RB 566 is Mizuno's value entry, a two-piece, 60-compression ionomer ball built around a large, high-energy core and a namesake 566-dimple pattern that combines dual dimples (a dip within each dimple) with surrounding micro-dimples to sustain lift through the shot. It's aimed at everyday players in the 75-95 mph swing speed range who want solid distance and greenside control without paying tour-ball prices.
A firmer, more responsive feel than most value balls in its price range, with reduced driver spin and enough greenside control for a two-piece ionomer construction.
Fits swing speeds of roughly 75-95 mph wanting distance and reasonable green control at a mid-value price; faster swingers or low handicappers will still prefer Mizuno's premium urethane balls.
A newer, lower-volume release than the legacy value brands, so used supply is thinner for now, though its durable ionomer cover should hold up well over time.
Reading is one thing — feeling it off the face is another. Book a bay and hit a sleeve before you buy anywhere.
