Best Thick Tennis Strings: 16 Gauge Options Compared

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Thicker tennis strings can be a good fit if you want a sturdier setup or tend to break thinner strings. The options below are all 16 gauge or close to it, but they differ in material and playing character: synthetic gut offers a straightforward choice, polyester is aimed at spin and durability, and natural gut prioritizes feel and elasticity. Use the comparison and guide to find the right balance for your game.

Our Picks: Best Thick Tennis Strings reviews

Wilson Synthetic Gut Power: A Simple 16-Gauge Set

Wilson Synthetic Gut Power is a single 40-foot set in 16 gauge. Its straightforward format makes it a practical option if you want a thicker synthetic-gut string without buying a reel or trying a more specialized material.

The 16-gauge size puts it in the thicker end of common tennis-string choices. That can be appealing if you want a sturdier string bed than a thinner gauge provides. The product name highlights power, but your actual response will also depend on your racket, tension, and swing.

This set is a reasonable match for players who want a basic replacement string and prefer to make their own tension choices with a stringer. The supplied listing does not provide much detail beyond the gauge, length, color, and synthetic-gut type, so there is less product-specific information here than with some of the other picks.

Pros:

• 16-gauge option for a thicker string bed
• 40-foot set for a standard restringing job
• Synthetic-gut construction keeps the choice straightforward

Cons:

• The supplied product details offer limited construction information
• Availability may vary by listing

Verdict: Choose Wilson Synthetic Gut Power if you want a simple 16-gauge set and do not need a reel or a specialty string design.

Kirschbaum Synthetic Gut Reel: A Practical Supply for Frequent Stringing

This Kirschbaum string is a 1.30 mm, 16-gauge synthetic gut supplied in reel format. A reel is designed for people who restring often, so you can keep string on hand for more than one restringing session instead of buying separate sets each time.

The product description highlights its synthetic construction and compatibility with hybrid setups using Kirschbaum polyester. That makes it a flexible option if you want to combine string types in one racket. The natural color keeps the appearance understated, while the 1.30 mm thickness places it firmly among the thicker choices here.

Compared with a 40-foot set, the reel makes more sense when you expect to use the same string repeatedly. It is a less compelling fit if you are only restringing once or still figuring out which string suits your game. The supplied details do not specify the reel’s total length, so check the listing before buying if that is important to your decision.

Pros:

• Clearly specified 1.30 mm / 16-gauge thickness
• Reel format suits frequent restringing
• Described as compatible with Kirschbaum polyester in hybrid setups
• Natural color works for a simple, low-key look

Cons:

• A reel may be more string than an occasional stringer needs
• The supplied description does not state the reel length

Verdict: Pick the Kirschbaum reel if you string regularly or want a synthetic-gut option for a planned hybrid setup.

HEAD Synthetic Gut: A 16-Gauge Nylon Set with Color Choices

HEAD Synthetic Gut is a 40-foot set made from solid-core nylon. It comes in 16 gauge, listed as 1.30 mm, and is described as a thicker option for added durability. The set length is standard for most adult tennis rackets.

One helpful feature is the range of listed color choices: gold, black, blue, pink, white, and yellow. The featured product is pink, so check the selected option before ordering if you have a particular color in mind. Its nylon construction and single-set format make it a direct alternative to the Wilson set, with more detail provided about the material and available colors.

This is a sensible choice if you want a familiar synthetic-gut format and a specific color for your racket. It does not offer the reel convenience of Kirschbaum or the distinct material profile of natural gut and polyester, so it is best viewed as an uncomplicated set rather than a specialty pick.

Pros:

• 1.30 mm / 16-gauge thickness is clearly stated
• 40-foot length suits most adult racket restringing jobs
• Solid-core nylon construction is specified
• Multiple color options are listed

Cons:

• Single-set format is less suited to frequent restringing
• Color availability may depend on the selected listing option

Verdict: Choose HEAD Synthetic Gut if you want a clearly specified 16-gauge nylon set and like having several color options.

Babolat Touch VS: Natural Gut for Feel and Tension Hold

Babolat Touch VS is a 16-gauge natural-gut set with a listed length of 39 feet. Unlike the synthetic-gut and polyester options in this guide, it is made from natural fibers. Babolat describes its elasticity as a source of power and feel, and highlights its ability to hold tension over time.

The product description also notes that the string can be used in a hybrid setup. That gives you the option to combine natural gut with another string type, rather than using it across the full racket bed. Its listed 16-gauge thickness fits this roundup, though the product details do not give a millimeter measurement.

Natural gut is the standout choice here for players who put feel, comfort, and tension stability ahead of choosing a simple synthetic set. It is also a different kind of purchase from the other picks: it is a premium material, so consider whether its stated benefits matter to your game before choosing it over nylon or polyester.

Pros:

• Natural-gut construction is clearly identified
• 16-gauge set with 39-foot length
• Designed to provide elasticity, feel, and tension hold
• Can be used in a hybrid setup

Cons:

• Does not provide a millimeter measurement in the supplied details
• May be more specialized than a player seeking a basic synthetic-gut set needs

Verdict: Choose Babolat Touch VS if natural-gut feel and tension hold matter more to you than choosing a straightforward nylon or polyester string.

Dunlop Black Widow: A Thick Polyester String with a Spin-Focused Shape

Dunlop Black Widow is a 40-foot set of monofilament polyester string. Its 1.33 mm thickness makes it the thickest option in this comparison by the stated measurements. Dunlop describes its heptagonal profile as helping the string bite into the ball for spin, and its high-tensile construction is intended for durability.

This design sets it apart from the rounder, general-purpose synthetic-gut choices. It is best suited to players who want a polyester string and are interested in the spin-focused shape described by the manufacturer. The product description also presents it as offering power and control, but how that feels in your racket will depend on your setup and playing style.

Polyester is not automatically the right choice just because you want a thick string. If your main priority is natural-gut feel or an uncomplicated synthetic-gut option, Babolat, HEAD, Wilson, or Kirschbaum may be a closer match. Dunlop is the more specialized pick for a player who specifically wants its shaped polyester design.

Pros:

• 1.33 mm / 16-gauge thickness is the largest stated measurement here
• Heptagonal profile is designed for spin generation
• Monofilament polyester construction is identified
• 40-foot set is suitable for a standard restringing job

Cons:

• Its polyester design is more specialized than a basic synthetic-gut set
• Players seeking natural-gut construction or feel should consider another option

Verdict: Choose Dunlop Black Widow if you want a thick polyester string with a shaped profile intended to support spin.

How to Choose Thick Tennis Strings

Understand what gauge tells you

Gauge refers to string thickness. These picks are labeled 16 gauge, with the HEAD and Kirschbaum options listed at 1.30 mm and Dunlop at 1.33 mm. Thicker strings are often chosen for a sturdier setup, but gauge alone does not determine how a string will feel or play. Material, string shape, tension, and your racket all matter too.

Choose the material that fits your priorities

Synthetic gut is a sensible place to start if you want a general-purpose string in a single set. The HEAD and Kirschbaum listings specify solid-core nylon and synthetic construction, respectively. Polyester, such as Dunlop Black Widow, has a different design focus, with a shaped profile described for spin. Natural gut, represented by Babolat Touch VS, is the choice in this group that emphasizes elasticity, feel, and tension hold.

Pick a set or reel based on how often you restring

A 40-foot set is a convenient format for a single restringing job; the HEAD and Dunlop listings state this length, while Wilson is also sold as a 40-foot set. Babolat lists a 39-foot set. Kirschbaum comes as a reel, which is intended for frequent stringers. Since its supplied product details do not state the reel length, check the listing if you need to know how much string it contains.

Consider whether you want a full bed or a hybrid

A full bed uses the same string throughout the racket, while a hybrid setup combines two types. The Kirschbaum description specifically notes compatibility with Kirschbaum polyester in hybrids, and Babolat says Touch VS can be mixed with another string. If you are new to hybrids, ask your stringer which combination and tension suit your racket and playing style.

Match the string to your playing style

Think about what you want to change or preserve in your setup. If you want a basic synthetic-gut option, consider Wilson, HEAD, or Kirschbaum. If the shaped profile and spin focus appeal to you, look at Dunlop. If natural-gut feel and tension hold are high priorities, Babolat is the distinctive choice. Product descriptions can help narrow the options, but your own racket and preferences remain important.

Check the details before ordering

Confirm the selected gauge, length, color, and format on the product listing. This matters especially for products with color choices, like HEAD, or when deciding between a single set and a reel. A stringer can also confirm the correct length and tension for your racket before installation.

Frequently Asked Questions

Are 16-gauge tennis strings thick?

Yes. A 16-gauge string is generally considered a thicker option than finer gauges. In this roundup, the listed measurements range from 1.30 mm to 1.33 mm where a millimeter size is provided.

Do thicker tennis strings last longer?

Thickness can be one factor in how long a string lasts, but durability also depends on the string material, your swing, and how often you play. A thicker gauge is not a guarantee that a string will last longer for every player.

Which string here is the thickest?

Dunlop Black Widow has the largest stated measurement in this group at 1.33 mm. The other products with millimeter measurements are listed at 1.30 mm.

Which option is best for a first-time string buyer?

HEAD or Wilson can be straightforward starting points if you want a single synthetic-gut set. HEAD provides more detail about its solid-core nylon construction and color options, while Wilson is a simple 16-gauge set. Choose based on the details and color you prefer.

Can I use natural gut in a hybrid setup?

Yes. The Babolat Touch VS product details say it can be mixed with another string in a hybrid setup. Ask your stringer to help select the other string and tension for your racket.

Should I choose a reel or a 40-foot set?

A reel is intended for people who restring frequently, while a single set is more convenient for an occasional restring. The Kirschbaum product is listed as a reel; several other choices are sold as 39- or 40-foot sets.

Final Recommendation

For a straightforward thick synthetic-gut set, HEAD Synthetic Gut is a strong place to start because its 1.30 mm gauge, solid-core nylon construction, and 40-foot length are clearly listed. Choose Kirschbaum if you restring often or plan a hybrid setup, Dunlop Black Widow if you want a shaped polyester string aimed at spin, and Babolat Touch VS if natural-gut feel and tension hold are your priorities. Before ordering, confirm the selected gauge and format, then ask your stringer about a suitable tension for your racket.