DRIVER
Titleist TSi1
2021
The TSi1 is Titleist's lightest, most forgiving, most draw-biased 2021 TSi driver, built to add clubhead and ball speed for slower-swing-speed golfers without sacrificing much control.
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GEARCADDIE FIT VERDICT
Who should play this club — and why
BEST FOR
Golfers with swing speeds under roughly 90 mph seeking more distance, easier launch, and extra forgiveness from a lightweight build.
PROBABLY SKIP IT IF
Faster-swing-speed players or better ball-strikers who want to shape shots, since workability and shot-shaping options are limited by the built-in draw bias.
WHAT TO CHECK IN A FITTING
Fit the complete club rather than selecting only by head loft; the lightweight shaft, grip and 45.75-inch length materially affect the club's performance. Confirm that the extra launch and draw bias do not create too much curvature or spin.
VERIFIED PRODUCT FACTS
What is specific to this model
Titleist built the TSi1 as the lightest, most draw-biased driver in the TSi line, aimed at golfers with moderate-to-slow swing speeds (under ~90 mph, roughly 30% of golfers) who want more clubhead and ball speed. Titleist describes it as high-launching with mid spin, built around super-lightweight components and a deep, face-centered CG for increased launch and speed.
head size cc
460
lofts
9.0° RH, 10.0° RH/LH, 12.0° RH
standard lie
59°
standard length
45.75" (men); 44.5" (women)
approximate total weight
Approximately 40g lighter than a standard driver (no absolute gram figure independently confirmed)
face material
ATI 425 military-/aerospace-grade titanium alloy
stock shaft
Aldila Ascent (Ultralight)
stock grip
Golf Pride Tour Velvet 360
loft lie adjustment
SureFit Hosel, 16 loft/lie combinations, up to ±1.5° via sleeve/ring settings
GEARCADDIE MODEL ANALYSIS
What this exact club is designed to do
The TSi1 is Titleist's lightest, most forgiving, most draw-biased 2021 TSi driver, built to add clubhead and ball speed for slower-swing-speed golfers without sacrificing much control.
WHAT YOU SHOULD NOTICE
Produces high launch and consistent ball speed/spin across the face, with a noticeable draw bias that helps players who fight a slice hit straighter tee shots.
MAIN BENEFIT
Meaningful clubhead/ball speed gains from the ~40g weight savings, paired with high launch and strong forgiveness.
WATCH OUT FOR
Limited shot-shaping ability, spin that can run a bit low for some swings, and (per Golf Monthly) higher sensitivity to wind due to the high launch profile.
Full technology & specs list
head size cc
460
lofts
9.0° RH, 10.0° RH/LH, 12.0° RH
standard lie
59°
standard length
45.75" (men); 44.5" (women)
approximate total weight
Approximately 40g lighter than a standard driver (no absolute gram figure independently confirmed)
face material
ATI 425 military-/aerospace-grade titanium alloy
stock shaft
Aldila Ascent (Ultralight)
stock grip
Golf Pride Tour Velvet 360
loft lie adjustment
SureFit Hosel, 16 loft/lie combinations, up to ±1.5° via sleeve/ring settings
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