Unyielding performance and powerful braking are the hallmarks of the Racer kit. Designed specifically for road bikes the Racer kit will provide consistent smooth shifting and amazingly powerful braking. The Racer kit features Jagwires 4mm derailleur housing lined with its proprietary L3 liner technology. For the brakes we use Jagwires legendary KevlarR reinforced compressionless Ripcord housing w proprietary L3 liner. Tech: Derailleur. Housing: 4mm reinforced LEX derailleur housing w L3 liner. Housing Length: 1500mm. Cables: Slick stainless, double ended SRAMR ShimanoR. Cable Length: Front 2300mm, Rear 2300mm. Small Parts: Sealed alloy ferrules, donuts, Tube Tops tips. RCK005 Derailleur Housing: 4.5mm Braided. Tech: Brake. Housing: 5mm kevlarR reinforced compressionless brake housing w L3 liner. Housing Length: 1600mm. Cables: Slick stainless, double ended SRAMR ShimanoR. Cable Length: Front 850mm, Rear 1650mm. Small Parts: Open alloy ferrules, donuts, Tube Tops, tips and 2 EZ Bend segments.