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Outer shell of the ball
Reactive Pearl
Surface texture on the ball (sanded, polished, etc)
Reactive Pearl
Lane Condition
Length and/or amount of oil on the lane
Color of the ball
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.
14 LB. - 2.46
15 LB. - 2.48
16 LB. - 2.49
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.
14 LB. - .040
15 LB. - .040
16 LB. - .005
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.

505C Honor Roll

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  • Jon Stuart300/800
  • Jack Hoskins300/775
  • Paul Sanchez251/286/277 = 814
  • Chris Moore300/736

505C Product Notes

Manufacturer's Intent

This all new 5 series, the 505C, was designed to own the breakpoint for those challenging times when controlling your breakpoint down the lane is the key to success. Each new ball from Track will now include a microfiber cleaning pouch with instructions on its use. We feel this will be a great addition to help our customers maintain their performance products.

Find the 505C in a Pro Shop near you >

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