Roto Grip UFO Alert Bowling Ball

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  • Roto Grip UFO Alert Bowling Ball and Core
  • Roto Grip UFO Alert Bowling Ball
  • Roto Grip UFO Alert Bowling Ball Core
MSRP: $279.95
— You save $95.00
Frequently bought together:


Roto Grip UFO Alert Bowling Ball

  • Color: Purple Solid / Emerald / Teal
  • Coverstock: e-TraxTM Hybrid Reactive
  • Weight Block:  E.T.™ Core = Equalizer Technology™ (Asymmetrical)
  • Factory Finish: 1500-grit Polished
  • Flare Potential: High
  • Radius of Gyration (RG): 16lbs - 2.52; 15lbs - 2.52; 14lbs - 2.52
  • Differential (Diff): 16lbs - 0.054; 15lbs - 0.054; 14lbs - 0.054
  • Intermediate Differential (Diff): 16lbs - 0.016; 15lbs - 0.016; 14lbs - 0.016
  • Fragrance: N/A

Additional product information:


Assembled for every bowler in this galaxy, the UFOTM 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.TM 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 eTraxTM Hybrid Coverstock which is made of 2 parts pearl and 1 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.

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Additional Information

Lane Condition:
Factory Finish:
Polished 1500 Grit
Core Type:
Hybrid Reactive
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32 Reviews

  • 5
    UFO Alert

    Posted by David O'Sullivan on Oct 14th 2021

    Roto Grip UFO Alert Layout - 55 x 4.5 x 70 If the Hyper Cell Fused and Nuclear Cell had a kid it would be the UFO Alert! This is currently Utah's best high end Asymmetrical bowling ball! I believe it is the most user friendly and matches up to the most styles. It is clean like the Nuclear but stands up in the mid-lane like the Fused! I would say this is the smoothest and roundest ball shape we've seen in a while in this performance category which makes it usable on most any lane condition! Make sure you give this one some consideration!

  • 5

    Posted by Gil Barkman on Oct 14th 2021

    Loving the Alert. The original UFO was a little to much ball for me so i was skeptical about this one but the Alert is a keeper. This Asymmetrical really gets down lane for me and has such a smooth predicable shape form me. 1500 e Trax cover is one of my favorites, This ball really holds its energy for a smooth shape and gets through the pins very well. On a house shot or a tourney bowler this ball is a must have

  • 5
    Roto Grip UFO Alert Ball Review

    Posted by Pete Dohan on Oct 13th 2021

    Ball Specs: Coverstock: eTrax Hybrid Reactive Weight Block: E.T. Core RG: 2.52 Diff: .054 Mass Bias: .016 Bowler Specs: Speed: 15.5 MPH Rev Rate: 300 PAP: 5 ⅜ over 1 ¼ up Layout: Dual angle 50 X 4 ⅜ X 20 With the original UFO we experimented with a pin down layout for me to use on shorter sport patterns or dryer house shots where I could play more in the track area during the 3 game of league. In the last few weeks I have been working on my game and my PAP has changed so the original pin placement when the ball was drilled was 5 inch pin now with the new PAP its 4 ⅜ iinch pin placement. I have been using this ball during the second shift league. I need a strong core to help with the volume of oil that is in the middle of the lane after the first 5 person mixed league but the Hybrid cover gives me the clean reaction through the heads with a predictable recovery off the dry. This ball did get enough press since it was released at the same time as the Dark Code. This ball will also be used on shorter sport patterns. I have a Reality for the fresh and depending on the lane surface I can switch to this piece to give me more length from the cover but still have the strong core to help in case bowlers are using urethane. Pete Dohan Storm Amateur Staff #StormNation

  • 5
    UFO Alert

    Posted by William Tefft on Oct 5th 2021

    Ball Specs: Roto Grip UFO Alert 1500 e-Trax™ Hybrid Reactive Weight Block: E.T. Core™ (Asymmetrical) Color: Purple Solid/Emerald/Teal Review: First off the color of this ball is going to catch your eye right from the beginning. If the color doesn’t get your head to turn the ball motion surly will. This ball is great for those people who love to move left and create and area on the lane that will allow them to swing the ball the lanes begin to transition. The UFO Alert offers a great step down from the original UFO making the perfect 1-2 punch. You will be hard pressed to find a more versatile Hybrid right now. Will Tefft Roto Grip Staff Member #SquadRG

  • 5

    Posted by Shaun Ciesielski on Oct 3rd 2021

    The Roto Grip UFO Alert is the perfect compliment to the original UFO. I drilled this one 5.5x4x2. It gives me more length and a later backend reaction from its Hybrid pearl coverstock. Reads the midlane well but does not pick up early at all. This HP4 line ball is an asymmetric but isn’t super snappy or overly strong like others such as the Nuclear cell. This was the same I felt with my UFO Solid, strong enough yet predictable and controllable. The UFO Alert just goes longer with the same smooth backend roll with the 5x4x2 drilling I have on it. It skids nicely through the fronts when there is oil like on fresh and delivers a smooth yet strong backend motion. Hitting Power is great like every Roto Grip Ball I’ve thrown. I found the best area on the lane was around 3rd arrow. Came off the spot smooth and not so snappy. Getting in deeper I saw the same, but it scores best straighter. My PAP is 5-1/8 and 1/8 up. Usually around 15-16mph, I’d probably be classified between a tweener and a cranker.

  • 5
    Roto Grip UFO Alert

    Posted by Michael LeViner on Sep 28th 2021

    Layout: 55 x 4 5/8 x 35 The UFO Alert has the biggest backend of any high end ball in recent memory. I loved the UFO, though that ball was very smooth and even. The Alert is the opposite! The strong asymmetric core does provide some mid lane traction, but it really unleashes itself in the back part of the lane. That lends itself to tremendous hitting power when it is used on the correct lane conditions. To that end – the Alert should not be used on long, fresh lane conditions. It will be too erratic. Once the lanes break down just a bit and circling the lane becomes crucial, the Alert will be right at home. This ball looks especially amazing as well – the dark sparkly green and deep purple are very attractive.

  • 5
    UFO Alert

    Posted by Stanley Waite on Sep 21st 2021

    UFO Alert - Ball Specs Cover Stock: eTrax Hybrid Reactive Finish: 1500 Grit Polished Core: Equalizer Technology Core Color: Purple Solid/Emerald/Teal RG: 2.52 Differential: 0.054 Intermediate Diff: 0.016 Review The Roto Grip high performance UFO Alert has the space aged Equalizer Technology Core and eTrax Hybrid Reactive cover stock. The UFO Alert stands up very well in the midlane with a strong arching playable backend motion. I tested this ball on a 44 feet typical house pattern with no issues playing right of the track area and left of 25. As a low to medium rev player this ball will be great on house patterns and medium oil tournament patterns. This is a great ball for all levels of bowlers. Order one from your local pro shop today! My ball review videos are posted on YouTube channel Stanley Waite. Stanley Waite 900 Global Staff Member Dover, DE

  • 5
    Rpto Grip UFP Alert

    Posted by Bob Casciaro on Sep 20th 2021

    Just what I needed, goes longer and hits hard, again Chris knocks it out of the park with his recommendation!

  • 5
    UFO Alert Review by Kyle & Joel Johnson

    Posted by Kyle & Joel Johnson on Sep 17th 2021

    Ball Specs: Roto Grip UFO Alert 1500 e-Trax™ Hybrid Reactive Weight Block: E.T. Core™ (Asymmetrical) Color: Purple Solid/Emerald/Teal Review: The UFO line contains a very underrated core in our opinion. The continuous motion that is created is incredible. This line favors those with higher ball speeds or lower rev rates looking for something that is going to keep energy down lane and really pack a punch. If you are seeing heavier volumes or love to move left and create some area then this ball will also suit you perfectly. This ball is pretty comparable to the Storm Phase 3 as a first out of bag and will also serve as a perfect step down to the UFO or Gravity Evolve. P.S. if you have not seen a picture of this core please do so ASAP it is an eye catcher and the technology behind it is remarkable! Kyle & Joel Johnson Roto Grip Pro Shop Staff Members #SquadRG

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