Asuka Racket Stringing Studio

Simply legendary. Thank you for an incredible career, 🇩🇰 Viktor Axelsen. 🫡

Read more 👉 https://bit.ly/42aVN1W

Recently, I’ve had a few customers come in after purchasing some secondhand rackets from Facebook Marketplace. And unfortunately, some turned out to be counterfeit Yonex rackets.
It sucks seeing people get burned like that, so I have decided to make a post about how to authenticate genuine Yonex rackets. (I might make separate posts in the future talking about how to authenticate Victor's and Lining's rackets!)

Things to look for before buying a Yonex racket:

1. Check for the Yonex hologram authentication sticker

Genuine Yonex rackets usually come with a proper hologram authentication sticker. Fakes often either don’t have one, or the quality looks off (blurry, peeling, or poorly aligned).

2. Check the serial number on the shaft and cone cap

Each genuine Yonex racket has a unique serial number engraved cleanly into the shaft and cone cap. If the engraving appears inconsistent, painted, or carved rather than laser-etched, it raises a warning.

3. Check the serial code format

This one is a bit tricky! Older Yonex rackets had region codes (SP, JP, US, CH etc.), but newer models (2021-current) no longer use them. Yonex has changed its coding system, and region codes are no longer included at the end. If you see a “new” Yonex racket with a region code, be cautious.

4. Overall build quality of the racket

Look closely at the paint, decals, and finishing of the overall racket. Yonex quality control is very consistent, especially on the Pro and Tour models. If you see uneven paint, crooked logos, cheap-feeling materials, or unsymmetrical shapes and designs, they are major warning signs!

5. Manufacturer sticker on the handle

With genuine Yonex rackets, you will be able to find 2 Yonex manufacturer stickers on the handle after removing the under grip. One sticker should have the model, specs, and serial code, while the other is a barcode.

6. Extremely cheap pricing

Lastly… pricing!!! Especially when buying second-hand, if the listing price is significantly lower than the market value, you should be very cautious proceeding with the deal. Because when a deal looks too good to be true, it usually is.

If you’re ever unsure, feel free to reach out or bring it in! I’d rather help you double-check. Don’t let untrustworthy sellers scam you out of your hard-earned money 💸💸💸

Updated Feb 25, 2026

***************************NOTICE***********************************
We sincerely apologize for the upcoming price adjustment on Yonex strings starting February 25, 2026.

Due to increased manufacturing costs, Yonex has raised their string prices by approximately 30% over the past year. As a result, we will need to adjust our pricing accordingly.

We truly appreciate your understanding and continued support. Thank you for trusting us with your equipment, and we apologize for any inconvenience this may cause!
**********************************************************************

FOLLOW OUR FACEBOOK PAGE "Asuka Racket Stringing Studio" FOR MORE INFO!!!

Badminton racket stringing with Haribito or Yonex 2-piece stringing methods

**PRICE IS FIXED AND FAIR, ANY BARGAINING, PRICE NEGOTIATION, OR ASKING FOR DISCOUNT WILL BE IGNORED**
• Labour (Bring Your Own String): $18
• Express/Rush Service: +$10 (depending on workload and requires 2 hours' advance notice)
• Full Grommet Replacement (applies for bring-your-own grommets as well): $15 / racket
• Regrip (Synthetic Overgrip): $3
• Stencil Logo (Yonex/Victor/Li-Ning/Lin Dan): $2

String Options (prices including labour)
●Yonex BG65 (white, blue) - $26
●Yonex BG 65Ti (white, pink) - $27
●Yonex BG80 (white, yellow) - $28
●Yonex Aerobite (white & red) $32
●Yonex BG66 Ultimax (white) - $32
●Victor VBS66N (sky blue) - $28
●Lining N65 (white) - $30
●Kizuna Z65 Premium (yellow) - $28*
●Kizuna Z66 L***y (yellow) - $28*
FOLLOW OUR FACEBOOK PAGE "Asuka Racket Stringing Studio" FOR MORE INFO!!!

Pan Am Championships: Canada Unshaken Atop Perch Canada retained their men’s and women’s team titles at the Pan Am M&F Cup 2026 beating USA in both finals in Guatemala City on Sunday. It was Canada’s depth in women’s singles that helped them edge USA 3-2 in a hard-fought tie. Much hinged on the opening contest between familiar rivals Miche...

Mikhail Bilenki 🇨🇦 proves that age is just a number. 🤗

Read more 👉 https://bit.ly/4c45S7h

An In-Depth Interpretation of Badminton String Tension Loss
Revealing the Truth Behind DT Values Across the Three Major Brands’ strings (a really deep and nerdy topic :D)

This article focuses solely on hardware performance trends. Ultimately, the stringer’s skill, choices of method and understanding are what matter most.

※ Most of the data referenced in this article is compiled from professional stringer communities, major badminton forums, and the collective experience of senior players and technicians. These insights are combined with the author’s own observations and long-term testing using the ERT300 Plus Dynamic Tension Tester. Based on years of trials and testing, the data has been systematically interpreted and organized. The figures presented are not absolute values but rather trend-based references intended for stringers and players. Please read with a rational and analytical mindset.

What Are “Tension Loss” and “DT Value”?
Before discussing tension loss, several key concepts must be understood first.

Traditionally, stringing tension is expressed in pounds or kilograms (lbs/kg, which will be referred to as static tension), which is the reference tension applied during stringing. However, this value represents only static tension.

Once the racket is removed from the stringing machine, tension immediately begins to decrease over time and through actual play. This process is known as tension loss.

To more accurately describe how the string bed behaves during play, tools such as the ERT300 Plus can be used to measure Dynamic Tension (DT value).

DT value represents the perceived stiffness, rebound and vibration response of the string bed at impact (also known as feedback). This can be considered a quantified indicator of string bed elasticity and hitting feel.

Tension Loss Is Not Linear: The First 24 Hours Matter Most (Fig. 2)
Based on real-world testing, most badminton strings begin losing tension immediately after being removed from the machine.
The first 24 hours represent the most significant drop.

Across mainstream badminton strings, DT value loss during this period typically ranges from 5% to 12%, depending on the strings’ material stability, elasticity, and gauge thickness. For recreational players who do not play as often, we do recommend allowing the racket to rest for 24 hours before play. This helps the string bed reach a more stable phase, resulting in a more consistent and longer-lasting hitting feel.

Data on Tension Loss Trends Across the Three Major Brands
Based on collected test data, the following summarizes the average 24-hour tension loss trends of major string models from YONEX, VICTOR, and LINING, highlighting strings with relatively strong tension retention.

1. YONEX
YONEX dominates both the professional and consumer markets, continuously introducing new string technologies.
However, certain thin gauge strings under 0.68mm and hybrid strings exhibit faster tension loss due to their designs.

Higher tension loss (8–11%):
AEROSONIC, AEROBITE series, BG66 ULTIMAX
Better tension retention (4.8–6%):
EXBOLT 63/65/68, BG66 FORCE, BG80 series, SKYARC
Thicker durability strings such as BG65 and BG65Ti show moderate loss (~7.7–7.8%), but offer excellent stability and remain classic durability choices.

Overall observation:
YONEX tension retention is closely tied to string gauge and how the string is being constructed itself. Thin strings provide superior repulsion but reduced stability, while thicker strings and the EXBOLT series perform notably better in retention.

2. VICTOR
VICTOR strings have made significant progress in recent years, particularly excelling in tension retention, especially for mid-to-high tension competitive setups.

Exceptionally low-tension loss:
VBS70 (3.8%), VBS68P (4.3%), VBS63 (5.7%), VBS69N (5.8%)
Thin strings still within acceptable range:
VBS58 (6.8%), VBS61 (6.2%)
VBS66N, designed for elasticity and feel, shows higher loss (~7.4%).

Overall observation:
VICTOR strings clearly show a trend of thicker gauge = better tension retention, while maintaining solid stability across different performance categories.

3. LINING
LINING focuses heavily on combining high repulsion with durability, offering a wide variety of string options.
Tension retention varies significantly by model.

Strong tension retention:
N70 (3.8%), N65, N68 (5.7%), N58, N61, L67 (~6%)
Higher tension loss:
NO.1, NO.5, NO.7 (9–10.7%), N65, N69 (9.4–9.6%)

Notably, while the NO. series (the older generation lineup) delivers excellent elasticity and an explosive feel, it sacrifices tension retention, making it more suitable for players who restring frequently or prioritize immediate feedback. The new N series, however, represents a clear improvement over its predecessor, reflecting advancements in LINING’s string technology with noticeably better tension stability while providing excellent overall balance and repulsion performance.

Why Do Professional Players Prefer Freshly Strung Rackets?

While recreational players benefit from letting strings stabilize, this advice generally does not apply to professional athletes.
Key reasons include:

• Peak Performance
Freshly strung rackets retain peak tension, offering maximum repulsion and control, which is critical in fast, high-intensity rallies.

• Feel Consistency
Elite players are extremely sensitive to string bed feedback. Even minor tension changes can affect timing, confidence, and shot quality.

• Equipment Consistency
Professionals standardize their tension, string model, stringing pattern, and pre-stretch percentage, which are to ensure identical racket behavior and feel in every match.

Why Do Professionals Restring Every Day During Tournaments?

This practice directly follows the principles above:
• Maintaining consistent tension!
Even without play, strings can lose 5–10% DT within 24 hours.

• Environmental adaptation!
Temperature and humidity significantly affect string behavior. New strings help counteract these variables.

• Reducing breakage risk!
Match intensity far exceeds training. Using fatigued strings increases the risk of in-match breakage.

• Strategic adjustments!
Some players fine-tune tension or string type based on opponents, court speed, or match conditions.

In conclusion… Understanding Tension Loss Is the First Step Toward Finding the Ideal Tension😊

Whether you’re a beginner, a feel-oriented advanced player, or an aspiring competitor, understanding tension loss and DT value behavior is essential for making informed choices to select the right equipment for yourself!

Choosing a string with stable tension retention, pairing it with appropriate static tension, and monitoring DT changes based on swing speed and play frequency are the keys to long-term consistency and confidence.

Consulting stringers for fine adjustments is always strongly recommended!

The true value of a professional stringer lies in bridging the gap between “unfamiliar” and “perfectly dialed-in.”