
Translated from Japanese:
The Gem series is born wearing the first running cover stock "eTrax Plus Pearl Reactive" for the first time in a long time. Rolling and running, stable trajectory and controllability, large arc-shaped bends, all types of players can use the best performance ball "VINTAGE GEM" no matter which line they use.
There will be slight release deviations in any class of bowlers, but this "Defiant LRG Core" will compensate for them and lead to high scores.
Moreover, this work does not dare to adopt A.I. technology to make it sharp with a running cover stock for the first time in a long time, and it is super easy to handle. The heavyweight pin action is also an attractive ball.
eTrax Plus Pearl Coverstock
Cleaner through the front of the lane – CHECK! Provides traction throughout the mid-lane – CHECK! The most responsive eTrax coverstock down lane we have ever created – CHECK! The eTrax PLUS coverstock material is the most advanced version of the eTrax chemistry we have ever concocted. After countless hours of testing on the lanes paired with mixing, re-mixing and adjusting in the R&D Lab, we found a way to enhance the overall performance of this material by changing ratios both up and down in the chemistry in order to create this overall “stronger” version. Thus, making this cover more aggressive and responsive than the original eTrax covers, but not as early and smooth as the MicroTrax™ covers.
Engineered for Medium/Heavy to Heavy Oil Conditions
Defiant LRG Core

Sometimes evolution can spark new life into technology from yesteryear. Such is the case with our latest introduction to the HP4 Line of balls. With recent more in-depth studies of flare migration and core tendencies we circled the wagons back to the Defiant Series of bowling balls which featured a core ahead of its time regarding flare migration in order to create a longer constant motion. Upon further review and testing, we found that by altering the composite of this core shape, we were able to create the fastest revving, strongest continuing, lowest RG asymmetrical core we have ever offered in the history of ever now known as the DEFIANT™ LRG CORE.
Originally introduced in the GEM, the Defiant LRG Core has brought style, pizzaz and honor scores to bowlers of every skill set around the globe. Thanks largely in part to the density composition of this core, it sets the standard as the fastest revving, strongest continuing, lowest RG asymmetrical core across our lines. So, if strong and continuous is what you are in the market for, then look no further than this part right here. No matter your style or your number of revs on the ball, this core will get into a roll and keep rolling every single time.