Daybreak flywheels were developed by Kuryaka for high FPS on a low-budget build. They'll work with printed cages and don't require extremely high-torque motors, squeezing out more efficiency from your builds.Superstock (~150 FPS)? Meishel 2.0s. 41mm cage. ~150 FPS average with Accufakes.Ultrastock (~200 FPS)? Run Fang Revampeds or torquier, 40mm cage. ~170 FPS with Accufakes.=====The technical:Root diameter: 31.5 mmOuter Diameter: 38 mmWeight: 7.1gMaterial: Machined POMThe mild-crush, high concavity wheel design should be treated differently than other flywheels - the root diameter of 31.5 (vs. 33 on stock wheels and 34-35 on most aftermarket wheels) means that a smaller cage size is necessary.A 41mm cage gives you a 9.5mm gap. lets you fire hard-tip darts without jamming or deforming the heads, while outperforming standard flywheels on much more unforgiving gaps. SOLD AS A PAIR.