O K talking about a Presta valve on a 700X23 innertube,,,,,,this is the way it went ,,I was changing the innertube took the bad one out,,got the new one inserted the valve into valvestem hole grabed it from the other side and pulled it out firmly! I worked the innertube back into the tire and rim got it all back in no problem ! no pinching notin! so I grab the pump and go to put it on the stem , I notice that the little lock that you turn when finished pumping was'nt there that was odd cuss I thought I saw it when I started anyway I pump up the tire to about 90 #s take the pump off and sure enough the little thing I'm talking about was'nt there??so now I notice someting rolling around inside the rim? I took everything apart again checked inside tire and rim! really good nottin! so I took another innertube and installed that one, no problem except the noise is still inside the rim when I shake or roll it around??? now this is where the good question comes in ,,,,,Is it posible that the little stem lock fallen into the rim somehow like when i inserted the innertube into the rim ???? is there space in there? cuss it's not in the tire ! now after I put the wheel back on the bike and roll the wheel you can hear something rolling around in there**********?I realize it's no big thing but you can hear it!!!and that irritates me I know I'll never be able to get it out ?thats it , anybody ever hear of such a thing?