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Roto Grip RG Jester Clear Polyester specs
The Roto Grip RG Jester Clear Polyester is a polyester (plastic) ball with the 3 Piece core. Here are its published specs, how they compare with the other current balls in our table, and what the numbers mean on the lane.
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| Coverstock | Clear Poly |
|---|---|
| Cover type | Polyester |
| Core (weight block) | 3 Piece |
| Core type | Symmetric |
| RG | 2.690 |
| Differential | 0.006 |
| Factory finish | 3500 Grit Polished |
| Flare potential (maker) | Low |
| Maker's category | EP |
| Color | Bichrome-Black/Red |
| Weights | 14-16 lb (weight selector) |
| Release date (maker) | 10/18/24 |
Numbers as Roto Grip publishes them, checked 21 October 2026. Roto Grip doesn't say which ball weight these numbers are for. Drilling changes how a ball behaves, so a pro shop's layout matters as much as these numbers.
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What the numbers mean
Polyester cover. Polyester (plastic) is the cover used for spare balls and house balls: it grips the lane least, so the ball goes nearly straight. See our plastic spare ball review.
Symmetric core. Storm says symmetric balls have "RG values consistent across all axes" and a smooth, predictable roll.
USBC allows an RG from 2.447 to 2.813 inches and a differential of at most 0.060 inches (Equipment Specifications Manual, March 2026). Our ball spec table lists every current ball we track, and who makes bowling balls covers which company owns Roto Grip.
Balls with similar numbers
Same cover type, closest RG and differential in our table:
- Storm Ice Storm Ocean Blue-White: RG 2.680, differential 0.006
- Storm Ice Storm Teal-Silver-Graphite: RG 2.680, differential 0.006
- Roto Grip Cosmos: RG 2.680, differential 0.006
- 900 Global Onyx Polyester: RG 2.680, differential 0.006
Sources: Roto Grip product page; Storm, "Inside The Bowling Ball"; Storm, "The Coverstock"; USBC Equipment Specifications Manual.