Determinism and Sartre

Sartre's idea of radical freedom of course conflicts greatly with any concept of determinism but then it is still possible for the two ideas to coexist in  some context. Determinism eliminates any possibility of free will, but even if you fully accept the concept of determinism no one can possibly conceive whatever path has been determined. So even if you believe fully in determinism you can not simply stop making choices(even to stop making choices would be a conscience choice) . For every aspect of our lives that we can actually perceive, it does seem as though everything relies on our choices and as Sartre( in his early works) would argue we are alone in our minds to make these choices.