the fans i literally installed 2-3 weeks ago, its a new pc build. I also noticed that at higher speeds (1400-1700 RPM) it completely stabilizes but at lower speeds (800-1000 RPM) it wobbles a bit but there's no noisewhilst dusting off my PC I realized that my fans wobble a bit, is this okay?
Under operation, does the fan have a rattling nose to it or is brushing up against the fan's housing if not, you can ignore the wobble. How long has the fan been in operation in your build?
If so, then yes that fan is bound for replacement.