Having ABS on only one axle: Question Having ABS on only one axle: Answers Does not change braking in any way. Is not possible. Will allow the driver additional control over their vehicle when braking. Will cause extra strain on the other axles. Explanation Having an Anti-Lock Braking System (ABS) on only the trailer, or even on just one axle, will still provide a driver with additional control over the trailer when braking. This questions appears in the following tests: Alabama Double Alabama Tank Connecticut Combination Georgia Combination Illinois Combination Kansas Combination North Dakota Combination Texas Combination