Callaway Quantum Max Fast vs Callaway Quantum Max OS
Side-by-side factory specifications. Differing values are highlighted.
Callaway Quantum Max Fasttwo-piece Modern 360° Undercut cavity body with a Progressive Tri-Sole and urethane microspheres · steel body with a next-generation Ai-optimized face (Callaway does not publish the alloy)Callaway Quantum Max OStwo-piece Modern 360° Undercut cavity body with a Progressive Tri-Sole and urethane microspheres · steel body with a next-generation Ai-optimized face (Callaway does not publish the alloy)
Specification comparison
| Club | Quantum Max Fast loft | Quantum Max OS loft | Quantum Max Fast lie | Quantum Max OS lie | Quantum Max Fast length | Quantum Max OS length |
|---|---|---|---|---|---|---|
| 4 | — | 19 | — | 60.375 | — | 39.125 |
| 5 | 22 | 22 | 60.75 | 61 | 38.75 | 38.5 |
| 6 | 25 | 25 | 61.375 | 61.625 | 38.125 | 37.875 |
| 7 | 28 | 29 | 62 | 62.25 | 37.5 | 37.25 |
| 8 | 32 | 33 | 62.5 | 62.875 | 36.875 | 36.625 |
| 9 | 37 | 37 | 63 | 63.5 | 36.25 | 36 |
| PW | 42 | 42 | 63.25 | 63.75 | 36 | 35.75 |
| AW | 46 | 47 | 63.5 | 64 | 35.75 | 35.5 |
| GW | 50 | 51 | 63.75 | 64 | 35.5 | 35.5 |
| SW | 56 | 55 | 64 | 64 | 35.25 | 35.25 |
Highlighted cells differ between the two sets. Lofts and lies are factory standard.
Which should you choose?
The Quantum Max OS is the weaker-lofted set — up to 1° weaker than the Quantum Max Fast. That trades raw distance for a steeper landing angle and more predictable stopping power into greens.
Both charts are reproduced in full on their own pages: Callaway Quantum Max Fast specs and Callaway Quantum Max OS specs.