Quick verdict
This is Normcore's V4 spring-loaded, self-leveling tamper in 58.5 mm, for the common 58 mm portafilter format. It comes with the same three springs and stand as the 53.3 mm version. It suits 58 mm machines like the Gaggia Classic Evo Pro, which ships with a plastic tamper. Basket inner diameters vary between makers, so a 58.5 mm base can be snug in some 58 mm baskets. Normcore also sells 58 mm and 57.5 mm sizes.
Buy it if
- You have a 58 mm portafilter and want a level, repeatable tamp.
Skip it if
- You don't know your basket's inner diameter; check it first.
- Best for
- 58 mm machines like the Gaggia Classic Evo Pro, or the Flair 58 Plus 2.
- Main compromise
- Basket diameters vary, so confirm your basket's inner size.
- Fits
- 58 mm portafilter baskets (check the basket's inner diameter)
- Size
- 58.5 mm flat base with leveling plate
- Springs
- 15, 25 (installed) and 30 lb
Specifications
| Spec | Detail and source |
|---|---|
| Fits | 58 mm portafilter baskets (check the basket's inner diameter)Manufacturer: Normcore |
| Size | 58.5 mm flat base with leveling plateManufacturer: Normcore |
| Springs | 15, 25 (installed) and 30 lbManufacturer: Normcore |
| Included | Tamper, stand, three springsManufacturer: Normcore |
| Care | No dishwasher, strong detergent or soakingManufacturer: Normcore |
Choosing 58 vs 58.5 mm
Normcore sells the V4 in both 58 mm and 58.5 mm (Normcore). A nominal 58 mm portafilter tells you the group size, not the exact inner diameter of every basket. Measure the basket, or check the basket maker's spec, before choosing. We have not verified the fit in specific baskets.
Strengths and limitations
What stands out
- Self-leveling plate and three springs.
- Fits a common standard used by many machines.
Limitations
- Basket fit varies.
- Hand wash only.
Our recommendation
I'd recommend the 58.5 mm V4 to 58 mm machine owners, once they've confirmed their basket size.
Amazon listing: V4 58.5 mm, flat base, with 15/25/30 lb springs
Sources
- Normcore Spring Loaded Tamper V4 — Normcore. Manufacturer. Accessed September 26, 2026.