It's a breakaway locking collar, he just needs to keep tightening it down until the collar breaks and locks in. It's in the instructions in the box that the valve stems come in, and a common design.my goodyear guy tried to install the black valve stems i bought from apex with my new sm-10s and the nut bottomed out on the threads prior to contacting the rim face. Any feed back on this problem? he put the rubber washer in that was in the baggie but not even close to sealing. thanks
Thanks! It was great to meet you as well, next time I'll put on a better showing - it was nice to bounce back from that event that had me DFL by finding a regional class win in the next race.