IMS Competition B702TCH28.5E – Convex, 58 mm, 18–22 g (bottomless only)
In a bottomless portafilter, the espresso converges into a single, central stream – calm, glossy, focused. This is precisely what the convex base of this basket is designed for: it precisely directs the coffee towards the center during extraction.
Nobody needs a competition basket to pull good espresso – the original basket does its job. You want it because the extraction becomes clearer, rounder, and more beautiful in a bottomless portafilter. This is one of many possible decisions, and we respect both directions.
What makes this basket special
The "C" in the name stands for Convex: the convex base directs the flow to the center and creates a focused central stream in the 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 to the rim. Ridgeless and made of highly polished AISI 304 stainless steel: less coffee residue, easier knocking out, long lifespan. Espresso is extraction based on 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, highly 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) – any budget is welcome. Important: At 28.5 mm high, this basket is exclusively for bottomless portafilters; it is too tall for most standard portafilters with a base. Those who dose lower or use a standard portafilter should look at the flat Competition variants. You belong here because you love coffee – not because you use a specific basket.
What goes with it
A must for this basket: a bottomless portafilter. To level the puck: the tamper collection – affordable with Normcore, premium with Weber Workshops. To prevent clumps beforehand: WDT Tools. Plus the right grinder. All other baskets: Precision Baskets Collection.
Frequently Asked Questions
Does the basket fit in a standard portafilter?
No – at 28.5 mm high, it is only suitable for bottomless portafilters. It is too tall for most standard portafilters with a base.
What does the convex base do?
It directs the coffee to the center and creates a focused, central stream in a bottomless portafilter – visually and tastefully a dense, rounded extraction.
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 58mm 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?
Yes, in our showrooms in Bern (Gerberngasse 44) and Zurich Oerlikon (Hagenholzstrasse 50b).
Roastery Tip
A consistent basket rewards dense, aromatic beans the most. From our coffee roastery, Cozy Chocolate and Nutty Delight extract full-bodied and round – in a bottomless portafilter, a beautiful, dense central stream. If you are looking for maximum body without any acidity, stick with Very Nutty; if you like fruity notes, discover a lively peach note with Wild Peach. Our recommendation – one of many.
