It is a challenge fitting all four wheels in the car (E92). It can be done, but its not easy, when you have all the other crap you need. Tires, Jack, bin full of tools, helmet, beach style chair(s), cooler, spray water can, and a second passenger..
I usually put three in the back, with the bin and a suitcase for longer trips, one in the trunk with the floor jack, disassembled, one or two beach chairs, an umbrella, pop up ten, cooler, 2 gal. spray bottle and I think that's about it.
I've opted to purchase a featherlite 3110. Should be here in a few weeks. Life will be so much easier..