I don't have a roof rack either, could probably not lift the bikes way up there any way. I have great confidence in my RoadeGear trunk mount 1 bike rack. BUT I got in my first ride out in the open today, first since New Years. 32 miles on the Schuylkill River Trail. 90% clear and dry and 10% ice and slush packed with a few flooded sections: 2" deep water. But I did it and got back to the car, put the Trek ZX7000 on the rack and headed out onto the freeway. About 3 minutes later I look in the mirror and the rear of the bike has come loose from the rack. 70mph in the left lane and the bike is wagging in the wind, lashed by the front tt strap and the front wheel tied to the rack. Oh, rush hour traffic - high speed close order racing home.
I flipped the car over onto the shoulder, hit the flashers and got the bike secured again. I checked it every 20 or 30 seconds after that until I was off the freeway. Yup, my imagination was whirling away with visions of that bike flying off the back and right under a dozen cars in about 6 seconds. What an ellofamess that would have been. Yikes.