• Bones-slide-1
  • Bones-slide-2
  • Bones-slide-3
  • Bones-slide-4

The Bones Project

We have designed and built thousands of steel frames in our careers, and we have developed a deep respect for the material and process. The Bones Project is our opportunity to use our knowledge and
unique approach to frame building to push the functional and aesthetic boundaries of the most storied material in cycling.

The Bones Project exists at the intersection of manufacturing, art, and performance. It is a collaboration of designers, machinists, frame builders, and artists, most importantly the brilliantly talented local illustrator, designer, and muralist Eric Bones.

The frames start with the most high tech steel bicycle tubing the world has ever seen: custom-designed, niobium-doped, progressively-butted Columbus Spirit HSS Tubing. The dropouts are designed by the infamous Peter Verdone and locally machined by Cantabridgian Mechanics. Peter took the iconic design
we use for our titanium bikes and refined them specifically for steel, creating a beautifully slim, light,
and strong piece of precision engineering.

We will only make 22, all manufactured in June of 2014. Every one will be custom designed and built for
the rider, hand-painted with pain-staking detail by Eric Bones, and then sent to renowned frame painter
Jay Nutini of Circle A Cycles in Rhode Island for clear coating. We will build each bike in our shop with components carefully chosen to not only work perfectly, but also complete the visual goal of the project.

These are more than just bikes, these are individual art pieces designed and built to be admired and
ridden hard.

Please email kevin@fireflybicycles.com to reserve yours.

The Bones Project // #1

  • The Bones Project 1 – 1
  • The Bones Project 1 – 2
  • The Bones Project 1 – 3
  • The Bones Project 1 – 4
  • The Bones Project 1 – 5
  • The Bones Project 1 – 6
  • The Bones Project 1 – 7
  • The Bones Project 1 – 8

About the Artist :: Eric Bones

“My art began at the intersection of all things industrial, anatomical, and metaphysical; growing from paper cutouts and miniature drawings when I was younger to now sprawling and overlapping murals that I can barely control. Remnants of graphic design can occasionally be seen in my work, often being slain by accompanying chaotic swarms of intentionally abstracted limbs and shapes.

I almost never sketch or plan things out, my work is executed directly onto a surface from a mental concept. Liberal use of heavy black lines and looping contorting forms guide the eyes through an otherwise infinite maze, bringing me relief.

I am heavily influenced by the graffiti and wheat paste of New England and New York, as well as nature and all things intentionally and well designed. Other general influences include sciences, bone structures, and letter forms.” – Eric Bones


  • Fully custom frame geometry
  • Hand-painted finish by Eric Bones
  • Custom designed, proprietary Columbus Spirit HSS tubing with multi-faceted main tubes, asymmetrical chain stays, and super-slim tapered seat stays
  • Pete Verdone designed custom Firefly dropouts
  • Meticulously TIG-welded construction
  • Enve carbon fork
  • Optional Di2 internal routing
  • Optional oversized HT with 1.5” tapered Enve fork


  • Shimano Dura-Ace Di2 9070 // $11,870
  • Shimano Dura-Ace 9000 (as shown) // $10,380
  • Shimano Ultegra Di2 6870 // $10,220
  • Shimano Ultegra 6800 // $9,125
  • Email us for a complete parts list.


We invite you to work with us directly. If you’re ready to get your hands on a new Firefly, begin here by completing the correct Firefly Fit Form to the right or contacting Kevin Wolfson at 617.825.3473. (Download Adobe Reader XI to easily fill out, save, and email the fit form.)

After we have an initial conversation and receive your custom fit form, we will set up an in-depth interview to talk about you, your perfect bike, and how we will make it a reality.

Download the PDF Download the PDF Download the PDF

We also work with a small handful of premier fit studios we know and trust.

Join the Family