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Titleist adds TSi4 driver and TSi1 driver, fairway wood, and hybrid

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Finding the right driver is all about fitting. To better help more golfers find the perfect fit, Titleist is extending the new TSi Series with the TSi4 driver and the TSi1 driver, which will also for the first time be offered with an accompanying TSi1 fairway wood and hybrid.

The additional TSi1 and TSi4 drivers should be no surprise considering the success both the original TS4 and TS1 drivers had with helping golfers outside of the main chunk of the fitting bell curve optimize launch condition and gain distance and control. But what is new is the additional TSi1 fairway wood and hybrid, which allows more golfers to get the same driver optimization further into their golf bags to help with scoring and increase shot trajectory.

Titleist TSi driver technology recap

If you would like to go in-depth on the technology packed in the TSi series, you can check out the original Titleist TSi2 and TSi3 driver launch piece here: 2021 Titleist TSi2 and TSi3 drivers continue the Titleist Speed Project, but let me give you a quick recap.

  • New ATI-425 Titanium face insert: This Titanium alloy allows engineers to make the faces thinner to reduce weight while also increasing the overall elasticity for better ball speed retainment. This leads to higher COR/CT around the entire face while still keeping within compliance of the rules. Compared to the conventional titanium alloys used in golf, offers a six-percent higher yield strength, four-percent higher tensile strength, and most importantly a 30-percent higher ductility.
    The material name comes from Allegheny Technologies Incorporated, a massive specialty materials company headquartered in Pittsburgh, PA.
  • Faster shape: The reshaping of the driver has created on average a 15-percent reduction in total drag around the head thanks to improved aerodynamics.
  • Higher MOI and tighter spin robustness: Using the new material to save weight from the face, allows the TSi Series drivers to have boosted MOI over the previous generation beyond the traditional heel and toe forgiveness. The drivers are also more stable higher and lower on the face to help boost “high-low” MOI to create smaller launch windows and greater spin robustness – which is another way of saying the head creates more consistent numbers and smaller standard deviation from optimal conditions when hit off-center.

Titleist TSi4 driver

The TSi4 driver is for, as Titleist likes to say, “The player seeking ultra-low spin performance with advanced speed.” The TSi4 is the most workable driver in the Titleist line thanks to its smaller shape (430cc) and low and forward center of gravity.

This low and forward CG helps produce on average 250 rpm less spin than the new TSi3, and if you already happen to have a TS4, it will offer a further 130 rpm lower spin on average while also providing a half degree of extra launch.

These are incremental improvements, but it’s important to note that when working with golfers on the highest end of the speed and spin spectrum, every single percentage point matters and that is what the TSi4 driver delivers.

TSi4 driver specs

The TSi4 will be available in the lofts of 8.0°, 9.0°, and 10.0°, with only the 9.0° head available in left-handed.

The featured shafts are the Mitsubishi Chemical Tensei AV White RAW 65 and ProjectX HZRDUS Smoke Yellow 60.

TSi1 driver, fairway wood, and hybrid

The TSi1 driver has been optimized for moderate swing speed players—those who swing at less than 90mph with their driver—to increase club speed, resulting in faster ball speeds, more distance, and greater control, thanks to an overall lightweight design.

When I say lightweight, I mean lightweight! The TSi1, in a standard configuration with its featured shaft, comes in at just over 40 grams lighter than most standard drivers. This lighter package makes it easier to control and also helps the target player gain just under 2 mph on average based on Titleist’s extensive testing.

This leads to an extra 1 mph of ball speed compared to the previous generation TS1 thanks to the new shape and face design and also results in a gain of 300 rpm, which for players in this speed range helps increase carry and distance.

TSi1 driver specs

The TSi1 will be available in the lofts of 9.0°, 10.0°, and 12.0°, with only the 10.0° head available in left-handed.

The featured shaft is the lightweight Aldila Ascent which only weighs 40g in the  S, R, and R2 flexes and 35g in the R3

TSi1 Fairway wood

The Tsi1 fairway woods as you have probably already concluded is designed for the same moderate speed player, and offer the same technology package as the TSi2 and TSi3: Titleist introduces new 2021 TSi2 and TSi3 fairway woods

Fairway woods are key for this golfer because they hit them more often on approaches into greens and this is where the extra height and spin can be a big benefit.

When compared to a traditional fairway wood the TSi1 is a remarkable 50g lighter, but even in this lighter package it still offers a higher MOI than the TSi2 thanks to the shallow shape and repositioned mass. According to Titleist player testing the targetted golfers gaining just under 1 mph of additional clubhead speed, which resulted in an increase of 1 mph ball speed., as well as hight and spin.

TSi1 fairway wood specs

The TSi1 fairway woods will be available in the lofts of 15.0°, 18.0°, 20°, and a completely new 23° 9 wood through custom order.  The lofts available in left-handed include the 15° and 18°.

The featured shaft is the lightweight Aldila Ascent which only weighs 40g in the  S, R, and R2 flexes and 35g in the R3

TSi1 hybrid

If the TSi1 fairway was a surprise then the TSi1 hybrid should be a shock – I know it was for us when we were first introduced to the club. Titleist has never put a large focus of their R&D into hybrids designed for moderate speed players, instead, most of the work has been used to focus on hybrids designed for higher speed golfers – that is until now.

Like the rest of the TSi1 metal woods, the hybrids are about greater MOI and launch, and the new TSi1’s are the highest MOI hybrid Titleist has ever built. They are on average 20g lighter than a standard hybrid and feature a larger profile “wood-style” design to generate more green holding spin.

In Titleist player testing, which is a crucial element of the development process, the target players gained just over .5 mph in clubhead speed and ball speed, according to Titleist, and for golfers looking for maximum performance, these are measurable gains that lead to better results.

TSi1 hybrid specs

The TSi1 hybrids will be available in the lofts of 20°, 23°, 26°, and a 29° 7H. The lofts available in left-handed are 23° and 26°.

The featured shaft is the lightweight Aldila Ascent Hy in 55g S and R, 50g R2, and 40G R3 flex.

TSi4 and TSi1 series, price, and availability

Both drivers are priced at $550 with featured shafts, while the featured Graphite Design shafts are an additional $200, totaling $750.

The Tsi1 fairway woods will be $299, and the TSi1 hybrids will be priced at $279

The new 2021 Titleist TSi4 driver and TSi1 driver, fairway woods, and hybrids will be available for custom fitting beginning February 16 2021, through Titleist authorized dealers, fitting centers, and at Titleist Thursday events being held nationwide. They will be at retail on shelves starting February 26th.

Ryan Barath is a club-fitter & master club builder with more than 17 years of experience working with golfers of all skill levels, including PGA Tour players. He is the former Build Shop Manager & Social Media Coordinator for Modern Golf. He now works independently from his home shop and is a member of advisory panels to a select number of golf equipment manufacturers. You can find Ryan on Twitter and Instagram where he's always willing to chat golf, and share his passion for club building, course architecture and wedge grinding.

4 Comments

4 Comments

  1. Pingback: Best driver 2022: Expert club fitters recommend the best driver for you – GolfWRX

  2. Tom

    Apr 9, 2021 at 8:35 pm

    Anybody know what the standard sole weight weighs in the TSi4?

    Thanks!

  3. James

    Mar 7, 2021 at 3:05 pm

    How much does the TSi1 weigh? It says 40 grams less, is that head weight?

  4. SHAD GOLDSTON

    Feb 17, 2021 at 9:47 am

    Kuchar is the GOAT!

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Whats in the Bag

Christiaan Maas WITB 2026 (June)

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Driver: TaylorMade Qi4D LS (8 degrees)
Shaft: Fujikura Ventus TR Blue 6 X

3-wood: TaylorMade Qi10 (15 degrees)
Shaft: Fujikura Ventus Black 9 TX

Irons: TaylorMade P770 (3), TaylorMade P7CB (4), TaylorMade P7TW (5-PW)
Shafts: Fujikura Ventus Black HB 10 X, True Temper Dynamic Gold X100

Wedges: TaylorMade Prototype (50-SB09), TaylorMade MG5 (56-HB12, 60-LV07)
Shafts: True Temper Dynamic Gold S400

Putter: TaylorMade TP Juno

Ball: Titleist Pro V1x

Grips: Golf Pride Tour Velvet Cord

Check out more in-hand photos of Christiaan Maas’ clubs here.

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Equipment

TaylorMade MySpider Tour and Tour X: More customizable build options now available

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TaylorMade Golf’s MySpider program underwent a substantial overhaul over the last month. Firstly, the company launched the option to customize the Spider ZT model, and now the program has returned with the MySpider Tour and MySpider Tour X.

The revamped page now gives golfers complete control over every visual and functional detail of their putter on the popular Tour and Tour X head, with every cosmetic idea thought of. In MySpider Tour, golfers can choose from four head finishes, 16 paint fill colors, nine Surlyn face insert colors, three aluminum insert options, six sightline configurations, and four hosel options — L-neck, small slant, double bend, center shaft. Six sightline options are available in MySpider Tour, including the optically engineered True Path alignment system. MySpider Tour X gives builders the option of four head finishes, four hosel configurations, and five sightline options, also including True Path alignment.

One of the more interesting features of the new MySpider program is the availability of three distinct face insert options. Along with the usual Surlyn Pure Roll insert trusted by Scottie Scheffler and Rory McIlroy, which can be customized from nine colors, golfers can now also select firmer options. Two are offered with the black aluminum Pure Roll insert, slightly firmer than the traditional insert, or for the firmest feel, golfers can choose from two colors of milled aluminum inserts.

Another fun addition to the MySpider Tour is the ability to use the “Tommy Sightline.” The custom alignment aid design, which was first drawn onto Tommy Fleetwood’s putter by PGA Tour Rep James Holley, is based on the milled sightline on his Spider ZT head. There are five shorter lines on the left and right of a longer central line serving as the traditional short line alignment aid.

See below for the full specifications sheet for MySpider Tour and Tour X:

MySpider Tour

MySpider Tour X

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Equipment

Then and now: Comparing Rory McIlroy’s current setup to his record-breaking 2019 Canadian Open victory

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In Rory McIlroy’s first appearance at the 2019 RBC Canadian Open, he crushed the record books to earn his 16th PGA Tour title in dominating fashion, winning by seven shots over Shane Lowry and Webb Simpson.

McIlroy’s score of 22-under-par 258 is the lowest 72-hole score to date at the Canadian Open, and his closing 61 is also the best final-round score in the history of one of golf’s oldest tournaments. Finally, with his win in 2019, McIlroy became only the sixth player to win the career Triple Crown, adding to his victories at the U.S. Open in 2011 and The Open Championship in 2014, joining Tommy Armour, Walter Hagen, Arnold Palmer, Lee Trevino and Tiger Woods in a coveted list.

So, with that, why not compare his current setup to the clubs he used to break all the records?

Driver

2019: TaylorMade M5 (9 degrees), Shaft: Mitsubishi Tensei CK Pro White 70 TX
2026: TaylorMade Qi4D (9 degrees @8), Shaft: Fujikura Ventus Black 7X (45 5/8 inches)

McIroy led the Tour in Strokes Gained: Off-the-Tee in 2019; he’s doing the same in 2026. Between now and then, McIlroy has switched from the Mitsubishi Tensei CK Pro White 70 TX (a shaft with slightly more feeling in the tip) to the original Fujikura Ventus Black 7X, having just made the change to the heavier version from playing the 60X.

What’s interesting about McIlroy’s 2019 setup is that the weighting on his driver is actually set in the high-draw setting, using the T-Track weighting system, whereas in the Qi4D, he’s currently using a heavily rear-weighted setup. (Two 13-gram weights in the rear and only two 4-gram front weights.)

The TaylorMade M5 driver he played in during his Canadian Open win was the company’s first head that they claimed to design to initially exceed the USGA’s COR limit, and then injected with tuning resin to bring it back in bounds.

Fairway woods

2019: TaylorMade M6 3-wood (15 degrees), Shaft: Mitsubishi Tensei CK Pro White 80 TX; TaylorMade M5 5-wood (19 degrees), Shaft: Mitsubishi Tensei CK Pro White 90 TX
2026: TaylorMade Qi4D 3-wood (15 degrees), Shaft: Fujikura Ventus Black 8X; TaylorMade Qi4D 5-wood (18 degrees), Shaft: Fujikura Ventus Black 9X

The TaylorMade M6 fairway wood that McIlroy was using during the 2019 season is still in the bag of some of the best golfers on Tour in 2026. Just check out Justin Rose’s winning setup from the Farmers Insurance Open earlier this year. This year, though, McIlroy has still been searching for his top-end-of-the-bag setup, having played both the new Qi4D and the Qi10, which he won the Masters with.

The same shaft swap can be seen in the fairway woods as the driver, along with slightly less loft on the 5-wood.

Irons

2019: TaylorMade P750 (4) Buy here, TaylorMade P730 (5-9), Shafts: Project X 7.0
2026: TaylorMade P760 (4), TaylorMade Rors Proto (5-9), Shafts: Project X 7.0

The biggest difference between McIlroy’s custom set and the stock P730s is the groove design. While the P730s were constructed with 14 MX-9 grooves on their milled faces, McIlroy’s proto heads instead use the higher-spinning, 16-groove layout of the TW2 grooves. Other big differences between the sets are that McIlroy’s 7- and 8-irons have thinner toplines, are 1 degree stronger in loft, and are 1/4 inch longer than the original P730 builds.

With McIlroy’s 4-iron, the switch from P750 to P760 sees a transition to a two-piece construction with Speed Foam in it, which allows McIlroy to launch the ball slightly higher, with more workability.

Wedges

2019: TaylorMade Milled Grind (48-09SB), TaylorMade MG Hi-Toe (52-09SB, 56-09SB, 60-LB09), Shafts: Project X Rifle 6.5
2026: TaylorMade MG5 (46-09SB, 50-09SB, 54-11SB, 60-08LB @61), Shafts: Project X 6.5 (46-54), Project X 6.5 Wedge (60)

Between 2019 and 2026, McIlroy’s focus on his short game has been much more apparent. It was the reason why he switched back to the TP5 golf ball, to help with launch, spin and control with his wedges leading up to his career Grand Slam victory in 2025. The most apparent changes to McIlroy’s wedge setup are his lofts and bounce. He’s slowly delofted his pitching to a sand wedge, but has increased the loft on the lob wedge, bending his current 60-degree to 61. With that, adding more loft to his lob wedge also slightly increases the bounce and leading-edge sit point, so, as a result, he plays a lower-bounce lob wedge compared to 2019. The MG5 wedges are also softer than the first Milled Grind option from 2019. McIlroy also no longer plays the full-face grooves found on the Hi-Toe.

Putter

2019: TaylorMade Spider X
2026: TaylorMade Spider Tour X

Notice anything similar. Yes, the copper finish on Rory McIlroy’s Spider X putter in 2019 is a slightly more reflective finish than the recently released torched PVD finish. McIlroy was using the True Path alignment system, but now uses only a single white sightline.

Ball

2019: 2019 TaylorMade TP5 (#22)
2026: 2025 TaylorMade TP5 (RORS)

As mentioned above, McIlroy had transitioned from the TP5 to TP5x golf ball since his victory in Canada in 2019, but now is black with the same style of golf ball as his victory at Hamilton Golf & Country Club.

Grips

2019: Golf Pride Tour Velvet Cord
2026: Golf Pride MCC

Interesting, McIlroy actually used Golf Pride’s Tour Velvet Cord grips during his victory in 2019 (it was during a 2+ year switch to the corded TV) as opposed to his usual MCC grips, which he has played for most of his career.

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