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files/roto-grip-perfect-gem-bowling-ball.png
The legend evolves — and it might be the most complete Roto Grip ball yet.
The Perfect Gem pairs the recalibrated GEM + A.I. Core Technology asymmetric weight block with Roto Grip's brand-new E-R1 (EXTREME-Response Version 1) Solid Reactive coverstock. The nano-free E-R1 formulation creates a completely different footprint on the lane compared to previous-generation solids — cleaner through the heads with a more extreme response down lane. A 2000-Grit Abralon factory finish blends front-lane traction with recovery, so the cover preserves its response even as the pattern transitions.
Who It's For
- Bowlers who crave maximum reaction without early burnout
- Medium/Heavy to Heavy oil patterns
- Higher-rev players wanting continuation through the pins
Ball Specifications
- Coverstock: E-R1 Solid Reactive
- Core: GEM + A.I. Core Technology (Asymmetric)
- Factory Finish: 2000-Grit Abralon
- RG (15 lb): 2.49
- Differential (15 lb): 0.057
- Intermediate Differential (15 lb): 0.017
- Flare Potential: High
- Color: Pink / Rose / Onyx
Backed by expert drilling, fast shipping, and the best prices on performance gear.
The legend evolves — and it might be the most complete Roto Grip ball yet.
The Perfect Gem pairs the recalibrated GEM + A.I. Core Technology asymmetric weight block with Roto Grip's brand-new E-R1 (EXTREME-Response Version 1) Solid Reactive coverstock. The nano-free E-R1 formulation creates a completely different footprint on the lane compared to previous-generation solids — cleaner through the heads with a more extreme response down lane. A 2000-Grit Abralon factory finish blends front-lane traction with recovery, so the cover preserves its response even as the pattern transitions.
Who It's For
- Bowlers who crave maximum reaction without early burnout
- Medium/Heavy to Heavy oil patterns
- Higher-rev players wanting continuation through the pins
Ball Specifications
- Coverstock: E-R1 Solid Reactive
- Core: GEM + A.I. Core Technology (Asymmetric)
- Factory Finish: 2000-Grit Abralon
- RG (15 lb): 2.49
- Differential (15 lb): 0.057
- Intermediate Differential (15 lb): 0.017
- Flare Potential: High
- Color: Pink / Rose / Onyx
Backed by expert drilling, fast shipping, and the best prices on performance gear.
- Regular price
- $289.95
- Sale price
- $199.95
Product Description
The legend evolves — and it might be the most complete Roto Grip ball yet.
The Perfect Gem pairs the recalibrated GEM + A.I. Core Technology asymmetric weight block with Roto Grip's brand-new E-R1 (EXTREME-Response Version 1) Solid Reactive coverstock. The nano-free E-R1 formulation creates a completely different footprint on the lane compared to previous-generation solids — cleaner through the heads with a more extreme response down lane. A 2000-Grit Abralon factory finish blends front-lane traction with recovery, so the cover preserves its response even as the pattern transitions.
Who It's For
- Bowlers who crave maximum reaction without early burnout
- Medium/Heavy to Heavy oil patterns
- Higher-rev players wanting continuation through the pins
Ball Specifications
- Coverstock: E-R1 Solid Reactive
- Core: GEM + A.I. Core Technology (Asymmetric)
- Factory Finish: 2000-Grit Abralon
- RG (15 lb): 2.49
- Differential (15 lb): 0.057
- Intermediate Differential (15 lb): 0.017
- Flare Potential: High
- Color: Pink / Rose / Onyx
Backed by expert drilling, fast shipping, and the best prices on performance gear.
