In short
The Titleist TSi4 (2021) is a low-spin, workable driver for faster swing speeds. It comes in 9° to 10.5° lofts with a 440cc head and an adjustable hosel. It carries a $549 MSRP.
Refresh due soon
Brands in this category update about every 2 years, and the TSi4 is 5 years old with no successor yet, so a new model could land any time. Grab it at clearance pricing now, or wait a few weeks to see what replaces it.
Based on release timing and this line's typical refresh cycle, not a live price quote.
Modeled from the $549 original MSRP and a 5-year-old release (about 22% of MSRP retained used).
Used market value
$105 - $135
Private sale, fair to like-new
Trade-in value
$65 - $95
What a shop typically pays
Get an exact quote
Estimate only, from a depreciation model, not a live quote. Search “Titleist TSi4” on the sites above for the real number, which varies with condition, shaft, and demand.
| Loft | Shaft | Flex | Weight | Kick Point | Torque |
|---|---|---|---|---|---|
| 9.0° | Project X HZRDUS Red 60 | X-Stiff | 60g | Low | 3.9° |
| 10.5° | Project X HZRDUS Red 55 | Stiff | 55g | Low | 4.8° |
The TSi4 is the driver Titleist built for players who spin the ball too much and want the smallest margin between a good swing and a great one. At 440cc, it sits well under the 460cc limit that most drivers chase, and that compact shape tells you exactly who it's for. This is a low-spin head aimed at fast swingers who deliver the club consistently and don't need the head doing extra work for them.
The whole point of the TSi4 is spin reduction. Titleist moved the center of gravity low and forward, which knocks RPMs off the ball flight and produces a flatter, more penetrating launch. For a player carrying too much spin off the tee, that change alone can add real distance and take the ballooning miss out of play. The tradeoff is honesty: a 440cc head with forward CG is less forgiving than its bigger TSi2 and TSi3 siblings, and it doesn't hide a bad strike.
It's adjustable through Titleist's SureFit hosel, so you can dial loft and lie to fine-tune launch and shape your bias. But adjustability won't turn this into a game-improvement driver. The TSi4 is a specialist tool, and if you're the swing speed it was made for, it rewards you. If you're not, the TSi3 is almost always the smarter pick.
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