What started as serious fun has quickly become a serious change to what we want out of bike the fat revolution is here and with races becoming more and more prevalent we knew that our much heralded fatboy could stand to go on a diet introducing the new s works fatboy carbon it features an immaculate fact carbon fibre construction with internal cable routing to ensure that it39s light stiff and ready for nasty elements we then spec39d it with sram39s venerable one by groupset x