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Term

Turn Shape and Size

Two aspects of a turn’s path: shape describes how the direction changes through the arc, while size describes its spatial extent.

Aliases

Turn shapeen · Short form

GLOSSARY · Turns & riding control

Open or more completed turns can occupy different amounts of space. Small, medium and large are relative to the task and terrain unless a measurement is specified.

Context and distinction

Shape and size are related but separate; neither is fixed solely by the board’s sidecut radius.

More Turns & riding control terms →

HOW TO DO IT

Turn Shape and Size

Turn shape describes how far an arc closes across the slope; size describes its spatial scale. Rhythm, size and speed are related but independent recording variables.

Preparation and setting

Linked-turn control and adequate piste width.

How to understand / apply it

  1. Choose a corridor and desired shape.
  2. Ride several similar arcs.
  3. Change closure while keeping size broadly comparable.
  4. Then change size while preserving the selected outcome.
  5. Compare speed trend and available exit space.

How to learn / practise

Use open/closed and smaller/larger comparisons on familiar terrain. Avoid numerical radius targets unless the task actually measures them.

Errors and corrections

Calling fast turns small turns: inspect the path. Chasing a tight radius until control fails: widen the task. Ignoring traffic when closing uphill: reselect the corridor.

Observable checks

The rider reproduces the requested shape and size with a controlled speed trend.

Sources: AASI — Snowboard Performance Guide, v2.0, November 7, 2022

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editorial review notes

Assessment variables, not distinct named tricks.