Weight
15 pounds
PBA Approval Date
Release Date
Discontinued
The "Classic" is back. Roto Grip is proud to announce the release of the SD-73 "Classic". The ball that created the most controversy ever in the industry is back by popular demand.
The Low RG (2.50), High Differential (.073) weight block is illegal by today's USBC standards, but since it was approved prior to the rule change it is perfectly legal for all USBC and PBA Regional competition.
The Sure Grip solid reactive coverstock is a performance proven winner over the last several years and is still one of the highest friction coverstocks on the market today.
Factory Finish
1000 Abralon
Sure Grip Solid Coverstock
Type
Solid Reactive
High density cylinder with "flip" block Core
Core Type
Symmetric
16 pounds
RG
2.500
Diff
0.071
15 pounds
RG
2.510
Diff
0.073
14 pounds
RG
2.570
Diff
0.051
13 pounds
RG
2.600
Diff
0.032
12 pounds
RG
2.600
Diff
0.032
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