Abstract: A turf aerator device for attachment to regularly disposed vehicle wheels, including lawnmower wheels. The device comprises two armed attachment bracket, a sliding attachment bracket, a locking pin plate and a plurality of penetrating spikes. The device easily attaches to the lawnmower wheels by hand, without any modification to, removal of, or elevation of the wheels. The spike mechanisms penetrate the lawn surface by using the weight of the lawnmower and accompanying wheel rotation, as the lawn is being mowed. Without interruption or adjustments during use, the spikes will penetrate lawn surface and retract when wheels roll over hard surfaces, preventing any damage to driveways, walkways and other surrounding surfaces.