Brunswick Crown 78U Bowling Ball

The Brunswick Crown 78U is built for today’s competitive landscape, offering urethane reliability that meets new USBC regulations while delivering a stronger, more dynamic motion than traditional low-flare urethane options. Designed for bowlers who rely on urethane on sport patterns, but need added versatility and power, the Crown 78U fills a gap in the modern market with a motion that stands apart.

At the core of its performance is the Tiered Hexagon engine—borrowed from the Crown Victory—and tuned to a higher RG with medium differential. This gives the Crown 78U more flare potential than standard urethane pieces, helping overcome the natural limitations of a firm 78-durometer cover. The result is a controllable yet more responsive urethane motion that blends wet/dry better and creates added shape when the pattern demands precision.

Wrapped in Brunswick’s newly formulated 78U urethane shell, the Crown 78U is built for bowlers looking for a urethane option that not only complies with competition standards, but also gives them a stronger, more usable shape across tougher sport conditions and higher-rev environments.

Key Features:

78-Durometer Urethane Cover

Meets current USBC hardness rules for national competition and offers a firmer, more durable reaction.

Tiered Hexagon Core

Higher RG and medium differential design delivers increased flare potential—rare for urethane.

More Dynamic Urethane Motion

A stronger footprint than standard low-flare urethane, giving bowlers more shape and control on demanding patterns.

Tournament-Ready Control

Ideal for sport shots, high-rev players, and anyone seeking a urethane option that hits the sweet spot between predictability and performance.

• Brand Brunswick
• Release Date December 11th, 2025
• Color Purple/Grey
• Coverstock Name Urethane Solid 78D
• Coverstock Type Urethane
• Factory Finish 500, 1000 Siaair
• Core Name Tiered Hexagon
• Core RG 2.549
• Differential 0.046