Joined: Feb 2012
Posts: 19,353
Likes: 5,471
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Obviously the valve only needs to extend beyond the rim's inner surface enough to attach a pump chuck. Any longer is no problem though. As many new bikes are coming with "deeper" rims more and more tubes are being made with longer valve stems. Andy
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AndrewRStewart