Should I switch to the thin spare wheel

Friends take a lot of space in my lpg trunk. I say I go to the simit tank and handle it with a thin spare wheel, but I do not know how much space the thin spare wheel occupies in the trunk ... I am using a thin spare wheel and are satisfied with the volume of the luggage .. just because of this, I bought a thin spare wheel but it is also very large .. beer thinner than normal spare wheel okadar. Not a tiny teen.