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Outer shell of the ball
ALL NEW MP Gen 4 Reactive ™
Surface texture on the ball (sanded, polished, etc)
500, 1000, 2000, 4000 Abralon®
Lane Condition
Length and/or amount of oil on the lane
Color of the ball
Steel Blue/Black/Gold
Available weights
12-16 LBS
Weight block inside the ball
Core Type
Basic shape type of the core (Symmetric, Asymmetrical, Pancake)
Asymmetrical L
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. - .046
15 LB. - .040
16 LB. - .040
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.

505T Honor Roll

< See All
  • Chris Thompson227-300-287-814
  • Gary Schlafke277/686
  • Christopher J Pringle300/830
  • Richard Allison300/805
  • Marc Bynum300
  • Chris Moore197-246-257
  • Christopher Meloy245-300-256/801
  • George Everett641
  • Tyler hayes257 241 216 / 714

505T Product Notes


Track’s 505T is a ball that clears the heads well, is very strong in the mid-lane, and continues through the body of the pattern. The 505T is constructed with the proven shuttle core, its final appearance in the Track line. The shuttle core was then wrapped with a brand new coverstock blend, the MP GEN 4 – creating the strongest coverstock Track has ever used in a mid priced ball. 

Find the 505T in a Pro Shop near you >

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