Coxreels offers new options for Challenger Series reels The roller bracket assembly is available only in a 4-way upper roller format. Coxreels is introducing the new roller bracket assemblies for the Challenger Series. The function of the roller bracket, as it is on other models such as the 1125-Series and the 1175-Series, is to assist in guiding the hose during both extension and retraction. The roller bracket assembly is available only in a 4-way upper roller format, due to the compact size of the Challenger platform. For 12” disk Challenger models, the roller bracket assembly is available for 8” wide drums and 12.5” wide drums. For 17” disk Challenger models, the roller bracket assembly is available for 8” wide drums, 12.5” wide drums, and 18” wide drums.