I have those fitted as well as OE top bearings. Some scoffed at their use as under compression of suspension the stub axle lifts off the rebound spring, conveniently forgetting that it's under compression by inner wheel when cornering as it limits roll. I know it lightens steering though.
See this video (posted many times before) which illustrates front suspension operation.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone