アルト(Alt)とはドイツ語で「古い」という意味で、ラガービールが発明される以前からドイツで作られていた事に由来する。琥珀や銅の色をしており、ドイツ産モルトのアロマと味の手ごたえがある。
ドイツ産のノーブルホップが効いた苦味の強さがあり、アロマは弱めだがフルーティでフローラル。味わいがありながらも、シャープで後味がドライな、すっきりした飲み口のよいビール。
<このビールスタイルのBrewers Associationによる解説>
German-Style Altbier
- Color: Copper to dark brown
- Clarity: Clear to slightly hazy. Chill haze should not be present
- Perceived Malt Aroma & Flavor: A variety of malts contributes to medium-low to medium malt aroma and flavor. Toast aroma typical of Munich malts should be present. Slight nuttiness is acceptable. Roast malt character should be present at low levels and well-integrated with the overall malt profile. Smoke character should not be present.
- Perceived Hop Aroma & Flavor: Low to medium with hop flavor more perceptible than aroma, with attributes typical of traditional German noble hops.
- Perceived Bitterness: Medium to high, producing a clean dry finish. Forty-plus IBU is typical for Altbiers originating in Dusseldorf.
- Fermentation Characteristics: Fruity esters are absent to low, with attributes expressed subtly as citrus, pear, dark cherry or plum. A slight sulphur aroma is acceptable. Diacetyl should not be present.
- Body: Medium-low to medium.
- Additional notes: The Altbier style is originally from the Dusseldorf area. The overall impression is clean, crisp and flavorful with a dry finish.
Original Gravity (°Plato) 1.044-1.052(11-12.9 °Plato) •
Apparent Extract/Final Gravity (°Plato) 1.008-1.014(2.1-3.6 °Plato) •
Alcohol by Weight (Volume) 3.6%-4.4%(4.6%-5.6%) •
Bitterness (IBU) 25-52 •
Color SRM (EBC) 11-19(22-38 EBC)