That's a pretty light gear. Most beginner bikes will come with a 48*15 for their stock gear, which is sort of where most beginners end up starting to race. You can check out this page that does gear/speed/cadence calculations.
BikeCalc.com - Speed at all Cadences for any Gear and Wheel
Here;s a chart with 47-51 chainrings and 13-17 cogs
