Several Titleist staff players quickly changed into the company’s new TSi2 and TSi3 drivers when they became available last fall. Justin Thomas, Jordan Spieth, Cameron Smith and J.T. Poston all switched because they liked the blend of distance and forgiveness the clubs delivered.
While Titleist believes custom fitters can help most golfers achieve their goals using those two clubs, there are outliers. Some are moderate-speed players who need a club designed to boost spin, carry distance and forgiveness. Others are hard-swinging golfers who need an ultra-low spinning driver to keep the ball from ballooning to maximize distance.
For those players, Titleist is offering the TSi1 woods and the TSi4 driver to complement the TSi2 and TSi3.
TSi1 driver, fairway woods and hybrids
Titleist TSi1 driver (Titleist)
The TSi1 driver ($549) – available in 9, 10 or 12 degrees of loft – shares many attributes with the TSi2 and TSi3 but is significantly lighter. The club comes standard with a 40-gram Aldila Ascent graphite shaft. The idea is that if the club is lighter, moderate-speed golfers will be able to generate more clubhead speed, and that should translate to more distance.
The 460-cubic-centimeter TSi1 driver is about 40 grams lighter than a typical driver, and Titleist gave it an aerodynamic shape and an ATI 425 aerospace-grade titanium face like the ones in the TSi2 and TSi3. The titanium alloy flexes easily at impact, but its strength makes it durable.
The TSi1 has a low and back center of gravity that encourages a higher launch, and it features the most draw bias of any Titleist driver.
Titleist TSi1 fairway woods (Titleist)
With the TSi1 fairway woods ($299), Titleist designers once again reduced weight, but not at the expense of forgiveness. The company said the TSi1 fairway woods have the same moment of inertia as the TSi2 fairway woods, even though they weigh about 50 grams less. This was achieved by moving the center of gravity farther back, which also encourages a higher launch.
The TSi1 fairway woods, which will come standard with a 40-gram Aldila Ascent graphite shaft, will be available in 15-, 18-, 21- and 23-degree models.
Titleist TSi1 hybrids (Titleist)
To complement the drivers and fairway woods, Titleist is also offering TSi1 hybrids ($279) in 20-, 23-, 26- and 29-degree versions. (The 29-degree is available in right-hand only.) They are fairway wood-style hybrids with a wide sole, deep center of gravity and high moment of inertia for stability.
Like the other woods, they were designed to be extremely light and produce high-flying shots to maximize carry distance. The forged 455 Carpenter steel faces are designed to flex more efficiently at impact to maximize ball speed.
Each of the Titleist TSi1 woods and hybrids will be in stores starting Feb. 26.
Titleist TSi4 driver (Titleist)
Adam Scott and Russell Henley generate a lot of spin off the tee, even by PGA Tour standards. For that reason, both players recently switched into Titleist’s 430-cubic-centimeter TSi4 driver ($549).
The lowest-spinning driver in the Titleist lineup, the TSi4 has a classic pear shape in the address position. What sets it apart from other Titleist drivers is its center of gravity. A weight in the sole was added directly behind the leading edge, and it pulls the center of gravity down and forward. That increases ball speed and reduces dynamic loft, which then reduces spin and launch angle.
Like the TSi1, TSi2 and TSi3, the TSi4 is an all-titanium construction with a forged ATI titanium face and adjustable hosel. It will be available in 8-, 9- and 10-degree versions and come standard with a Project X HZRDUS Smoke Yellow 60 or Mitsubishi Tensei AV White Raw 65 shaft. The TSi4 driver will be in stores starting Feb. 26.