The application of neodymium based cis-1. 4-polybutadiene rubber (Nd-BR) BR 9101 N in the formula of support compound of run-flat tire was studied. and compared with those of foreign same type product Nd-BR CB 24. The results showed that Nd-BR BR 9101 N could meet the requirements for incoming inspection of Nd-BR raw material. https://www.manorphxes.shop/product-category/accessories/