I started with the stock Ryler windshield on my Rally. It was relatively efficient at keeping wind from blowing me off the seat at highway traffic speed. However, it was loud, really loud, even with my earplugs. I switched to a CalSci in the medium height. The CalSci is much quieter, reduces wind on my shoulders, but still provides enough air to stay cool. I have not noticed any significant difference in the size of the CalSci shield on steering. If anything, my handlebar inputs are less influenced by a wind gusts on my shoulders. The CalSci is less sporty and stylish the than the stock but is more functional. At my age sporty and stylish is less important than performance. Further, I have not seen any difference in fuel mileage with the larger screen.