My Yakima roof rack has been with me through two cars and 6 bikes so far. With four bikes loaded on top, including wheels on wheel forks, we did a 7000 mile road trip over the summer a few years back and all was well. I put bike bras on my road bike and Wifey's MTB, but other than that they're all exposed to the elements. We carry bikes like this pretty often with no problems. Just be aware of the height of your vehicle and you'll be fine.