IMS Competition B702TCH28.5E – Convex, 58 mm, 18–22 g (Bottomless Only)
In a bottomless portafilter, the espresso gathers into a single, central stream – calm, glossy, focused. That is exactly what the convex base of this basket is built for: it deliberately guides the coffee towards the centre during extraction.
Nobody needs a competition basket to pull a good espresso – the original basket does its job. You want it because the extraction becomes clearer, rounder and more beautiful in a bottomless portafilter. That is one of many possible decisions, and we respect it either way.
What Makes This Basket Special
The "C" in the name stands for Convex: the convex base guides the flow to the centre and creates the focused central stream in a bottomless portafilter. The 715 round holes with a conical cross-section in a hexagonal pattern are a patented IMS innovation – for a dense crema and even flow right to the edge. Ridgeless and made of high-gloss polished AISI 304 stainless steel: less coffee residue, easier knocking out, a long service life. Espresso is extraction via a weight ratio, usually 1:2; what you taste is density, sweetness and a long finish. It is our observation that the choice of basket fundamentally changes the aroma profile.
At a Glance
| Manufacturer |
IMS Competition (B702TCH28.5E), Italy |
| Material |
Stainless steel AISI 304, high-gloss polished |
| Perforation |
715 conical holes, Ø 0.30 mm, hexagonal (E) · perforated Ø 49 mm |
| Base / Design |
Convex (C) · cylindrical, ridgeless |
| Dose |
18–22 g (2–3 cups) |
| Height |
28.5 mm |
| Compatibility |
Bottomless 58 mm portafilters only · Tamper Ø 58–58.4 mm |
Who It's For
For anyone who loves the focused central stream in a bottomless portafilter and doses high (18–22 g) – every budget is welcome. Important: at 28.5 mm high, this basket is intended exclusively for bottomless portafilters; it is too tall for most standard portafilters with a base. If you dose lower or use a standard portafilter, take a look at the flat Competition variants. You belong here because you love coffee – not because you run a particular basket.
What Goes with It
A must for this basket: a bottomless portafilter. For a level puck: the tamper collection – affordable with Normcore, premium with Weber Workshops. Against clumps beforehand: WDT tools. Plus the right grinder. All other baskets: precision baskets collection.
Frequently Asked Questions
Does the basket fit a standard portafilter?
No – at 28.5 mm high, it is suitable exclusively for bottomless portafilters. It is too tall for most standard portafilters with a base.
What does the convex base do?
It guides the coffee to the centre and creates a focused, central stream in a bottomless portafilter – a dense, round extraction, both visually and in taste.
What dose?
18–22 g, depending on grind size and roast (2–3 cups). The basket height of 28.5 mm provides enough space for higher doses.
Does it fit my machine?
It is compatible with all common 58 mm E61 brew groups – including La Marzocco, Rocket, ECM, Bezzera, Rancilio, Faema, Nuova Simonelli, Victoria Arduino, Wega – provided you use a bottomless portafilter.
Can I see the basket before buying?
Our showrooms in Bern (Gerberngasse 44) and Zurich (Hagenholzstrasse 50b) show a wide selection, but not our entire range – the display changes. Drop us a quick line at [email protected] before your visit, and we will check whether the product you have in mind is currently there.
Roastery Tip
A consistent basket rewards dense, aromatic beans the most. From our coffee roastery, Cozy Chocolate and Nutty Delight pull through full-bodied and round – a beautiful, dense central stream in a bottomless portafilter. If you are looking for maximum body without any acidity, stay with Very Nutty; if you like it fruity, discover a lively peach note with Wild Peach. Our recommendation – one of many.
