Does beam thickness of a racquet affect a tennis shot at all? I noticed the old prostaff's are around 17mm and the new SurgeX prostaff I have is 26mm. I liked the SurgeX for flat serve but then my groundstrokes suffered maybe due to the lighter head, but also maybe since I am a bit of a spin doctor and maybe sometimes the ball was catching the thicker than normal frame on these spin shots. Why has beam thickness increased? Does it make vollies more or less solid? Does it increase overal stiffness of the frame? Just curious as to why manufacturers have gone from 17mm to 26mm, although most frames are still in the 20-23mm range. I plan to go back to frames with smaller beams so I don't catch the frame so much on my spin shots. But will I really notice any difference or is it just in my head?