I built a sb150 rencently and used a 40mm stem. However, after riding in the park for several times I found it is a little nervous to maintain pressure on the front wheel especially while riding steep and sharp berms. All the builds from yeti come with 50mm stems, so I guess the bike may be more compatible with a 50mm stem. Does anybody have any ideas about it?
P.S. I'm 5'10 and ride a size M, the overall geometry seems perfect to me.
P.S. I'm 5'10 and ride a size M, the overall geometry seems perfect to me.