From their website:
The GAIA model should be selected based on the weight that they are supporting. The weight limits we set are based on the performance curve. The GAIA perform well up to the specified weight limits, but once you are within 10% of the weight limit, we recommend using the next size up for best results. We do not recommend exceeding the weight limits of the GAIA’s or GAIA-TITAN’s.
The GAIA model should be selected based on the weight that they are supporting. The weight limits we set are based on the performance curve. The GAIA perform well up to the specified weight limits, but once you are within 10% of the weight limit, we recommend using the next size up for best results. We do not recommend exceeding the weight limits of the GAIA’s or GAIA-TITAN’s.