What's The Difference Between a Jump Rope and a Speed Rope? - Rx Smart Gear
Amazon.com : Elite SRS Surge 3.0 Professional Speed Rope for Double Unders - Patented Dual Bearing Ultra Light-Weight Handle for Premium Spin Control and Kink-Resistant Cable for the Ultimate Speed Jump Rope :
Pure2Improve SpeedRope
C4 Speed Rope | Cellucor
Speed rope | Increase speed | Jump Rope | Power Systems