I've had real spikes, Trellborg, Mitas and other similar carbide spikes so I decided to try and compare them. They appear to be identical to the spikes, but the quality isn't nearly as good. They are installed and held in rubber in the same way, but the carbide core breaks. I'm not sure if the solder is loosening or cracking, but the carbide just keeps disappearing. I drove 30 minutes and lost a dozen carbide cores. It was 99% frozen clay with a few inches of snow. There are almost no stones on