The Stans NoTubes ZTR Alpha Rims make every ride better and faster. Lightweight, durable, tubeless-compatible rims accelerate with an unmatched quickness and feature Bead Socket Technology, which means you corner better and experience less rolling resistance. When used with tubeless road tires and NoTubes Sealant, you enjoy near puncture-proof riding and racing for greater peace of mind. Stans NoTubes ZTR Alpha Rims Features   Can be run with tubes or tubeless. For road and cyclocross Bead Socket Technology (BSTR) for superior tubeless performance Lightweight design for instant acceleration Wide, low-profile rim design for better cornering and faster rolling Compatible with road tubeless-specific clinchers and conventional clinchers when used with tubes