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Thomastik-Infeld Electric Guitar Steel/Nickel Flat Wound Medium Light, .012 - .050, JS112

Thomastik-Infeld Electric Guitar Steel/Nickel Flat Wound Medium Light, .012 - .050, JS112
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18 Reviews
94% (17)
0% (0)
6% (1)
0% (0)
0% (0)
11% Recommend this product (2 of 18 responses)
By BicycleJoe
Bronx NY
Best Crack I ever smoked
December 20, 2020
One riff and I was addicted for life. Is there a 12 step program for these strings?
God you raised the price again.
Oh what can a poor boy do?
I'm gonna have to start a go fund me to put a set of these on every guitar I own.
non better $$$$
By Allan
Ocean View, N.J.
Simply the best
November 8, 2019
The Thomastik swing series are the best flatwound strings I’ve ever used....the nickel wrap, coupled with the round core produces a sweet sounding string that’s extremely playable and possesses perfect intonation in all positions....they’re bright, but also mellow....and yet, very clean sounding and never muddy or dull.....as far as I’m concerned, if you want flatwound strings....these are the best strings, hands down....and no matter which gauge you pick, they’re all good.
By Bruce
Thomastik Swing Flat wounds
January 21, 2018
Have used these TI swing flat wounds interchangeably with the be bop sets over the years on my L-5CES. Both sets are great, with different tonal characteristics. I like and use Pyramid max performance 10-46, 10-48 sets on my ES335 and have tried the Pyramid flat wounds on the L-5; I found the TI flat wounds to be more lively than the Pyramids. BTW, regarding last review, I have never had any breakage issues and BTW, the TI steel strings are available form .008 on up.
By Randy J.
September 12, 2017
These JS-111 and JS-112 strings are absolutely fantastic strings, no doubt, but you'd better be prepared to replace the 011 and 012 (#1, high-e) string every now and again. That's just a cold, hard fact. I've been using them now for nearly twenty-years, on multiple hollow- and semi-hollow bodied guitars, and yes, they play like no other strings, but the breakage at high-e is common and its very-very frustrating. You'll also notice that they don't offer the 011 and 012 Thomastik-Infeld (TI) strings in "singles". Gee, I wonder why that is??!@#%$. When mine break, I have to replace them with D'Addario singles of those same diameters, which are both cheaper and readily available, and unlike the TI's, the D'Addario's come vacuum sealed to protect against humidity and other sources of corrosion. Given these collective facts, I will be sticking with D'Addario flat-wound (Chromes) from here on out. Its simply easier, cheaper and way less stressful.
By Steve T.
GREAT strings !!!
March 20, 2016
I just bought an Ibanez jazz guitar (AFJ95 VSB). It was NOS and according to the serial number, it was actually built 3 years ago --- so the strings were shot. I ordered a couple of sets of these Thomastik-Infeld flatwound strings. It took a few days for them to be shipped, and I thought the guitar sounded pretty good, even with the dead strings. When the strings arrived, I changed them immediately. All I can say is HOLY CRAP !!! These strings are GREAT !!! This guitar retails for about $900 --- with these strings, it sounds like a $10,000 Gibson L5. These will be the strings I use on this guitar for as long as I own it !!! ...and I'll be trying the Thomastik-Infeld acoustic strings on my Martin, as well.
By Max
Perfect on my 2004 Brian Setzer 6120-SSU
July 13, 2015
Just got the guitar and my tech set it up with the TI's. Just unbelievable! What a difference in tone and they work fantastic with the hot wound TV Jones pick ups!
I will buy over and over a gain!
By Johnny B.
Fantastic Strings
August 30, 2014
Replaced the D'addario Chrome flatwounds on my Godin 5th Avenue Jazz with Thomastik-Infeld Swing 12-50's. The Chromes were OK, but the TI Swings are amazing. Deep, rich and very dynamic.
By Rob C.
TI Jazz Swing are Very Fine strings
April 1, 2014
Reviewed on a Yamaha SA2200 (like a Gibson ES 335 with an ebony fretboard).
Strung up and intonated without a hitch.
Hold tuning well.
Very even tone across the fretboard.
The nickle windings give a softer and more sensual feel then stainless steel (Chromes).
The TIs cut out the excess sustain and ringing of round-wounds, while still sounding "alive". There is just enough sustain to give a singing quality, while not clouding fast runs.
Excellent response to subtle changes in fingering or pick material, and attack.
Firm enough for accurate pitch and very low action, but still bendable.
I have always preferred the sound and feel of nickle strings, and am very pleased to have these nickle flat-wounds available. For subtle and/or complex music played without distortion, the TI Jazz Swing strings are my new favorite.
By joe s.
js112 .012-.050
August 31, 2011
Sound great on both my bambino electric and john pisiano archtop.
By Joe N.
TI Flats
January 12, 2011
I've been using these strings for about 10 years. Tried them all and the TI's are the best flatwounds on the market.
By steven
these strings are simply the best
December 27, 2010
I love my guitar, its a carved top Eastman, it sounds so nice but these strings really take things to a new level. I also have them on my Gretsch laminate, and to be honest it is only a five hundred dollar guitar, and with the strings it can hang with the Eastman.
By wc t.
simply the best
September 7, 2010
The absolute best stings to use on any archtop, acoustic or electric. They last, keep their tone and have no string noise. If you have never used flat wounds or you've only used chromes, you must try these. They have their own feel, due to, I guess, the lower string tension. I use 13s on my Triumph and 12s on my 17" electric archtop. The tone is even and mellow. If you want bright these are the wrong strings. They even sound great on a Byrdland.
By Dan
Pure jazz
September 1, 2010
Feel great, sound great, and last forever. (Well, at least for a long time.) Most flatwounds are stainless and, while smooth, have a hard edge to their feel. These are flat wound nickel steel and have a much friendlier feel to them.
By jerry m.
thomastik guitar strings js112
August 30, 2010
These strings are the best on the market for jazz guitarist. The sound is incredible and the strings last along time. The best, Jerry
By Lisa S.
Thomastik-Infeld JS 112 Strings
July 2, 2010
I wasn't sure there could really be this much difference re/ these strings but from the moment I put them on I found them to be superior. They stayed in tune instantly (no stretch out period) and they have a big, bright (but mellow), precise tone that I really like. I'm also hoping they will last a little longer than average strings. I highly recommend these!
By Doug
January 12, 2010
There great strings. Fine tone, flexiblility, and seem to stay in tune well once there on the guitar for a couple of hours.
By Garry E.
Thomastik-Infeld Electric Guitar Steel/Nickel Flat Wound Medium Light, .012 - .050, JS112
November 23, 2009
They're great!
I love them. Will order again!
By Reynaldo A.
Thomastik-Infeld Electric Guitar Flatwounds JS112 strings
August 14, 2009
The best electric flatwound I have tried. Vintage sound. Their sound lasts much longer and gets better. Great feel of the strings - buttery feel with a warm mellow sound. Great for Jazz and even early Rock which what they used at that time. Great Choice of flatwound strings!






1st E

Plain Steel



2nd B

Plain Steel



3rd G

Nickel Flat Wound



4th D

Nickel Flat Wound



5th A

Nickel Flat Wound



6th E

Nickel Flat Wound




Jazz Swing Series - Flat Wound

characteristics: mellow timbre, powerful, designed specifically for semi acoustic and acoustic jazz guitars

"Jazz is a tradition. It takes years to master jazz techniques. The Jazz musician's fine ear senses the slightest variations in tone quality and a full mellow sound is the ultimate of perfection in traditional jazz. Jazz masters are every bit as demanding as classical artists. The JAZZ Swing Series is a professional flatwound string, handmade by highly qualified specialists loyal to the traditions of legendary instrument-makers and performers.



Founded in 1919, one of the world's largest manufacturers of strings for musical instruments has applied 76 years of experience to develop a new generation of strings.


Vienna, music capital of the world


Our strings are handmade by highly qualified specialists. With our extensive quality control via computer and signal processing equipment, we have successfully combined Old World craftsmanship with state of the art technology.


The results of our research and our scientific approach to string manufacturing -- based on cooperation with musicians and scientists -- have led to the creation of a new line of guitar strings that is exactly what professionals are calling for.


Guitar strings for creative musicians.

THOMASTIC-INFELD is the best kept secret in the music industry. Did you know that for decades most of the great jazz and classical guitar players have chosen THOMASTIK-INFELD strings? Old World quality and experience, combined with the most advanced modern technology available, give you creative tools to meet the highest standards of performance. Perhaps the time has come for you to discover what a chosen few have know for years? THOMASTIK-INFELD cares about the needs of professionals and amateurs. Worldwide."


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