>>1536513depends on the car shape, but for sedans i like left of pic related, solid thing for cheap.
right of pic related is likely to break the car nut on what it's mounted. you must spend good cash just to avoid the breaking, not to get a good quality stuff.
>>1536506maybe the clamp which attach the seatpost and the seat itself could be not enough tight. when interact with that bolt, use long allen wrench.
another creak reason could be dust, sand or garbage inside the seattube or in the external surface of the seatpost. clean both of them any shit they have and report results.
