Mookulater

Confirming others: road bikes fit on this! You can hang it by the handle bars or by the head tube. Head tube seems better to me since it's a weird direction to be putting force on your handle bars, but would love to hear an engineer's perspective. I fit three road bikes on my NSR4 yesterday, by reversing one bike so that the tires were facing out. If I had gotten it just right, I think I could have fit a fourth, but not easily. I've also done it with one road bike and one mountain bike easily. It has a few drawbacks: 1. Some road bikes are a little harder to maneuver onto the rack than others, just based on the angles of the frame. 2. The bikes do make contact with the steel part of the rack, both under the head tube and in one spot on the down tube. I drape a cloth rag over the rack hook first as a cushion, and it prevents scratches. 3. The handle bars are loose if you hang by the head tube, so they can swing around and ding your frame. I take some string and tie them in place (also to prevent spinning wheels). 4. Some bike's brake cables can get pinched against their frames. No harm any of the times I've done it, but I could imagine damage on a rough road. All around, I'll probably get adapters when they're available, but it's actually just fine with road bikes!

I have one installed on my Toyota Sienna which has about that much clearance. The bottom of the rack will scrape on really steep hills or big speed bumps, but the bike tires are well clear of the ground. I don't think there's any way they would drag.