Project X IO takes the DNA of the popular PXi shaft and evolves it by having each shaft flex designed with a specific weight and trajectory progression in mind. As Project X IO increases in flex, it gets 5g heavier and is geometrically modified to launch lower–providing an individually optimized shaft for each flex.
| Shaft | Flex | Weight | Length | Tip Dia | Butt Dia | Spin | Launch |
| Project X IO | 5.5 | 105 | 40.5 – 36.5 | .355 | .600 | Mid – High | Mid – High |
| Project X IO | 6.0 | 110 | 40.5 – 36.5 | .355 | .600 | Mid | Mid |
| Project X IO | 6.5 | 115 | 40.5 – 36.5 | .355 | .600 | Mid – Low | Mid – Low |
