Don't get those folding type J-racks. Those pivot points will fail if you use them a lot. Go with the all steel Amazon versions Amazon.com . This is what I used and it's been lasting me for 3 years or so. I used them on the stock crossbars but you'll have to get longer bolts to fit the clamps. Don't forget to go with stainless steel bolts, nuts, and washers. Here are some pics of my setup. Hope this helps.