You need three, maybe four things from your race stem. The length and rise need to hit your criteria, then you want your stem to be strong and light. Lastly, you gotta look at this thing, so a nice design is always welcomed on any part of your bike. 

The Avian Scorcher Top Load hits the mark with its minimal design and light weight ethos. Available from 45mm to 60mm, in 5mm increments, there's an Avian stem here for you. 

Specs:

• Rise - 22mm
• Weights - 45mm/257g, 50mm/268g, 55mm/279g, 60mm/292g
• Clamp Size - 22.2mm
• Steerer Size - 1-1/8 Inch