Input lever
Coffee Material
Wheel face
Origin
The geographic and agricultural source of the coffee.
AeroPress Wheel Variable
Bean fragility
Coffee Material · Process state
How easily the beans fracture during grinding.
Process state
Coffee Material
Advanced detail
Technical science
Inferred
Definition
Fragility describes how prone the coffee is to cracking into fines or uneven fragments under grinder stress.
Why It Matters
Fragility influences fines production, PSD width, and sometimes static behavior.
Page Context
Bean fragility is part of the Brew Supply AeroPress Wheel and helps brewers describe how easily the beans fracture during grinding.
Related variables
Input lever
Coffee Material
Detail panel
Variety
The genetic variety or cultivar of the coffee plant.
Input lever
Coffee Material
Wheel face
Process
How the coffee was processed after harvest.
Input lever
Coffee Material
Wheel face
Roast level
How light or dark the coffee was roasted.
Input lever
Coffee Material
Detail panel
Roast development
The internal development of the roast, not just the color.
Input lever
Coffee Material
Detail panel
Roast date
The date the coffee was roasted.
Affected outcomes
Measured metric
Cup Outcome
Wheel face
Beverage TDS
Measured total dissolved solids in the served beverage.
Calculated metric
Cup Outcome
Wheel face
Extraction Yield
Calculated percentage of coffee mass extracted.
Measured metric
Cup Outcome
Wheel face
Beverage Yield
The liquid beverage mass collected or served.
Cup outcome
Cup Outcome
Wheel face
Aroma
The smell of the brewed coffee.