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THE MOST TRANSFORMABLE
BALL ON THE MARKET
INTRODUCING THE ALL-NEW HP5 LINE
The HP5 line represents Roto Grips commitment to pushing the boundaries of bowling ball design. Reserved for our most advanced innovations, the HP5 is dedicated to one thing: REVOLUTIONARY PERFORMANCE.
THE ULTIMATE COMPETITIVE EDGE
BUILT TO TRANSFORM YOUR GAME
Meet the TRANSFORMER. The Transformer doesn't just react - it transforms to meet your exact needs.
INTRODUCING THE
MORPH-WING CORE
The Morph-Wing Core is a dynamic, unique shape that was built to enhance torque induced precession when drilled.
Engineered to change drastically when drilled
Displacing mass in the wing section fundamentally alters core numbers
Unlocks completely new flare potential and ball motion
WHY IS THE MORPH-WING CORE UNIQUE?
TORQUE INDUCED PRECESSION
Torque induced precession pulls the ball in the direction of the center of mass. This can cause a ball to
retain or lose axis rotation faster on the lane.
WHY IS THE MORPH-WING CORE UNIQUE?
TORQUE INDUCED PRECESSION
It all comes down to CONTROLLED WEIGHT SHIFT: when your pro shop operator drills into the “wing” the
internal weight changes dramatically.
WHY IS THE MORPH-WING CORE UNIQUE?
TORQUE INDUCED PRECESSION
This shift greatly transforms the core numbers, giving you a completely different flare pattern and motion
that no other asymmetric shape can match.
TORQUE INDUCED PRECESSION IS
TRUE GYROSCOPIC PRECESSION
Torque induced precession is true gyroscopic precession. It has a huge influence on the rotation of a
bowling ball. This happens because angular momentum chases the torque created by the center of mass.
NO PRECESSION
TORQUE FREE PRECESSION
TORQUE INDUCED PRECESSION
TORQUE INDUCED VS TORQUE FREE
ROTATIONAL INFLUENCE
Torque induced precession pulls the ball in the direction of the center of mass. This can cause a ball to
retain or lose axis rotation faster on the lane.
TORQUE FREE
STABLE AXIS
UNSTABLE AXIS
TORQUE INDUCED
LEFT HAND
RIGHT HAND
PRECESSION SUMMARY
NO PRECESSION
TORQUE FREE PRECESSION
TORQUE INDUCED PRECESSION
BOTH PRECESSION
WINGS ARE THE KEY TO TRANSFORMATION
Dynamic asymmetric design that physically transforms when drilled
Mass displacement in the wing creates unprecedented core number changes
Delivers completely different flare patterns and motion based on drill transformation
Most transformable core shape on the market
PIN DOWN REVOLUTION
“Pin down layouts increase intermediate differential more than traditional designs, giving you a stronger overall motion with control.”
PIN UP LAYOUT
For traditional thumb players, this drilling keeps the thumb hole positioned away from the precession wing.
- Precession Effect: Enhances torque-induced precession, helping the ball retain axis rotation
- Ball Motion: Stronger backend motion with increased entry angle
- Best Use: More open angles as lane conditions begin to transition
PIN DOWN LAYOUT
For traditional thumb players, this drilling places the thumb hole directly through the precession wing.
- Precession Effect: Inhibits torque-induced precession and enhances asymmetry dynamics
- Ball Motion: Earlier, smoother hook with a rounder downlane shape
- Best Use: Straighter angles and fresh oil conditions when control is critical
ULTIMATE LAYOUT CONTROL
The Transformer represents a true breakthrough in bowling ball design. A core that actually transforms when drilled, creating unprecedented layout versatility
2-HANDED BOWLERS
Drilling options offers flexibility in shaping reaction
Hitting the Precession Wing
3½" to 5½" pin-to-COG
Earlier and smoother motion
Missing the Precession Wing
Under 3½" or over 5½" pin-to-COG
Cleaner, more angular motion
TECH SPECS & CORE NUMBERS
RG | DIFF | PSA
16 = 2.50 | .050 | .015
15 = 2.51 | .051 | .015
14 = 2.53 | .053 | .013
13 = 2.57 | .032 | .010
12 = 2.59 | .029 | .008
INTEGRITY FOR PRECISION
DESIGN INTENT
Depending on how you drill it, the Morph-Wing Core is designed to transform ball reaction to match the player and environment.
MOTION CONSEQUENCE
This consistency enhances torque induced precession for every style of bowler — keeping the ball on its intended path with a stable, continuous hook that drives through the pin deck.
PLAYER BENEFIT
Transformation without sacrificing consistency.
COVER STOCK TECHNOLOGY
VERSATILE RESPONSE SOLID ( V-R1)
The Versatile Response Solid (V-R1™) is a proprietary, hyper-reactive solid reactive matrix. Formulated with a specific blend of polymers and chemical additives, the V-R1™ coverstock exhibits a unique Dynamic Surface Friction (DSF) profile. This allows it to generate controlled, predictable traction through the mid-lane and backend on medium to medium/heavy oil volumes, without succumbing to premature burnout or over-reaction at the breakpoint.
Engineered for Medium to Medium/Heavy Oil Conditions
REACTION PROFILE
FLARE POTENTIAL
Low
Medium
High
BALL SHAPE
Smooth
Angular
HOOK LENGTH
Early
Mid-Lane
Late
OIL VOLUME
Light
Medium
Heavy
PATTERN LENGTH
Short
Medium
Long
LANE CONDITION
Fresh
Transition
Burn
FIND A PRO SHOP NEAR YOU
Find a VIP Pro Shop to learn more about layout options
TRANSFORMER DRILLING GUIDE
HOW TO FIND THE WING
- Draw a line from the center of the pin to the PSA
- Measure 4 inches and 5 inches from the pin on this line — this marks the top and bottom of the wing
- At 4 and 5 inches, draw a perpendicular line 1.25 inches on both sides (2.5 inches total width)
- Connect the outer lines to form the Morph-Wing Rectangle
What does drilling into the wing do?
Drilling into the wing increases the intermediate differential, increasing asymmetry in the same way drilling into the PSA would on a traditional design.
This results in a stronger, earlier motion that produces a smoother, more forward roll off the breakpoint.
With this design, players can choose to drill into the wing or into the PSA to control how much torque-induced precession is introduced and fine-tune ball reaction at the end of the pattern.
THINGS TO CONSIDER
Final drilled hole positions for pin-up and pin-down layouts are relative to PAP, span, and pitch.
Adjustments may be required to Pin-to-PAP, PSA-to-PAP, and Pin Buffer distances to ensure holes fall inside or outside the wing as intended.
WARRANTY REMINDER
Do not sacrifice the structural integrity of the ball just to contact the wing.
This includes drilling halfway into the pin, using unsupported layouts, or other non-recommended practices.
For full warranty details, visit stormbowling.com/spi-support
VLS LAYOUTS
Longer Pin Buffer — Hit Wing
Best for speed-dominant players with shallower launch angles. Hitting the wing increases dynamics and inhibits torque-induced precession, producing earlier and stronger motion.
Shorter Pin Buffer — Missed Wing
Best for rev-dominant players or players with lower rotation. Missing the wing increases torque-induced precession, keeping the ball cleaner and more continuous through the pins.
2LS LAYOUTS
Missed Wing — 1–3″ Pin-to-COG
Ideal for rev-dominant, lower-rotation players. Missing the wing increases torque-induced precession and improves axis retention.
Hit Wing — 4–5″ Pin-to-COG
Ideal for speed-dominant players. Increases post-drill dynamics, allowing the ball to read earlier with a smoother, controlled shape.
Miss Wing Below — 6″+ Pin-to-COG
A balanced option that blends midlane motion with stronger continuation than traditional designs.