Níquel Puro Pure Nickel

This is my new favorite thing. I’m exploring this pure metal wrap and thoroughly enjoying it. As a string maker, pure nickel is a joy to make for its feel, weight, and strength.

Pure nickel (99.96% Ni) has a 50% higher density weight than nickel plated steel (8% Ni)

Pure Nickel also costs about 4-5 times more than nickel steel.

I procure my wrap wire from a single source and all wire is first drawn and of the highest quality.

Pure Nickel will produce a stronger signal

A pure metal wrap wire, as opposed to a plated wire, produces richer harmonics and well articulated overtones as well as fundamental

Nickel is durable, but will mellow with extended use/over time. This is where pure nickel tends to sit for the majority of its lifespan. The signal is not weakened in any way, only the higher frequencies are rolled off in the basses.

Pure Nickel versions of the entire electric guitar line will be posted in the website once they are ready for duplication




The twist at the ball end is extremely crucial to the performance of the string. I’ve adapted longer and hardware appropriate twists to my matrix of formulations.

I promise to have all the pages updated to reflect the options in NIckel Steel and Pure Nickel very soon.. These pages will include my recommendations for pairing your guitar with the right set of strings.

STD – For most through body builds including strats, also for use with stop bar/tuneamatic setups (approx. 1.125” twist)

SHORT – For top loading Tele’s, stop bar bridges (LP jr’s, Coronets, etc) (approx. .5” twist)

TREM – For guitars outfitted with bigsby and jazzmaster/jaguar style tremolo systems and trapeze tailpieces (approx. 1.75” twist)


The Gabriel Tenorio String Company is dedicated to the evolution and further dissemination of the string making tradition established by Francisco Gonzalez, founder of Guadalupe Custom Strings.

As a partner in Guadalupe Custom Strings, I insisted on only making round core strings--for all its lines. With remarkable results, it was only natural to revisit old acoustic formulae such as the PB 13s, known as Phosphor*Rounds and the Gypsy Jazz ManoucheTone Strings to learn from what made them so distinctive in tone and quality.  I went on to create an entire brand new line of electric guitar strings along with a slew of other steel stringed instruments. I didn't try to make something new, just something good.

But it wasn't enough to just be good enough, I wanted to make the best fitting string possible, the way Francisco had many years a go when he made my first set of custom Requinto Romantico strings--in front of my very own eyes--based on what i was doing as a guitarist and what i wanted to get from my experience as a musician. That experience has left a long lasting mark.

It took years of research and testing of set after set.  Then reconceptualizing a custom shop type of business into something I could share with the professional musician, at large. Over the last year at GCS, I was able to develop this model while developing my lines of products.

I am proud to have had the positive response of 2014 and 2015.  2016 marks the birth of this new company, theGTS,co

theGTSco uses only the finest first-drawn wire and are 100% made by hand in the USA.

The Gabriel Tenorio String Company will continue to work alongside The Guadalupe Custom Strings team at the CustomLab location in East Los Angeles. We share a tradition, a part of a community of artists and artisans, and we share the joy of working collaboratively.

For dealer requests, please email me info@theGTS.co

Latest Notes

Shipping and Production Notes Dec 2017

DECEMBER 28, 2017

*shipping glitch

Hola, everyone. So there was a slight glitch in the postage calculation this last week. Corrections have been made to those orders.

Dropping Priority Shipping

The issue has come up before as to why use Priority 2-3 day shipping from USPS if the strings don't arrive within that time frame? The strings are pretty much made to order and the cue can get weeks long. Priority Shipping provides faster service and free boxes, which means both customer and vendors benefit. However, it has caused one or two folks the inconvenience of expecting their order within a few days of ordering it. Therefore, It will be a basic rate calculation that will include a small shipping and handling surcharge.

Fulfillment Time/Lead Time

Due to the immense growth of the business on both retail and dealer/distribution fronts, fabrication times have grown, sometimes going much longer than anticipated. It is my intention to treat every client with equal respect and appreciation by following the cue in chronological order. However, i have had to make some adjustments to my production schedule to anticipate the most requested items. So I now am building stock of the most requested items one chunk of the week and smaller more detailed/custom orders during the evenings. This will help keep my dealers and my webstore stocked and lead times low.

Shipping Days

I ship twice a week: Monday and Thursday/Friday.

Yes they are long enough.

If you have purchased your first set of acoustic guitar strings from me recently, you may have noticed that the wraps do not reach the tuning posts, but the exposed cores do. Just install the strings like normal, using the cores to get 3 wraps around the tuning post. If you have any reservations please email me. Thanks


Salvage Custom Video Review

Acoustic Guitar Magazine

Check out this awesome new article about the work of Guadalupe Custom Strings and the Gabriel Tenorio String Co!

Guadalupe Makes Custom Strings the Old Fashioned Way, by Hand

By Adam Levy May 2016

Porter PickUps

The Journey: Gabriel Tenorio Strings

by Brian Porter May 2016

Fretboard Journal

Hands On: Guadalupe Custom Strings

By Brian K. Saunders February 2016

KPCC 89.3 FM SoCal Public Radio

Guitar players happily find a revived tradition at Guadalupe Custom Strings

by Robert Garrova | The Frame September 04 2015