![](/medias/GEM_00000.png?fv=AB80DB3FEAA0C07EC7CFEC4AB11ADFA7-140897)
![](/medias/spinme_img.png?fv=35A912FBD6CE9DC1C5AAFF6F15AA9A99-3746)
GEM
Brilliant. Extraordinary. Magnificent. Call it what you will, but we prefer to call this beauty exactly what it is, a GEM™. Not only will its breathtakingly good looks mesmerize your competition, but its overall performance will as well thanks to the inner treasure known as the Defiant™ LRG Core - (the lowest RG asymmetrical core Roto Grip has ever created.) Which means this is by far the fastest revving asymmetrical core we have ever produced. And well, we couldn’t just stop there, so we wrapped this monstrosity of a core with the most aggressive solid coverstock we make known as MicroTrax™ Solid Reactive. Making this ball dazzle on those Heavier Oil Conditions.
Release Date: March 11th, 2022
This kit contains:
- WIP GEM 12 (x 1)
- LABEL SINGLE BALL BOX039070001 (x 1)
- NEW LABEL 4 BALL 03907-0002 (x 0)
- ROTOGRIP WHITE SINGLE BALL (x 1)
- ROTOGRIP WHITE 4 BALL BOX (x 0)
- BAG 15X18X.02 MIL (x 1)
Technical Specifications
![](/medias/techspecs_core_RG_core.png?fv=328074806BDF0EAD345A092A2CA44180-16142)
![](/medias/techspecs_duro_RG_73-75.png?fv=3FDC9BE034FD2C54157FA789460B0C2C-18892)
![](/medias/techspecs_finish_RG_2k_abralon.png?fv=BB549F04648D86B278D4D927C86ACF9D-14302)
![](/medias/techspecs_flare_RG_High.png?fv=E4306801182456EB96E009035CFA20A4-26415)
![](/medias/techspecs_sym_RG_asymmetrical.png?fv=7590FA834EA456F6C6DD45FAF77D19AD-16113)
![](/medias/techspecs_cover_RG_MicroTrax_S.png?fv=E8A6C6E60F7491F33028AE2381B0BFA2-26291)
-
12 lbs.
Radius of Gyration
2.59
Differential
0.029
PSA
0.008
-
13 lbs.
Radius of Gyration
2.57
Differential
0.032
PSA
0.010
-
14 lbs.
Radius of Gyration
2.50
Differential
0.052
PSA
0.015
-
15 lbs.
Radius of Gyration
2.47
Differential
0.053
PSA
0.016
-
16 lbs.
Radius of Gyration
2.47
Differential
0.051
PSA
0.016
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.
Ad Sheet: Gem Ad Sheet PDF
Ball Image: Gem PNG
Shelf Talker/Crazy 8's: Gem Crazy 8 / Shelf Talker
Bowling Display Flip Card: Gem Bowling Display Flip Card
Tech Sheet: Gem Tech Sheet
Resurfacing Guide: Resurfacing Guide PDF
![](/medias/RST_00000.png?fv=2514AFCCDB90F6822D44B6B02B95D095-334444)
![](/medias/spinme_img.png?fv=35A912FBD6CE9DC1C5AAFF6F15AA9A99-3746)
MicroTrax™ Coverstock
The MicroTrax (Micro Nanoparticle Traction) Coverstock offers the optimum balance of midlane traction and responsiveness to friction thanks the blend of nanoparticles throughout the coverstock. This formulation maintains its surface profile texture longer to ensure you get maximum performance while displacing oil at an above average rate compared to other coverstock materials on the market today.
Engineered for Medium/Heavy to Heavy Oil Conditions
![coverstock-graph](/medias/RG_coverstock_MicroTrax.jpg?fv=222C0B727D345522F86D6A40EDFFB918-377534)
Ball Reaction Section
FLARE POTENTIAL
![FLARE](/medias/GEM REACTION FLARE.png?fv=C149EF0E51C6AB20834F5D660829AC2D-5577)
Low
Medium
High
BALL SHAPE
![SHAPE](/medias/GEM REACTION SHAPE.png?fv=3EB04E0ABCB68C1B588AB225A839B4E4-5554)
Smooth
Angular
HOOK LENGTH
![HOOK](/medias/GEM REACTION HOOK.png?fv=872209C59C4C5432042D2FD7CA085E55-4995)
Early
Mid-Lane
Late
OIL VOLUME
![VOLUME](/medias/GEM REACTION VOLUME.png?fv=BE3FBD861EF07F9CDFD582584D37B500-5046)
Light
Medium
Heavy
PATTERN LENGTH
![LENGTH](/medias/GEM REACTION LENGTH.png?fv=F1D35A85CC9E5F4EBC6E5536A6CBB015-4745)
Short
Medium
Long
LANE CONDITION
![CONDITION](/medias/GEM REACTION CONDITION.png?fv=20E8E040FECE3D777BF9767C6BA00816-5036)
Fresh
Transition
Burn