The ideal PSI for your bike fork is not a universal number; it primarily depends on your rider weight and the specific fork model. The suggested air pressure settings aim to achieve the correct sag, which is crucial for optimal suspension performance.
Understanding Fork Sag
Sag refers to the amount your suspension compresses under your own weight when you are in your normal riding position. For a balanced and effective ride, sag should typically be set to 15 - 20% of the total fork travel. This range allows the fork to absorb bumps effectively and maintain traction across various terrains.
Suggested PSI Settings for 32mm AX Forks
For 32mm AX forks, the following table provides recommended starting points for air pressure based on rider weight. These are initial guidelines to help you get close to your ideal setting.
| Rider Weight (lbs) | Rider Weight (kg) | Suggested Air Pressure (psi) |
|---|---|---|
| 120-150 | 54-68 | 70-80 |
| 150-180 | 68-82 | 87-97 |
Fine-Tuning Your Fork PSI
These values are starting points. After setting your initial PSI based on your weight, it's essential to fine-tune it for your riding style and terrain.
- Measure Sag: After setting the initial PSI, sit on your bike in your riding gear and measure the sag to ensure it falls within the 15-20% range. Adjust PSI up or down in small increments (e.g., 2-5 psi) until the desired sag is achieved.
- Ride and Test: Take your bike for a ride on familiar trails. Pay attention to how the fork feels.
- If you're bottoming out too easily (using all the travel frequently), you might need to increase the PSI slightly.
- If the fork feels too stiff and isn't using its full travel, you might need to decrease the PSI.
- Optimal Performance: The goal is to find a pressure that provides a balance between absorbing impacts, maintaining traction, and preventing harsh bottom-outs.
