I PUT A PRODUCT CALLED TIREFLYS ON THE VALVE STEM OF MY 1999 HARLEY DAVIDSON ELECTRA GLIDE CLASSIC. THESE CADGETS GIVE OFF LIGHT AS THE WHEEL SPINS. AFTER 15 MINUTES OF RIDING ON I 75 I DEVELOPED TWO FLAT TIRES AT THE SAME TIME. IT SEEMS THAT THE TIREFLYS REMOVE THE STEM FROM THE TIRE. I CRASHED MY BIKE ON THE LEFT SIDE OF THE INTERSTATE- LUCKILY I WAS ABLE TO HOLD THE BIKE UP UNTIL IT WAS ONLY GOING ABOUT 5 TO 10 MPH. THE BIKE SUSTAINED $7500.00 IN DAMAGE. I WAS OK, LUCKILY I WAS ABLE TO PLANT THE ACCIDENT ENOUGH TO MINIMIZE THE DAMAGE TO ME. I CANT BELIEVE THAT A $20.00 PRODUCT CAN WREAK SO MUCH HAVOC! ROSSITER'S HARLEY DAVIDSON DEALER IN SARASOTA STOPPED SELLING THEM MORE THAN A YEAR AGO. THEY TOO HAD PROBLEMS WITH THEM AS CUSTOMERS APPEARED WITH FLAT TIRES SOON AFTER HAVING THEM PLACED ON THE BIKE. *NLM