X

From 900 Global:

The Tour Preferred line has quickly established itself as the premier choice of tournament bowlers. Predictability and control are always at a premium on tournament conditions. The X perfectly achieves both of these attributes. The low RG/ Low Differential Pod symmetric core provides early revving action to smooth out the motion at the breakpoint, while the S57 shell and NEAT “A” finish provide the ideal amount of traction to combat all medium lane conditions.