RotoGrip UFO on an over used league condition  | Fresh condition review coming soon

Roto Grip UFO Review

While no longer in production, the Roto Grip UFO remains a formidable heavy oil weapon on the used market for bowlers who need maximum hook potential and aren't afraid of an aggressive ball reaction.

By BowlingBallVideos.com Staff Reviewed Apr 22, 2026 8 videos analyzed
6.7
Overall
Good Score
Weight
12-16 lbs
Coverstock
Solid
Core
Asymmetric
Hook
High

Performance Analysis

Performance Analysis

Testing revealed the Roto Grip UFO to be a dependable heavy-oil choice with a notably smooth, early-reading motion. Independent reviewers observed the ball on an exceptionally worn league pattern with significant oil carrydown and track wear from extended holiday bowler traffic—conditions far more challenging than typical fresh oil. Despite the degraded lane surface, the ball demonstrated commendable consistency. The reactive solid coverstock produced immediate hook off the friction areas while resisting over-reaction; the ball read the lane predictably whether thrown from straighter angles or aggressive positions, allowing the bowler to make precise hand adjustments rather than chase wild ball motion.

What stood out during testing was the UFO’s ability to maintain pin action even when thrown into heavy volume zones. The asymmetric core generated strong backend reaction without losing control through the front and midlane phases, which is critical on heavily oiled patterns where many balls either skid too long or overreact prematurely. The reviewer’s shot repeating improved noticeably once the appropriate launch angle was identified—a sign of a forgiving, predictable ball reaction. On the worn pattern, success required positioning the ball into the drier edge areas rather than the heavily trafficked middle, but the ball responded consistently to these adjustments.

One notable finding: the UFO’s aggressive reading motion meant that in the oil-laden midlane areas typical of this worn condition, the ball required disciplined hand control to prevent early hook that would eliminate backend energy. This is not a weakness but rather a characteristic that rewards technique and consistency. Testers remained eager to evaluate the ball on a fresh pattern to observe how the same motion profile would perform without the pronounced carrydown interference.

Who Is This Ball For?

The Roto Grip UFO is well-suited for bowlers who play heavy-oil sport or league conditions and value a strong, early-reading motion that responds to hand adjustments. This ball will appeal to strokers and tweeners with moderate to high rev rates who can manage the aggressive coverstock through proper hand position and release. Bowlers who struggle with balls that skid too long in volume will find the UFO’s immediate reading action beneficial; those preferring mid-lane length should look elsewhere.

This is also an excellent choice for bowlers seeking a benchmark heavy-oil piece that delivers predictable reaction even under compromised lane conditions. The UFO rewards shot discipline and consistency rather than forgiving loose technique, making it ideal for competitive bowlers willing to adapt their approach rather than expect the ball to do the work. It excels when the bowler can commit to a line and trust repeatable adjustments, and it will not perform optimally for players who alternate between aggressive and passive launching styles.

Hook Potential
8.0
Length Through Heads
6.0
Back-End Continuity
7.0
Pin Action
7.0
Versatility
6.0
Value for Money
7.0

The Pros

  • • Strong hook potential with E.T. asymmetric core
  • • MicroTrax-S20 solid coverstock excels in heavy oil
  • • High flare potential creates excellent pin carry

The Cons

  • • Limited versatility outside heavy oil conditions
  • • 2000 grit finish may be too aggressive for some lane surfaces

Who Is This Ball For?

While no longer in production, the Roto Grip UFO remains a formidable heavy oil weapon on the used market for bowlers who need maximum hook potential and aren't afraid of an aggressive ball reaction.

Heavy oil tournament bowlersPower players seeking maximum hookBowlers facing challenging oil patterns

Technical Specifications

Core Details (Roto Grip E.T. Core Core)
RG (15 lbs) 2.52
Differential 0.054
Int. Differential 0.016
Coverstock Roto Grip MicroTrax-S20 Solid Reactive
Core Type Asymmetric
Factory Finish 2000 Grit
Color Black / Blue / Green

How It Compares

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Real Experience Bowling
Roto Grip UFO (2 testers - house shot) by TamerBowling.com
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Roto Grip UFO (2 testers - house shot) by TamerBowling.com

TamerBowling
Roto Grip UFO | Nick Brown
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Roto Grip UFO | Nick Brown

Nick Brown

Frequently Asked Questions

What oil condition is the Roto Grip UFO best for?
The Roto Grip UFO is designed for heavy oil conditions. It features a reactive solid coverstock with a 2000 Grit finish, which gives it the surface traction needed to grip through heavier oil patterns.
Is the Roto Grip UFO good for beginners?
The Roto Grip UFO is a high-performance ball with high hook potential, which may be difficult for beginners to control. It's better suited for intermediate to advanced bowlers who have developed a consistent release. Beginners should consider an entry-level ball like the Brunswick Rhino or Roto Grip Hustle series first.
What is the RG and differential of the Roto Grip UFO?
The Roto Grip UFO has an RG of 2.52 and a differential of 0.054, with an intermediate differential of 0.016. The higher RG means it stores energy longer, pushing further down the lane before transitioning. The high differential creates strong flare potential and aggressive ball motion.
How much does the Roto Grip UFO cost?
The Roto Grip UFO is priced at varies by retailer. This is a competitive price point for a ball in its performance category. You can find it at BowlersMart.com with free shipping and 60-day returns.
What type of bowler should use the Roto Grip UFO?
The Roto Grip UFO is best suited for bowlers who want maximum flare potential and angular ball motion. With its reactive solid coverstock on heavy conditions, it works well for medium to high rev rate players who need a ball that can handle oil and still make a strong move on the backend.

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