Ruggedized Wheel Problems

I'm having a problem with my new mobile base. When loaded onto the launch pad or runway, it bounces/shimmies until the TR-2L ruggerized wheels break, or in a few cases the launch pad explodes. The base masses 46.5 tons, and there are 40 wheels in 4 banks of 10. Pictures below of the the base and the wheels. I have another similar mobile base with the same wheel arrangement that does not bounce until it explodes.Ruggedized Wheel Problems

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