The G6-14 rims have steel stems. That is the part you can see. Look closely at where they go into the rim and you will note that there is a rubber seal on both sides of the hole that goes into the rim.Those seals were cracked and dry rotted. We have them display at the Fall rally.
Link
http://www.jegs.com/i/Detroit+Wheels...FdOj4Aod5CwAZw