Mizuno has introduced its ST190 metal woods that made their first appearance at the British Masters in 2018.
The ST190 drivers are designed to offer Mizuno’s lowest spin rates, along with enhanced ball speed for increased distance.
Mizuno’s fast Forged SP700 Ti face now has a lighter CORTECH structure for higher ball speeds, with a large carbon composite crown plus the Amplified Wave soleplate, introduced in last year’s ST180 drivers for extra yards.
The Forged SP700 Ti face is over 10 per cent stronger than 6-4 Titanium with a fine grain structure that allows a more complex geometry in the CORTECH face, with re-engineered ribs and a Quick Switch internal structure.
The light 12-gram carbon composite crown allows seven grams of weight to be redistributed to further boost ball speeds and reduce spin rates.
The Amplified Wave Sole features a heavily amplified first wave configuration which expands the ST190’s COR area for improved balls speeds across the clubface, with reduced off-centre performance drop-off.
Harmonic Impact Technology is the result of a study of vibration and soundwaves, which identified the need for internal ribs to create a more solid, powerful impact sound.
The ST190 is designed for mid to low spin with maximum stability, and features a single, factory-fixed six gram backweight that adds MOI for added stability on off-centre strikes.
The ST190G is engineered for low spin and offers intuitive Fast Track adjustability thanks to twin seven grams weights on external tracks that can reduce spin by an additional 200 rpm, allowing players to achieve heavy fade or draw biases by placing the weights in one track.
In early tour testing, two PGA Tour players with different angles of attack achieved significantly lower spin and marked gains in ball speed and distance, with a more level angle of attack favouring the ST190G model and a more downward angle finding the most benefit from the ST190 model.
“The ST190 marks a total change in how Mizuno approaches wood design,” said lead designer Kei Tsjui.
“We now start the development process with our tour players. The tour-tested moulds then become our production moulds. In the case of the ST190, this produced a high-speed driver with extreme low spin for the tour, but with the capability of increasing spin for lower swing speed players,” said Tsjui.
The ST190 driver will be available in men’s 9.5 and 10.5-degree models, both adjustable by two degrees either way, in left and right hand.
The ST190G driver will be available in men’s nine degree, adjustable by two degrees either way, in right hand only.
A range of shafts without upcharge will be available, with new options for 2019, including Atmos Blue 5S, Atmos Red 5R, Atmos Red 5R2, Atmos Red 6R and Atmos Black TS 6S.
ST190 Fairway Woods
The ST190 fairway woods are also speed-engineered and feature a carbon composite crown and amplified Wave soleplate, with a deeper, high-energy HT1770 Maraging steel face.
This deeper clubface is designed to flex more like a driver, in order to maximize ball speed, while the lightweight carbon composite crown allows four grams of weight to be moved low within the clubhead, combining with the deeper clubface for low-spin ball flight.
The Amplified Wave Soleplate’s larger first wave is used to create a balance between stability and sweet spot height to provide off-centre forgiveness without excess backspin. Similar Harmonic Impact Technology to that found in the drivers offers a powerful, solid impact sound.
The ST190 fairway woods will be available in fixed-hosel three and five woods along with an adjustable Tour S 3-wood model that offers a stronger ball flight and offers lofts that can be adjusted from 13 to 17 degrees.
“The ST190’s deeper face is not just useful from the tee. It also gives the clubface a larger frame that functions more like a driver for higher ball speed,” said Tsjui. “Normally, that is compromised by a higher sweet spot and additional backspin, but by using our carbon composite crown and Wave Soleplate, we were able to combine high ball speeds with an efficient ball flight.”
The ST190 fairway woods will be available in a men’s 15 degree three wood (right and left hand), a men’s 18-degree five wood (right hand only) and a men’s adjustable 3-wood TS (13 to 17 degrees, right hand only)
A range of shafts without upcharge will be available, with new options for 2019 including Atmos Blue 6R, Atmos Red 6S, Atmos Red 6R and Atmos Black TS 7S.