On day three of SEMA Week, Fred Williams explores the world of Off-Road at the 2013 SEMA Show. From purpose-built rock crawlers to innovative products, he provides an insight into what the SEMA Show offers the Off-Road enthusiast.On day three of SEMA Week, Fred Williams explores the world of Off-Road at the 2013 SEMA Show. From purpose-built rock crawlers to innovative products, he provides an insight into what the SEMA Show offers the Off-Road enthusiast.