Changelog

Site updates

A dated record of new guides, browser tools, public data reviews and corrections on String Tension AI, newest first. Each entry links to the page that changed.

  • Data

    Five Yonex frames added; Yonex rows now document their spec-table source

    Added the Yonex EZONE 98 Tour, EZONE 105, VCORE 95, PERCEPT 97D and ASTREL 105, each quoted from the “Stringing Advice” row of the model’s specification table on us.yonex.com. Most Yonex frames from 95 to 100 sq in print 45–60 lbs there, while the EZONE 105 and ASTREL 105 print 40–55 lbs, which shows the row is set per model rather than copied across the store. Every Yonex row now notes that source, and the six existing Yonex rows were re-checked against their pages with no change. The table now lists 104 frames from nine brands.

  • Data

    Wilson frames restored from Wilson’s stringing sheets

    Added 26 current Wilson frames (Blade v10, Clash v3, Ultra v5, Shift v1, Pro Staff v14 97 and 97L, and Pro Staff 97 and 97L Classic). Each range is quoted from the recommended string tension on the stringing-instruction sheet Wilson links from its stringing-instructions page, and each head size from a Wilson product page named in the row; the store stringing-service sentence behind the earlier rows is not used. Four frames with a sheet but no Wilson page stating head size are left out. Where Tennis Warehouse lists a range for the frame, the row’s source details also show it as a retailer-listed figure for context; it is not a manufacturer specification and the calculator and saved log never use it. The table listed 99 frames from nine brands after this addition.

  • Correction

    Wilson rows removed from the racquet tension ranges

    We removed all 17 Wilson frames. Their quoted range, “Tension range 50 to 60 pounds, optimum 55 pounds”, came from the stringing-service add-on on Wilson’s New Zealand and Australian web stores, which shows the same sentence on every stringable frame. It is not a per-frame Wilson specification, so the rows did not meet the table’s rule and were removed pending a Wilson-published source (restored the same day from Wilson’s stringing-instruction sheets, see the entry above). The table listed 73 frames from eight brands after the removal.

  • Data

    Racquet String Tension Ranges: 19 HEAD frames added

    Added 19 HEAD frames: Speed Pro, Tour, MP, MP L and Team 2026; Radical Pro, MP and Team 2025; Gravity Pro, MP and Team 2025; Extreme Pro and MP 2026; Boom Pro, MP and Team 2026; and Prestige Pro, Tour and MP L 2023. HEAD’s product pages give head size and pattern but no tension range, so each range is quoted from the stringing-instruction PDF linked on the product page, and each row links that sheet. Frames whose sheet printed kg and lbs figures that disagree, or belonged to a different model, are left out.

  • Data

    Pro string setups reconciled with manufacturer kits

    Five catalog rows now follow the manufacturer pages behind their profiles. Ben Shelton’s strings change from POLYTOUR STRIKE 1.30 to POLYTOUR REV and POLYTOUR PRO 1.25, and the older tension tied to the STRIKE setup is removed. Casper Ruud’s POLYTOUR PRO cross is now 1.30 mm. Racquet records change to the EZONE 100 for Ruud, VCORE 100 for Elena Rybakina, Yonex EZONE 98 for Madison Keys and T-FIGHT 305S for Daniil Medvedev, with model weights labelled as retail specifications.

  • Data

    Racquet String Tension Ranges: 16 Babolat frames added

    Added 16 Babolat frames (Pure Aero+, Lite and S Lite Gen9; Pure Drive+, 107, Lite and S Lite Gen11; Pure Strike 97, 98 18x20, 100 16x20, Team and Lite Gen4; Evo Drive, Evo Drive Tour, Evo Aero and Evo Aero Lite Gen2), each quoted from Babolat’s own product page.

  • Guide

    String Tension, Temperature and Climate

    A new guide to what heat, cold, a hot car, altitude, ball type and humidity change about the stringbed, with a seasonal helper that suggests an adjustment band to test and a checklist for measuring under similar conditions. Reviewed twice a year, in spring and autumn.

  • Guide

    Frances Tiafoe String Tension & Setup

    A source-based profile of what Yonex lists for Frances Tiafoe: the Yonex PERCEPT 97 racquet and Yonex POLYTOUR PRO 125 string. No tension is published, so none is shown. The page compares the listing with our catalog row and closes with what it means for a club player.

  • Guide

    Daniil Medvedev String Tension & Setup

    A source-based profile of what Tecnifibre lists for Daniil Medvedev: the Tecnifibre T-FIGHT 305S racquet and Tecnifibre RAZOR SOFT (White) string. No tension is published, so none is shown. The page compares the listing with our catalog row and closes with what it means for a club player.

  • Guide

    Arthur Fils String Tension & Setup

    A source-based profile of what Babolat lists for Arthur Fils: the Babolat Pure Aero 98 racquet and Babolat RPM Blast string. No tension is published, so none is shown. The page compares the listing with our catalog row and closes with what it means for a club player.

  • Guide

    Madison Keys String Tension & Setup

    A source-based profile of what Yonex lists for Madison Keys: the Yonex EZONE 98 racquet and Yonex POLYTOUR REV 125 string. No tension is published, so none is shown. The page compares the listing with our catalog row and closes with what it means for a club player.

  • Guide

    Emma Navarro String Tension & Setup

    A source-based profile of what Yonex lists for Emma Navarro: the Yonex VCORE 98 racquet and Yonex POLYTOUR REV 125 string. No tension is published, so none is shown. The page compares the listing with our catalog row and closes with what it means for a club player.

  • Guide

    Jasmine Paolini String Tension & Setup

    A source-based profile of what Yonex lists for Jasmine Paolini: the Yonex VCORE 100 racquet and Yonex POLYTOUR PRO 120 string. No tension is published, so none is shown. The page compares the listing with our catalog row and closes with what it means for a club player.

  • Guide

    Pro setup profiles: what this means for a club player

    Every pro string setup profile now ends with a club-player section: the published starting range for the profile’s string construction, how a displayed pro reference setting compares with it, and the steps to find your own range and baseline.

  • Guide

    Casper Ruud String Tension & Setup

    A source-based profile of what Yonex lists for Casper Ruud: the Yonex EZONE 100 racquet and two strings, Yonex POLYTOUR SPIN 125 and Yonex POLYTOUR PRO 130. No tension is published, so none is shown. The page compares the listing with our catalog row and closes with what it means for a club player.

  • Guide

    Ben Shelton String Tension & Setup

    A source-based profile of what Yonex lists for Ben Shelton: the Yonex EZONE 98 racquet and two strings, Yonex POLYTOUR REV 125 and Yonex POLYTOUR PRO 125. No tension is published, so none is shown. The page compares the listing with our catalog row and closes with what it means for a club player.

  • Guide

    Elena Rybakina String Tension & Setup

    A source-based profile of what Yonex lists for Elena Rybakina: the Yonex VCORE 100 racquet and Yonex POLYTOUR FIRE 125 string. No tension is published, so none is shown. The page compares the listing with our catalog row and closes with what it means for a club player.

  • Guide

    Diana Shnaider String Tension & Setup

    A source-based profile of what Yonex lists for Diana Shnaider: the Yonex EZONE 100+ racquet and Yonex POLYTOUR FIRE 125 string. No tension is published, so none is shown. The page compares the listing with our catalog row and closes with what it means for a club player.

  • Data

    Tennis String Database

    A searchable table of manufacturer-published specifications for 120 strings from 13 brands: material, construction, shape, coating, gauges in millimetres and published tension guidance, each with its source. String names in the pro setups table now link to their rows.

  • Tool

    Tennis String Setup Finder

    Five questions to a starting setup to test: a reference tension range inside your racquet’s limits, a string construction to try, a restring window and a monthly cost, with a share link, a calendar reminder and a printable stringer card.

  • Guide

    Tennis String Tension for Arm Comfort

    A new guide to what tension, string material, gauge and frame stiffness change about impact shock, with the evidence class for each claim and the laboratory finding on string dampeners. Equipment guidance, not medical advice.

  • Data

    Racquet String Tension Ranges

    A searchable table of manufacturer-published tension ranges for 104 current racquets from nine brands, each quoted from the maker’s own page, with a link that opens the tension calculator with the range filled in.

  • Guide

    Tennis String Types Explained

    A new guide to how polyester, synthetic gut, multifilament, natural gut and hybrid strings are built, how each holds tension in laboratory tests, and where each starting range sits.

  • Guide

    Tennis String Gauge Guide

    Gauge numbers in millimetres from the ITF table, what thinner and thicker strings change, and what the evidence says about gauge and spin.

  • Guide

    String Pattern and Tension

    How open and dense patterns and head size change stringbed stiffness and spin, and why each racquet should be compared with its own baseline.

  • Tool

    My Stringbed Log

    A private browser log for racquets, string setups and tension readings, with baseline comparison, a trend chart and CSV export. The calculators can fill in from it and save to it; nothing is sent to us.

  • Guide

    How to Talk to Your Stringer

    A new guide to briefing a stringer: reference tension versus stringbed tension, what to ask for, and what a stringing receipt should record.

  • Guide

    Tennis Stringing Glossary

    Two-sentence definitions of 38 stringing and tension terms, each with its own link and a pointer to the guide that covers it in depth.

  • Tool

    Copy a link to your calculator values

    The tension, restring, tension-loss, checker, cost-tracker, control and spin calculators can copy a link that reopens them with the same values. The values travel in the link’s address.

  • Tool

    Restring calendar reminders

    The restring calculator and string cost tracker can create a calendar file with an estimated restring date and a mid-life tension check, or copy the dates as text.

  • Tool

    Printable stringer handoff card

    The hybrid guide now has a fillable card for racquet, mains and crosses, gauges, reference tensions, prestretch and notes that prints on its own.

  • Data

    Verification dates shown with the data

    The pro string-setup page and the tension calculator now show when their data was last verified or reviewed, read from the published JSON files.

  • Data

    Tension guidance reviewed

    The construction ranges and sources behind the tension calculator and chart were last reviewed against the published manufacturer and ITF guidance.

For how we classify sources, date records and handle corrections, see our editorial standards. The full guide and tool library is on the resources page.