Roto Grip Transformer Bowling Ball
$289.95 Original price was: $289.95.$179.95Current price is: $179.95.
SKU: BBMRLL
Categories: Asymmetrical Core Bowling Balls, Bowling Balls, Bowling Brand, High Performance Bowling Balls, MRP/MAP, Pre-Orders / New Releases, Roto Grip, Roto Grip Bowling Balls, Top Selling Bowling Items
Tags: .015 MB, .051 Diff, 2.51 RG, Asymmetric, Reactive
Brand: Roto Grip
What should I know about the Transformer?
Drill-tunable Morph-Wing asymmetric core that transforms when drilled
Nano-free V-R1 Solid Reactive cover at a 4000-grit finish
Strong, controllable hook for medium to medium-heavy oil
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Description
The Most Tunable Asymmetric Solid in the Game
About the Transformer
The Roto Grip Transformer is built around one idea: tunability. It pairs the drill-tunable Morph-Wing asymmetric core with the nano-free V-R1 Solid Reactive coverstock to give serious bowlers and pro shops the most adjustable ball motion in the lineup. The Transformer does not just react to the lane, it can be drilled to transform into the exact shape your game needs.
That adaptability comes from the Morph-Wing core. Unlike a traditional asymmetric, displacing mass in the wing section during drilling fundamentally changes the core numbers, unlocking a completely new flare pattern and ball motion. Wrapped in the balanced, dependable traction of the V-R1 Solid cover at a 4000-grit finish, the Transformer reads medium to medium-heavy oil with strong, controllable hook. Stop adapting to the lanes and make the lanes adapt to you.
Understanding the Roto Grip Morph-Wing Core and Roto Grip V-R1 Solid Reactive
Roto Grip built the Transformer to be the most tunable asymmetric in the lineup. Specifically, the Morph-Wing core is engineered to change drastically when drilled: removing mass from the wing alters the core numbers, so your pro shop can reshape the flare and motion to fill almost any slot in your bag. The nano-free V-R1 Solid Reactive cover, finished at 4000 grit, delivers the most balanced traction-to-reaction ratio of Roto Grip’s nano-free materials, for strong but controllable hook through medium-heavy oil. The full per-weight specifications are listed below.
A Drill-Tunable Asymmetric Core That Transforms When Drilled
At the heart of the Transformer is the asymmetric Morph-Wing core. At 15 lb it measures RG 2.51, a strong .051 differential, and a .015 intermediate differential (mass bias), numbers that produce strong, defined asymmetric motion. What sets it apart is the wing geometry: unlike a traditional asymmetric, displacing mass in the wing section during drilling fundamentally changes the core numbers, unlocking a completely new flare pattern and ball motion.
That is the whole point of the Transformer. The same core can be laid out for an earlier, smoother roll or a later, more angular shape depending on how the wings are drilled, so one ball can be tuned to fill more than one slot in your arsenal. It is one of the most adaptable asymmetric cores Roto Grip has built, and it rewards working with a good pro shop to dial in the exact reaction you want.
A Nano-Free Solid With the Most Balanced Traction-to-Reaction Ratio
The Transformer wraps that tunable core in the V-R1 Solid Reactive coverstock, finished at 4000 grit. The V-R1 (Versatile Response) solid is a nano-free formulation that Roto Grip built to deliver the most balanced and dependable traction-to-reaction ratio of any of its nano-free materials. It grabs the mid-lane for an early, controllable read, then responds smoothly to friction down-lane rather than jumping.
That balance is what makes the Transformer so versatile. The solid cover gives you the traction to handle medium to medium-heavy oil, while the 4000-grit finish keeps the read controllable and continuous. Take the surface down at your pro shop for an even earlier, stronger response when the oil increases, or polish it up for more length when the lanes dry out.
Transformer Specs
| Weight | Radius of Gyration (RG) | Differential | Mass Bias |
|---|---|---|---|
| 16 lbs | 2.50 | .050 | .015 |
| 15 lbs | 2.51 | .051 | .015 |
| 14 lbs | 2.53 | .053 | .013 |
| 13 lbs | 2.57 | .032 | .010 |
| 12 lbs | 2.59 | .029 | .008 |
RG and differential vary by weight. Specifications provided by the manufacturer.
Who This Ball Is Right For
✓Tournament Players: A strong, tunable asymmetric solid your pro shop can lay out to fit changing conditions
✓Higher-Rev Bowlers: The Morph-Wing core rewards revs with strong, controllable flare and a continuous, balanced motion
✓Arsenal Builders: The drill-tunable core lets you customize the reaction to fill a specific gap, an earlier benchmark or a later, more angular look
✓Pro Shop Customers: Built for bowlers who work with a driller to dial in an exact ball motion rather than buying off the rack
Good to Know Before You Buy
·Strong, aggressive motion: This is a high-flare piece built for traction. If you want a controlled, lower-hook reaction, a lower-differential ball will suit you better.
·Ships at a clean box finish: The 4000 Grit finish is a smooth, sanded surface that still gets down the lane. Take it lower for an earlier read on heavier oil, or polish it up for more length.
·Asymmetric layout sensitivity: Layout choices shift the reaction more than on a symmetric ball. Match the pin and mass bias to your game with your pro shop.
·Sold undrilled: Ships without finger holes, so it can be fitted to your hand and span.
BowlersMart Tips: Where the Transformer Fits in Your Roto Grip Arsenal
Where It Fits in Your Arsenal
In the Roto Grip lineup, the Transformer is your strong, tunable benchmark solid for medium to medium-heavy oil. It attacks fresher, heavier volume than a pearl with an early, controllable read, and because the Morph-Wing core is so adjustable, your driller can lay it out to sit higher or lower in the bag. It pairs naturally below your strongest, most aggressive solid and above a cleaner pearl like the Transform Pearl, the controllable workhorse you tune to your exact need.
Surface Adjustments
The 4000-grit finish is a controllable box surface. Take it down with a lower-grit pad for an earlier, stronger read on heavier oil, or polish it up for more length when the lanes dry out. Have surface changes done at your pro shop for an even, consistent finish.
Coverstock Care
Wipe the V-R1 Solid cover with an approved reactive ball cleaner after every session, and deep clean it periodically. Keeping a solid cover fresh preserves the balanced mid-lane traction that makes the Transformer so dependable.
Earn points on every Roto Grip purchase through the Striking Rewards loyalty program. Every ball you add to your arsenal builds toward your next reward.
Shop With Confidence at BowlersMart
The Roto Grip Transformer Bowling Ball ships free with no minimum purchase and is backed by our 60-day return policy. As an authorized Roto Grip dealer, every ball is genuine and covered by the full one-year Roto Grip warranty. Place your order before 2 PM EST and it ships the same day.
Additional information
| Weight | 15 lbs |
|---|---|
| Dimensions | 9 × 9 × 9 in |
| Brand | |
| Bowling Ball Core Shape | |
| Bowling Ball Core Name | |
| Bowling Ball Coverstock Type | |
| Bowling Ball Cover Name | |
| Radius of Gyration: RG (15LB) | |
| Differential: Diff (15LB) | |
| Flare Potential | |
| Mass Bias Strength | |
| Ball Performance Level | |
| Surface Finish | |
| Ball Weight | |
| Preferred Lane Conditions | |
| Bowling Ball Color | |
| Release Date |
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Everyday Free Shipping

Place your order before 2PM EST Monday - Friday (excluding holidays) and your order will ship out same day for in stock and available products. In stock items will ship out the following weekday if purchased after 2PM EST.
In stock Items may take 3-5 business days to arrive depending on your location. (2-10 days in AK, HI, PR, GU, APO, FPO).
We use USPS Priority Mail, Parcel Post, UPS and FedEx as our methods of shipping. Ground Shipping is ALWAYS free in the USA (except Alaska, Hawaii, Puerto Rico, Guam, and APO / FPO addresses), no matter how many items you order, no matter the weight, no matter the distance!
International Shipping - Duties, & Taxes & Return Information
Duties & Taxes - If shipping international, duties and taxes will need to be paid locally. BowlersMart.com is not responsible for any local duties or tax fees.Returns - We gladly ship worldwide, but please note that international customers are responsible for all return shipping and handling costs. If you wish to return your order, you must cover all shipping fees, duties, and any additional charges incurred. We recommend using a trackable shipping method to ensure your return reaches us safely. For more details, please review our full return policy or contact our customer support team.
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WARNING:
This product can expose you to chemicals including Lead, Phthalates, and/or other chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.









