ReString Mailbag August 2025

Here are the top 5 questions from you, our amazing community, this month.

Plus our in-depth responses to provide you the most value possible.

Question 1 - Tecnifibre NRG Durable Alternative

Hi, my wife likes the Tecnifibre NRG 17 string but it doesn't last. Which string do you have that is most like it? Thanks. Peter.

ReString Response

Hi Peter,

Thanks for reaching out!

If your wife likes Tecnifibre NRG 17 but wants something that lasts longer, we’d recommend trying Sync. It’s our softest and most comfortable poly but that being said it's still a poly which is an entirely different material to the multi your wife enjoys.

Naturally, even with an extremely soft poly, it'll still be stiffer than your NRG. If your wife is up to try a poly, Sync is a great start!

Try stringing it a few lbs lower than her existing set up (if she strings at 53, try 3 to 4 lbs lower). If she feels that a poly is too stiff and different to what she's used to, my personal favorite from another brand is Diadem Evolution.

I've been using that as my favorite multi for years even long before starting ReString!

Question 2 - Sync 17G vs 18G Softness

Initial Question

I loved Restring Sync 17g as a cross (Toroline O-Toro main) strung at 57/54, but I immediately had arm and shoulder issues.

Is Sync 18g any easier on the arm, and any suggestions on the tension to string it to be more arm friendly?

I string the O-Toro pretty high, because it loses about 10 lbs of tension after a few hours.

Initial Response

Hey Brian!

Really appreciate you reaching out and glad to hear you loved Sync 17g as a cross. Sorry to hear about the arm and shoulder issues though, that’s never fun 🙏😣

Switching to Sync 18g could definitely be a step in the right direction. It's a bit softer than the 17g, so it should be a little easier on the arm while still giving you that nice feel and performance in a hybrid.

Also, if you’re open to testing something new, you could try swapping O-Toro for our string Zero in the mains. Zero holds tension really well (which sounds like it could help given what you mentioned about tension drop), and still gives you great spin and control.

Zero + Sync is actually our most popular hybrid setup right now, and a lot of players have found it to be both responsive and more forgiving on the arm.

For tension, you could drop the Sync cross to somewhere in the 52–54 lb range. That should help ease some of the impact without giving up too much control.

Let us know if you'd be interested in giving Zero or Sync 18g a shot, happy to help you dial things in!

Followup Question

Thanks for the suggestion! I'll give Zero and 18g Sync a try.

What do you think of Zero at 54 and 18g Sync at 50, to get a similar feel to what I had with O-Toro / Sync 17g at 57/54, with Sync lower to reduce the risk of arm pain?

Followup Response

Sounds like a great plan! 🎾

Zero at 54 and Sync 18g at 50 is a solid setup. That drop in tension on both strings should help soften the overall feel while still keeping the crisp response and spin you’re used to from O-Toro/Sync at 57/54.

Going with Sync 18g will naturally offer a bit more comfort too, so pairing that with a lower cross tension is a smart move, especially if you're looking to minimize arm strain.

Let us know how it feels once you hit with it!

Question 3 - Zero and Sync in Nordicdots 100

Hi, I received my Limited Custom Box (Restring Zero and Sync) last month, and I recently purchased the Nordicdots 100 racquet.

Could you please recommend the appropriate tension for this racquet?

Kind regards, Thomas

ReString Response

Hi Thomas,

Thanks for reaching out! It's great to hear you're enjoying your Custom Box, and the Nordicdots 100 is an excellent choice of racquet.

Regarding tension recommendations, I'd first suggest going with a tension that you typically use for a full bed of polyester strings. This approach will allow you to make the most direct comparison to your usual setup and then you can adjust from there.

However, if you're looking for my personal recommendation for the Nordicdots, I would suggest stringing the mains at 52 lbs and the crosses at 50 lbs.

I would definitely advise placing the shaped string (Zero) in the mains for enhanced bite and the round string (Sync) in the crosses for really slick snapback.

Please let me know if you have any other questions.

Question 4 - Duffel Bag for Pickleball

I play a lot of pickleball and was curious if the ReString Duffel is big enough to carry multiple paddles, shoes, and a change of clothes. Or is it mainly meant just for tennis?

ReString Response

Absolutely! While we designed the Duffel with tennis in mind, we’ve seen players using it across sports.

The ReString Duffle fits pickleball paddles perfectly, and there’s enough space for shoes, clothes, and gear. Think of it as a versatile all-sport bag, not just tennis-specific.

Question 5 - Shaped String in the Mains

Why do you recommend shaped strings in the mains for a hybrid setup, vs in the crosses?

ReString Response

Great question! The reason we usually recommend shaped strings in the mains comes down to how the strings interact during ball contact.

The mains dominate the stringbed's feel. They're the strings that move the most and snap back to create spin, so putting a shaped string there maximizes bite on the ball.

Crosses act more like support. They mainly influence tension maintenance, feel, and comfort rather than generating spin. That's why smooth, slick strings (like Sync) often do best in the crosses - they let the mains move freely.

That said, there's no "wrong" setup - if someone likes the feel of a shaped cross for extra grab, it's worth experimenting. But for performance and arm-friendliness, shaped in mains + slick round in crosses tends to be the sweet spot.

Got Your Own Question?

We’d love to hear from you and share the best response we can to help your game.

If you have your own question, you can submit that via our contact page.

Until next month, enjoy your tennis!

About the Author: Juan is the co-founder of ReString. He was born in Argentina, raised in Japan, and moved to the US to pursue college tennis. He now plays as an ATP & WTA hitting partner.