Tamiya hop up Options No.1603 OP.1603 WR-02 monster spike tire soft 54603 Made by Tamiya; Tamiya is a Japan based company; parts are sourced from Global producers Tamiya part number 54603; UPC 950344546039 This item works with: Tamiya G6-01 Konghead, Lunch Box, Wild Willy 2 - Wild Willy 2000