Wine · Terminology

Racking

Moving wine off its sediment into a clean vessel, leaving the lees behind.

Racking (soutirage) is transferring wine off its sediment into a clean vessel. The lees — dead yeast, grape solids, precipitated tartrates — settle to the bottom of the tank or barrel; racking draws the clear wine off the top and leaves them behind.

It is the cellar's basic clarification tool, done by gravity or gentle pump, and it does two jobs at once: it clarifies the wine and it aerates it, since every transfer introduces a controlled dose of oxygen.

In practice

  • Traditional barrel regimes rack every three months or so; modern low-oxygen regimes rack far less.
  • Gross lees are usually removed early; fine lees may be kept deliberately for sur lie ageing.
  • Closed racking under inert gas avoids oxygen where freshness is the priority.
  • Sulfur is commonly adjusted at racking, since the wine is exposed anyway.

Where you'll meet it

  • The maturation stage of nearly every wine.
  • Traditional Rioja and Bordeaux cellars, where regular racking is part of the house style.
  • Decanting at the table — the same idea, at bottle scale.

What racking does to the wine

Effect Consequence
Clarifies Removes lees, reduces the need for aggressive filtration
Aerates Softens tannin, helps colour stabilise, blows off reductive notes
Oxidises (mildly) Cumulative — too many rackings tire a delicate wine
Mixes Homogenises a barrel or tank before blending or bottling
Loses volume Every transfer leaves a little wine behind

Racking or not?

  • Rack more for structured reds, where the oxygen helps tannin polymerise and the wine can take it.
  • Rack less for aromatic whites and delicate reds, where the goal is fruit and freshness, and where the lees themselves protect the wine.
  • Not at all in some natural-wine cellars, where the wine goes straight from vessel to bottle — clarity by patience rather than by intervention.

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