Power Up Roto Grip RST X-2 Bowling Ball Video Review by Luke Rosdahl | 2 Testers (4K)

The Roto grip rst x-2 bowling ball is their newest high performance big core asym

The Perfect Compliment To The Roto Grip RST X-1

The RST X-2 features the newly adjusted etrax plus pearl coverstock and rst or roto star tour asymmetric core. 

The RST X-2 Layouts For Drilling

Angel’s layout is the same as always, 5 x 3 ½ x 3 ½, that puts the pin above the bridge and kicks the psa out a couple inches, my layout is 4 ¾ x 3 ½ x 3 ½, which puts the pin in my ring finger and kicks the psa out a bit further. 

The Roto Grip RST X-2 Coverstock & Core Combo

eTrax plus pearl is a bit earlier and slower than the base etrax cover on the Rubicon UC2, but still offers a lot of length up front and boom down lane.  The asymmetric rst core is medium strength for an asym, not quite a mild asym like the Tensor core in the Incite or the Rondure core in the Rubicon’s, but not as strong as something like the RAD4 core in the Code series or the Atomic core in the PhysiX series.  It comes in at a 2.53 rg, .053 differential, and an .016 split or intermediate differential in 15 pounds, and it creates a very round and continuous motion on the lanes that has plenty of torque without being too early or aggressive.  The X2 is a great compliment to the X1, as it shapes virtually identically, just being longer and quicker as well as a couple boards weaker. 

Roto Grip RST X-2 Ratings For Hook, Length and Backend

For ratings, I’ve got the RST X2 at an 8 for hook, a 7 for length, and a 9 for backend strength.  This puts it on par with the UFO Alert, but a bit ahead of the UC2 in hook, same length as the UC2 and a bit longer than the Alert, and right between the two in backend strength.  Select the next comparison you’d like to see from the links on the screen or scroll down to the description to find links to other choices.  Thanks for watching and may the strikes be with you. 

roto grip rst x-2 bowling ball

Given the continued success of the RST™ X-1, we knew the next ball in the series using the Roto Star Tour Core was going to need a special coverstock wrapped around it as well. So, after countless tests involving multiple players of different styles, we determined that the eTrax™ pearl material gave us the type of reaction we were looking for, but we wanted something a little more while still using that same chemistry. So, the R&D team went to work changing the ratios and other variables until we settled in on the NEW eTrax™ PLUS Pearl Reactive formula that provides a larger footprint throughout the entire lane without reducing the responsiveness to friction down lane. Creating yet another viable pearlized coverstock option for the Roto Grip family of balls.

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 in the void area not really affect the bottom mass of the core. Thus, making this core a “Tour Level” type core design better known as the Roto Star Tour Core (RST™ Core).

Coverstock Name E-Trax™+
Coverstock Style Pearl
Coverstock Type Reactive
Weight Block RST™ Core = Roto Star Tour™ (Asymmetrical)
Color Tanzanite
Finish 1500 Polished
Finish Method Can be Polished OR Can be Sanded More
Durometer 73-75 on D-Scale
Flare Potential High
Weights 16lbs – 12lbs

RG: 2.53
DIFF: .053

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