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(from the Seller’s Private Collection) The Silver Bullet 2 (SB-2 for short) was released by Tom Kuhn in 1990. The yo-yo featured the first modern ball bearing axle and a patented string gap adjustment mechanism. By unscrewing the yo-yo halves and adjusting the depth of the bearing cups which screw into the halves, the user can set the width of the yo-yo gap to facilitate play action. Clocked at over 14,300 revolutions per minute (RPM), or a rim speed of 100 miles per hour (mph), the SB-2 was an eye popper! On July 31st, 1992, an SB-2 yo-yo took a ride into space on NASA’s Atlantis space sh... |
