Pushing an image to a drive, depending on what image tool your using, most will push an image to a drive maintaining the original partition dimensions of targeted partitions when image was created.
Guessing your talking about the Remix OS x86 PC version .... pretty sure this is based off of Linux, but not finding much info on which flavor of Linux was used for the core kernel etc.
Most installers these days give option to set the dimensions of the install. Does the install process prompt you to give you control over this?