I'm building a fixie. Right now I ride a SS 29er mountain bike geared 33-16. The smaller chain ring on my old road bike's crankset has 39 teeth, so I'm wondering what size sprocket I should run to get a little more power than that.

I'm not sure on the crank size, they seem similar. I'll be running 700c on my fixie. I'm not too concerned with the force it'll take to pedal, my legs will acclimate themselves to that, I just want the same top speed or a little more even.

I've tried looking at gear conversion calculators and searching, but I've had no luck.

Thank you.