Luke Rosdahl Rated Rumble: Roto Grip RST X-2 vs Roto Grip UFO Alert Bowling Ball

The Roto Grip rst x-2 compared to the roto grip ufo alert bowling ball

My Rated series was designed to give you the ability to compare any ball vs any other ball, but I still receive a lot of questions about specific comparisons, so rather than making you dig around in the playlist, I’ve decided to combine several of the most popular or requested comparisons into single videos! If you have a comparison you want to see, put it in the comments and I’ll make it happen!

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

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

Roto Grip UFO Alert Bowling Ball Ratings For Hook, Length and Backend

The UFO Alert features the asymmetric ET or Equalizer Technology core wrapped in the clean and responsive eTrax hybrid coverstock.  ET comes in at a 2.52 RG, .054 differential, and .016 split or intermediate differential in 15 pounds, and is quite dynamic.  With a little higher RG than is quote unquote typical for asyms, a big differential, and a medium intermediate differential, it wants to get down the lane a bit further than typical asyms and help deliver a big move on the backend.  The eTrax hybrid cover helps to further that intent by breezing through the fronts and responding quickly to friction.  The overall package is strong enough to handle medium to heavy volumes, it’s a little stronger than I expected on paper, but that puts it in prime territory to be a ball down from something like and RST X-1 or Incite, or be the first ball out of the bag for league, and is something you can chase the shot in with all night if you have a higher rev rate, or if you’re lower rev rate, it’s something that can help you keep your angles more closed and still look like you have more revs than you actually do.  I rate the UFO Alert an 8 on hook, a 6 on length, and an 8 on backend strength.  It’s closest to the Zen on hook, the Parallax on length, and the Idol Synergy on 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

roto grip ufo alert bowling ball

Our obsession with helping players of all ages and styles conquer various lane conditions while abiding to forthcoming governing rules, led to the development and creation of the asymmetrical E.T.™ Core (Equalizer Technology Core) which features built in cavities in order to increase weight displacement after drilling without a balance hole to increase overall ball motion.

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.

Assembled for every bowler in the universe, the UFO™ Alert is here to help you navigate those Medium to Medium/Heavy Oil Conditions with ease. No matter your style, no matter your rev rate, no matter your speed, the E.T.™ Core (Equalizer Technology Core) with its built in cavities, is sure to create great overall core motion every time due to the added mass displacement when drilled. And we can’t forget about the eTrax™ Hybrid Coverstock which is made of 2 parts pearl and1 part solid. This cover combination aids in creating plenty of responsiveness to friction down lane without being too angular. Thus, making this combination of core and cover one of the most ideal options ever created for most any house type oil condition on planet earth.

COVERSTOCK:e-Trax™ Hybrid Reactive
CORE: E.T.™ Core
COLOR: Purple Solid/Emerald/Teal
FINISH: 1500-grit Polished
CONDITION: Medium Oil – Medium/Heavy Oil
RG (15lb): 2.52
Diff (15lb): .054

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