You may want to consider one of the new hybrid style tents. The Big Agnes Sarvis SL-1 is single walled in the foot end, mesh with rainfly in the head end. It is only 2-3 square feet smaller than many of the light two person tents, its walls are relatively vertical (so the floor space is usable/real) and it weighs in at only 2 lbs 12 ozs.
I bought one, but have not used it yet. My goal was weight savings and I plan to use it similar to your goals = biking with a BoB.
It is sold as being freestanding and appeared so in my living room. But that status is often questionable and it varies with the conditions.
In addition to the weight savings of the tent itself - be forewarned that your wallet too will be much lighter.
Last thing - I read reviews by other owners and they were highly favorable. I do not remember where the reviews were published, but lets hope they are authentic.
I won't have a chance to use mine extensively for several months, so I won't be able to get back to you with more feedback.
Good luck!!