Nitto StemsWe sell only Nitto quill stems. They are the best stems out there, and work great with our bikes. We don't sell threadless stems, but can order them for your Roadeo or custom.
Can decide which one? Here's a comparison.
Quill Stems versus Clamp-ons
Quills are better. They allow you much easier, faster vertical adjustments than do clamp-ons, and vertical adjustability (raising the dang handlebar) is a huge, HUGE, deal in comfort. Clamp-ons are part of the threadless headset system that now dominates the bike world in First-world countries, but the benefits are mainly for the manufacturers, not for the riders. Once you know your bar position, and IF you can get it there with a threadless/clamp-on rig, then they’re fine. But it is really hard to get them there, given that most bikes are sized small and come with carbon steer tubes that are necessarily too short to slide the stem up more an about an inch and three quarters. That’s not enough.