Grinders
Why 58mm is the Standard of Real Espresso？
Choosing the right brewing head is one of the keys to making great coffee. Currently, the most common brewing heads on the market are 51mm and 58mm, but how should you choose between them?
Differences Between 51mm and 58mm
With the same amount of coffee grounds and extraction time, the coffee bed in a 51mm portafilter is relatively thicker, resulting in a smaller surface area of the coffee puck in contact with water. This helps maintain consistent pressure within the portafilter, reducing the channeling during extraction. However, the thicker coffee bed decreases water penetration, which can lead to lower extraction efficiency and under-extraction.
In contrast, the coffee bed in a 58mm portafilter is thinner, which increases the surface area of the coffee puck in contact with water and improves water penetration. This enhances extraction efficiency. When paired with a 58mm brewing head, a stainless steel single-layer filter basket, and a high-density dispersion screen, extraction becomes more thorough.
The advantages of a 58mm portafilter:：
- Increased extraction: The larger size allows for more coffee grounds, leading to a higher extraction yield and a stronger, bolder flavor.
- Greater precision: Due to its larger size, it’s easier to distribute the coffee grounds evenly, which can result in a more consistent extraction.
- Compatibility: The 58mm size is a more common size, which means that it’s easier to find accessories and replacement parts for it.
If you’re serious about espresso, 58mm is not just a specification — it’s a standard trusted by professionals worldwide.
The difference starts with extraction.
A wider 58mm portafilter allows water to flow more evenly through the coffee bed, reducing channeling and improving consistency. The result? A more balanced cup with deeper flavor clarity, richer body, and a cleaner finish.
But it doesn’t stop there.
58mm is the industry benchmark used in commercial machines — which means full compatibility with professional tools and accessories. From precision baskets to calibrated tampers and puck screens, everything is designed to help you refine your workflow and elevate your results.
Whether you’re dialing in shots at home or serving customers in a busy coffee cart, consistency is everything. And consistency is exactly what a 58mm system delivers.
This is why experienced baristas don’t compromise.
This is why professionals choose 58mm.
At Koryaiko Philippines, we bring that same professional standard into your daily setup — giving you the tools to brew with confidence, precision, and control.
