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Proof Pearl

Upper-Mid Performance

Outer shell of the ball
Prime Response Pearl
Surface texture on the ball (sanded, polished, etc)
500, 1000 Siaair / Crown Factory Compound
Lane Condition
Length and/or amount of oil on the lane
Medium to heavy oil
Color of the ball
Black / Smoke Pearl
Available weights
16-12 LBS
Weight block inside the ball
Core Type
Basic shape type of the core (Symmetric, Asymmetrical, Pancake)
Radius of Gyration: measurement related to weight distribution of the core. This affects how quickly a ball will get in to a roll. A ball with a higher RG will roll later. A ball with lower RG will roll sooner.
16 LB. - 2.506
15 LB. - 2.519
14 LB. - 2.538
13 LB. - 2.589
12 LB. - 2.612
Difference between the RG of the core's x-axis and y-axis. Indicates track flare potential and stability. A higher differential means more flare potential and less stabilty. A low differential ball will be more stable and have less flare potential.
16 LB. - 0.052
15 LB. - 0.052
14 LB. - 0.052
13 LB. - 0.043
12 LB. - 0.043
Intermediate Differential 
Difference between the RG of the core's x-axis and Z-axis on an asymmetrical core. Indicates the asymmetry of the core. A higher intermediate differential ball will be less stable and will transition more quickly from skid to roll than a ball with lower intermediate differential.

Proof Pearl Product Notes

Follow up to a great ball!

It’s been a long-time since we’ve tested a ball like the Proof. A ball that looked great for everyone regardless of style and bowlers all over the world have confirmed this. While the Proof is known as a great ball, we are excited to follow it up with the Proof Pearl, a shiny version that gives you the same great reaction, that’s intended for more medium oil lane conditions.

Stay Informed

Find the Proof Pearl in a Pro Shop near you >

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