RST X-4


 
Roto Grip RST X-4
Roto Grip
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Release Date
Overseas/International Release

Translated from Japanese:

Roto Grip products are popular with seniors and women due to their good control performance.

This product has a medium oil strength setting, and the high inertia "RST™ Core" makes it a ball with a strong backend. In front of the lane, the straight-line force is maintained, and the axis moves with a strong roll from the middle. The hooking point is also a ball that can be seen well.

It shows a sharp bend, but it can be pitched without being violent, and it inherits the ease of handling of lotto products.

In addition, the pitching line is easy to see, and the ball is finished in a way that is easy to respond to changes in conditions.

Factory Finish
1500 Polished
MicroTrax Pearl Coverstock
Type
Pearl Reactive

Bottom line, this coverstock technology just flat out crushes in terms of performance. Featuring a 100% nanoparticle load, this pearlized concoction provides midlane traction and response to friction while maintaining its surface profile over a longer period of time to ensure you get maximum performance each and every time. And just like the solid version, the pearl version displaces oil at the highest rate of any of our pearl covers. Basically, think of it as added forgiveness on those not-so-great shots off your hand.

Roto Star Tour (RST) Core
Roto Grip Roto Star Tour (RST) Core

Professional bowlers like to see continuous motion down lane with minimal deflection as the ball enters the pocket due to their rev rates usually being on the higher side. This logic was the basis of development by the R&D team as they looked to create a core that would maintain dynamics after drilling in order to maintain a higher level of core torque down lane. The larger mass at the base of the core does indeed create that. Especially since when drilled, the thumbhole will always end up near the bottom of the void area not to affect the bottom mass of the core all that much. Thus, making this core a “Tour Level” type core design.

Core Type
Asymmetric
16 pounds
RG
2.520
Diff
0.049
MB Diff
0.015
15 pounds
RG
2.530
Diff
0.053
MB Diff
0.016
14 pounds
RG
2.550
Diff
0.053
MB Diff
0.016
13 pounds
RG
2.570
Diff
0.032
MB Diff
0.010
12 pounds
RG
2.590
Diff
0.029
MB Diff
0.008
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