The specialized royal traverse sl fattie 650b wheel set the roval traverse sl fattie 650b 148 wheels work to provide more traction stability and speed the extra width also allows for more tire volume which means increased suppleness in the ride quality and not only this but the ample width also better supports the tire meaning that you39ll experience less burping when riding tubeless these wheels also include the roval tubeless plug system which is an easy and super lightweight