The difference in mean body size between males and females within a given species is termed sexual size dimorphism (SSD). Spiders are known for extreme examples of sexual size dimorphism with the females being much larger than the male. The Gravity Hypothesis was devised in order to explain this female biased SSD. The hypothesis states that the average climbing speed a spider can reach is inversely proportional to its length therefore it would be advantageous for the male to be small. In this study I examined the affects of spider body size and shape on climbing and bridging speed by conducting trials in a simulated environment in which an adult male Aurantia trifasciata climbed at angles naturally occurring in the environment. Bridging was evaluated in a 'mock' bridging environment in which the spiders transverse two fixed points. The results from this experiment were found to be contrary to the predictions of the Gravity Hypothesis as originally formulated, but in accordance with the predictions of the modified Gravity Hypothesis. It was found that males with relatively longer limbs and larger abdomens, were able to run and bridge faster, thus alluding to a possible advantages in mate search.