Bowling ball core · 900 Global
900 Global Strobe A.I. Core
Asymmetric 900 Global core
An asymmetric core with mid-lane rev-up and high flare, built for medium to heavy oil. 2 of the 2 balls with this core are in stock at BowlersMart.
- Asymmetric
- RG 2.510
- Diff 0.052
- MB 0.016

Specs
RG AT 15 LB
2.510
Mid-lane rev-up
53% of the reactive and urethane balls we stock have a lower RG.
DIFFERENTIAL AT 15 LB
0.052
High flare
75% of the reactive and urethane balls we stock have a lower differential.
MASS BIAS AT 15 LB
0.016
Mild asymmetry
33% of the asymmetric reactive and urethane balls we stock have a lower mass bias.
| Weight | RG | DifferentialDiff | Mass biasMB |
|---|---|---|---|
| 16 lb | 2.500 | 0.050 | 0.014 |
| 15 lbUsed on this page | 2.510 | 0.052 | 0.016 |
| 14 lb | 2.520 | 0.051 | 0.014 |
| 13 lb | 2.560 | 0.034 | 0.011 |
| 12 lb | 2.580 | 0.031 | 0.009 |
Source: 900 Global published specs, as listed on the 900 Global Viking Conquest product page. RG and differential change with ball weight; use the row for the weight you throw. The highlighted 15 lb row is the one used on this page.
Balls with the 900 Global Strobe A.I. Core
2 of the 2 balls with the 900 Global Strobe A.I. Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.
Solid covers
Solid covers grip the lane soonest and suit heavier oil.

900 Global RB 94 Solid Reactive
Medium to heavy oil
Hybrid covers
Hybrid covers mix solid grip with pearl length.

900 Global RB 90 Hybrid Reactive
Medium to heavy oil
Where the 900 Global Strobe A.I. sits
Each dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.
Navy ring = a ball in your bag. Dashed ring = off this chart, or this same core.
Nearest cores, zoomed in
Navy ring = a ball in your bag. Dashed ring = off this chart, or this same core.
This core 1 Nearest cores Other cores
| Core | Brand | Shape | RG | Diff | vs this core |
|---|---|---|---|---|---|
|
|
Roto Grip | Asymmetric | 2.510 | 0.051 | RG 0.000 · Diff −0.001 |
|
|
Ebonite | Asymmetric | 2.515 | 0.052 | RG +0.005 · Diff 0.000 |
|
|
DV8 | Asymmetric | 2.504 | 0.051 | RG −0.006 · Diff −0.001 |
|
|
Brunswick | Asymmetric | 2.502 | 0.051 | RG −0.008 · Diff −0.001 |
|
|
Ebonite | Symmetric | 2.508 | 0.054 | RG −0.002 · Diff +0.002 |
|
|
Hammer | Symmetric | 2.520 | 0.052 | RG +0.010 · Diff 0.000 |
Matches use 15 lb RG and differential.
Drilling and tools
Turn on JavaScript to compare with your ball.Balls with the 900 Global Strobe A.I. Core2 of the 2 balls with the 900 Global Strobe A.I. Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.Solid coversSolid covers grip the lane soonest and suit heavier oil.
Questions bowlers ask
What is the RG of the 900 Global Strobe A.I. Core?
At 15 lb the 900 Global Strobe A.I. Core has an RG of 2.510. It ranges from 2.500 to 2.580 across the listed weights.
What is the 14 lb RG of the 900 Global Strobe A.I. Core?
At 14 lb the RG is 2.520.
What is the differential of the 900 Global Strobe A.I. Core?
At 15 lb the differential is 0.052. The mass bias is 0.016.
Which bowling balls use the 900 Global Strobe A.I. Core?
900 Global Viking Conquest Bowling Ball, 900 Global Viking Bowling Ball. 2 are in stock now.
How do the 900 Global Strobe A.I. Core specs change by weight?
At 16 lb: RG 2.500, differential 0.050, mass bias 0.014. At 12 lb: RG 2.580, differential 0.031, mass bias 0.009.
How does the 900 Global Strobe A.I. Core compare with my ball?
Type the ball you throw into the Compare with your ball box on this page. It shows the RG and differential side by side and saves your bag for every core page.
Sources and method
Specs. 900 Global published specs, as listed on the 900 Global Viking Conquest product page, as published by the manufacturer.
Baseline. The baseline is 212 in-stock, published reactive and urethane balls. Plastic and polyester covers, 2-piece, 3-piece and pancake cores, missing covers and missing RG or differential values are excluded.
Percentiles. Percentiles are the share of baseline balls with a strictly lower or higher value; ties are not counted.
Nearest cores. Nearest cores are ranked by distance on standardized 15 lb RG and differential, with the same symmetric or asymmetric shape preferred among near ties (distance bands of 0.1).
Mass bias. Mass bias is compared among asymmetric balls with numeric mass bias only.
Updated. Catalog and page updated 2026-10-16.


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