Kinesis racelight 4s disc road framesetthe aim of the 4s is to provide a bike that will be worthy of use throughout the four seasons and it has undeniably succeeded the frame is responsive agile and punchy but these qualities are offset with equal amounts of comfort featurestuned kinesium tubing delivers unrivalled comfort shimano flat mount disc and rim brake ready full internal cable routing and di2 compatibility integrated mudguard and rack mounts specifications headtube designtapered f