ntroducing the first 20” Street Tubeless rim on the market. The TCS Felon uses the most advanced drilling pattern of any bicycle rim on the market today. Our new 4D drilling process creates the optimal interface between spoke and rim. This exact angle reduces binding and the need for eyelets. The I-Beam is distinctive, centrally located vertical support counteracts spoke loads and provides torsional rigidity. Our new G69 material is super light with superior strength. NO RADIAL LACING. These rims are designed and drilled for 3 cross specifically. Each TCS Felon rim comes with a valve plug for the unused valve hole (TCS Felon rim drilled for both TCS and Schrader).