WTB HTZ i35 Rim - 29" TCS Tubeless Disc Black 32HWTB HTZ i35 Rim 29" TCS Tubeless Disc Black 32H. E bikes add to the riding experience by simply providing more for less. More distance more laps more climbs and more descents. With all those mores also comes more weight continually bashing on the components of an e bike. In order to overcome the increased forces induced by the technological progression of modern e bikes WTB designed the HTZ rims with more material in every area of the rim profile.