WTB Frequency TCS i23 Rim TCS - The tubeless compatible TCS rim profile is especially designed for TCS or UST tires and is also compatible with tube type tires when used with tubes TCS - The tubeless compatible TCS rim profile is especially designed for TCS or UST tires and is also compatible with tube type tires when used with tubes TCS - The tubeless compatible TCS rim profile is especially designed for TCS or UST tires and is also compatible with tube type tires when used with tubes CID - Any bicycle dealer or qualified mechanic can service each of the components of a TCS wheel set or rim without the need for special tools or shipping delays 7000 Series - Super light, superior strength; On-Ramp -Provides a consistent fit between rim and tire for easy installation and inflation