Samson manufactures truck tires, tractor tires, forklift tires, skid loader tires and other tires for industrial or agriculture use, as listed on NebraskaTire.com. The Chinese company GTC manufactures the Samson brand of tire in Guiyang, China, according to the company's official website.
GTC, or the Guizhou Tyre Company, was founded in Shanghai before moving to Guiyang in 1958. GTC is internationally certified, having earned its ISO9001, ISO14001, NHTSA DOT, E-Mark and Gulf Standards GCC certifications, according to the company's website.
As of August 2015, you can contact GTC's North American subsidiary, GTCNA, via the form on their website, via phone at 330-498-5000, or via email at email@example.com.