Originally Posted by
mikey84
No, I don't want to drill because the frame is titanium. and just in case i want to go fixed full time in the future.
I'm getting a new back wheel because the hub my friend had been using is only 125mm wide and the frame's hub spacing is 135mm.
Your picture doesn't show whether your frame will accept brakes or not. It doesn't have cable guides (not a big deal), but I can't see whether or not it is drilled for brakes. It almost looks like there's a hole in your fork, but I can't tell for sure.
You can run brakes on a fixed gear. Or you can take them off if you want. Putting brakes on a bike doesn't jeopardize its ability to become fixed gear.
You can re-space your current hub out to 135mm to avoid getting a new wheel, unless your axle is too short. In that case you'd have to get a new axle.