What size portafilter does the Rocket Espresso R Nine One use?
The Rocket Espresso R Nine One uses a 58mm portafilter (58mm (saturated group)).
Do standard 58mm baskets fit the Rocket Espresso R Nine One?
Yes — the Rocket Espresso R Nine One uses the 58mm commercial standard, so standard 58mm baskets fit. Depth and shape still vary between baskets, so check the individual entries below.
Does the Rocket Espresso R Nine One take pressurized or non-pressurized baskets?
It uses non-pressurized baskets.
Which baskets are confirmed to fit the Rocket Espresso R Nine One?
IMS B70 Competition 1 Cup (B701TH26.5E); IMS B70 Competition 1 Cup H24.5 (B701TH24.5N); IMS B70 Competition Convex 2 Cup (B702TCH26E); IMS B70 Competition 2 Cup H24.5 (B702TH24.5M) — each verified against manufacturer sources (listed below).
Sources
https://rocket-espresso.com/pdf/ROCKET_Domestic_Catalog.pdf(archived) — Official Rocket Espresso domestic catalogue, read firsthand 2026-07-15. The R Nine One page states verbatim it is 'Equipped with a fully saturated group, dual stainless-steel boilers, PID temperature control and a full pressure-profiling system'. The catalogue prints no portafilter diameter, and this is a saturated group (not E61), so the 58mm figure rests on the measured source below.
https://www.imsfiltri.com/IMS-competition-Catalogue.pdf(archived) — Official IMS Filtri competition catalogue, read firsthand 2026-07-13. Its B70 (tamper 58 / 58.4 mm) list — headed 'E61 & compatible groups' and explicitly including saturated-group makers such as LA MARZOCCO, SLAYER and SYNESSO — names ROCKET among the 58mm brands. A basket maker's measured fitment, the basis for the diameter here.