length is usually printed on the inside of the crank arm. It moves the bottom of the pedal stroke and with it the knee angle: between 165 and 172.5 mm there are about three degrees. Without it the crank follows your inseam, in the sizes you can actually buy.

The setback is printed on the seatpost — 0 for a straight one, otherwise usually offset 10 to 25 mm to the rear; without an entry the page uses 10. How far behind the bottom bracket the nose of the saddle ends up is worked out by the page: that also depends on the seat angle and the saddle height, which is why it is a different number on every frame.

The seat tube angle is in the geometry table. It decides how much of the saddle height acts horizontally rather than vertically, and with it the setback to the bottom bracket — on a mountain bike that amounts to several centimetres. Without it, the page uses the angle of the nearest calibrated frame size, and that one is measured on a road bike.

3 · Your position

Something is still missing for that:
  • Your frame's measurements — pick a size or enter stack and reach
  • Your inseam
As soon as something is entered above, this is where you will find what can be changed on the bike.

Saddle, handlebar, brake levers, cranks

This setting does not change the numbers above: saddle height and back angle follow from inseam, height and arm span. Sex only decides which notes on saddle, handlebar, brake levers and cranks appear here.

Saddle

On average, women's sit bones are further apart (about 13 versus about 12 cm). Wider, shorter saddles with a softer cut-out commonly work better — against pressure on soft tissue, the most frequent complaint.

Check: measure your sit-bone distance (corrugated cardboard, sit on it, measure the imprints) — depending on posture, add 1 to 2 cm of saddle width.

Handlebar width

Shoulders are narrower on average; handlebars of 38 to 40 cm instead of 42 cm are common. Bars that are too wide push the arms outward and load shoulders and neck.

Check: measure your shoulder width between the bony points (acromion). The bar, measured centre to centre of the ends, is about the same.

Brake levers

Hands are smaller on average. Levers with adjustable reach (or a short reach) save effort and spare the wrist.

Check: brake with your index finger — if the hand stays relaxed on the grip, the distance fits.

Crank length

Shorter legs usually mean shorter cranks, often 165 to 170 mm. That follows from leg length, not from sex.

Check: crank length follows inseam, not sex — anyone with an 80 cm inseam looks for the same crank.

Keep this answer

There is nothing to save — the link is the storage.

/en/fit?geschlecht=frau

Or as a file, if a link feels too fleeting: download radhaltung.json. It holds only what you entered — everything is recalculated when it is read back in.

Something is still missing for that: Your frame's measurements — pick a size or enter stack and reachYour inseam