RB 566
A soft two-piece ionomer (durable, firm cover) ball featuring an innovative 566 micro-dimple design (tiny dimples that extend hang time) that maximizes carry distance for golfers with slower swing speeds.
What do these specs mean?
Compression
How soft the ball feels. Lower numbers (70–80) compress easier and help slower swings get distance. Higher (90+) rewards faster swings.
Cover
Surlyn is tough and cheap — great for distance and durability. Urethane is softer and grips wedges for more spin around the green.
Layers
2-piece: simple, long, straight. 3-piece and 4-piece add layers for more feel and spin control on approach shots.
Trajectory
How high the ball flies. Low = flatter flight with more roll. High = peaks up and lands soft. Mid = balanced.
Spin
Low spin = straighter shots, less curve, more roll. High spin = more control and stopping power on the green (but also magnifies slices/hooks).
Tier
Price bucket. Value = budget-friendly distance balls. Mid = solid all-around. Premium = tour-level spin and feel, costs more per dozen.
Best For
Try a sleeve first — ~$5 for 3 balls before committing to a dozen.
A soft two-piece ionomer (durable, firm cover) ball featuring an innovative 566 micro-dimple design (tiny dimples that extend hang time) that maximizes carry distance for golfers with slower swing speeds.
Who It’s For
The Mizuno RB 566 is built for slower swing speeds (under ~95 mph). It suits golfers who prioritize slow swing speed, seniors, high handicap, budget friendly. In the Mizuno lineup, the RB 566 sits softer than the Mizuno RB Max.
Feel
With a compression of 60 and a ionomer cover, feel is noticeably soft off the face — marshmallow at impact, quiet off the putter.
Spin Profile
Expect low driver spin for more carry and roll — forgiving of minor strike inconsistency. Around the green, the cover gives you workmanlike short-game spin — not tour-grade, but dependable for chips and pitches.
Trajectory & Construction
A mid-flight window — versatile across course conditions. The 2-piece construction uses a straightforward two-piece build — a large core for distance and a cover tuned for durability over spin separation. Performs well in cooler temperatures.
Price & Value
At $21.99 per dozen, the RB 566 is a value pick. Expect distance and durability over tour-grade wedge spin.
Buy it if
- Your swing speed is under ~95 mph and you want a ball that actually compresses.
- You play a lot of shoulder-season or cold-weather golf.
- You slice or hook under spin and want a ball that amplifies your good drives.
Skip it if
- You swing over 105 mph — you’ll overcompress the core and lose carry.
- You score in the 70s and greenside spin is your scoring advantage.
Similar Balls
- Titleist Tour Soft — 70 compression, low-spin, $40
- Titleist Velocity — 70 compression, low-spin, $30
- Titleist TruFeel — 50 compression, low-spin, $25
- Callaway ERC Soft — 60 compression, low-spin, $40
Frequently Asked Questions
Who should play the Mizuno RB 566?
The Mizuno RB 566 is built for slower swing speeds (under ~95 mph). It suits golfers who prioritize slow swing speed, seniors, high handicap, budget friendly.
What swing speed is the Mizuno RB 566 designed for?
It performs best at swing speeds under roughly 95 mph — compressing a higher-compression ball would sacrifice distance for slower swingers.
Does the Mizuno RB 566 have high greenside spin?
Greenside spin is moderate. The cover prioritizes durability and distance over tour-grade bite on wedge shots.
Is the Mizuno RB 566 good in cold weather?
Yes. The softer core retains feel and carry distance in temperatures below 60°F better than higher-compression alternatives.
How much does the Mizuno RB 566 cost?
MSRP is $21.99 per dozen.
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