Dumina / Shaft Specs
Shaft Specs
Every model, every spec, in one place. CPM is listed as a factual figure — fitting is guided by swing speed and tempo, never by CPM comparison.
autoFlex Original
Driver · Wood · Hybrid · Iron · Putter
Pink · Rainbow · Yellow · Black
Use the head-speed range as a starting point, then confirm your choice through fitting and swing tempo.
Driver — 45"
| Spec | Weight (g) | CPM | Your head speed (mph) |
|---|---|---|---|
| SF305X | 41 | 170 | 70–90 |
| SF405 | 45 | 190 | 85–100 |
| SF505 | 50 | 210 | 95–105 |
| SF505X | 55 | 215 | 100–110 |
| SF505XX | 57 | 220 | 110–120 |
Wood — 43"
| Spec | Weight (g) |
|---|---|
| SF405 | 43 |
| SF405X | 45 |
| SF505 | 50 |
| SF505X | 55 |
| SF505XX | 57 |
Hybrid — 41"
| Spec | Weight (g) |
|---|---|
| SF405 | 49 |
| SF405X | 51 |
| SF505 | 55 |
| SF505X | 57 |
Iron — 39"NEW · APR 2026
SF305: Pink only. SF405 and SF505: Pink, Rainbow, Yellow and Black.
| Spec | Weight (g) | CPM |
|---|---|---|
| SF305NEW | 47 | 220 |
| SF405 | 50 | 230 |
| SF505 | 53 | 240 |
Putter — 34" · 36"
One autoFlex putter shaft, available in Original and Flex One designs. Both designs share the same specifications.
| Length | Weight | Tip | Butt |
|---|---|---|---|
| 34" | approx. 110 g | 9.45mm (0.370") | 15.4mm (0.606") |
| 36" | approx. 110 g | 9.45mm (0.370") | 15.65mm (0.616") |
Tip measured 0.25" from the tip end; butt measured 1" from the butt end.
Lengths vary by product and club; refer to each specification table. Fit by swing speed and tempo, and confirm the setup guidance for the selected product before assembly.