Made In the San Francisco Bay Area
GigaYeast, Inc.

Altstadt Ale GY016

Attenuation Medium Gravity*                        77% – 81%

Attenuation High Gravity*                              51% – 54% (6.7% – 7.3% ABV)

Temperature Range:                                   55˚F – 68˚F

Flocculation:                                                  Low


An ale yeast that ferments at cold temperatures and produces a lager like ale style with a hint of fruity esters.  Leaves a slight residual maltiness perfect for traditional Kölsch and Alt styles.


Representative Styles:

Kölsch                        California Common

Altbier                        Biere De Garde

Cream Ale           


* Medium Gravity is 14˚ – 16˚Plato.  High Gravity is 23˚- 25˚Plato. 

  The working temperature range represents the range at which fermentation for a given strain produces a typical attenuation- not necessarily the ideal temperature for your particular beer style.  As a rule of thumb, start ale yeast fermentation at 68˚ – 72˚F and then lower or raise temp as desired.  Lager Yeast are typically fermented at 45˚ – 58˚F.  If desired, Lager Yeast can be given a “hot start” at 65-68˚F and then lowered to the primary temperature after active fermentation begins (10-20hrs). 

GigaYeast laboratory is still gathering data on many of our strains.  Information provided here may change some in the future.  Please call if you need more info.