I just bought an 18" 1996 Kona Lava Dome which came with a 125mm stem. Its waaaaay too long for me and I would like to put a shorter stem on (100mm), only I'm having trouble finding one. I came across quill to threadless stem adapters and wondered whether or not they are safe for riding off road? If they are it would be useful because it looks like it might take me a while to find a suitable quill stem.