I just got my new bike today, and the rims I got with it are Mavic A119 which have a hole that is compatible for a presta valve, and I was just wondering if it is possible to switch the tube i have which are presta to a tube with schrader valves?
there is a tiny plastic ring in the hole where the valve stem goes, and was wondering if this thing will pop out of the rim or is built into the rim? and if it does pop out will there be enough room to fit a schrader valve stem into it? thank you. =)
Here is a picture to explain what I'm talking about :