Bridgestone Tour B RX Golf Balls offer higher Ball Speed For Maximum Distance. Bridgestone have reinvented the Tour B RX to feature new REACTIV iQ cover technology. Until now you had to choose more distance or more spin. With REACTIV iQ you can now get more distance and more spin out of the same golf ball. Designed to fit golfers with swing speeds under 105mph, the new Tour B RX has higher ball speed for maximum distance while having 'hit and sit' performance on approach shots.