The Firefly Titanium Mountain Bike

Introducing the newest category in our growing lineup of high performance custom bicycles: the Firefly Titanium Mountain Bike...

The design process for this bike began with an advanced approach to the titanium disc dropouts. We worked closely for months with the infamous Peter Verdone of PVD Designs dialing in every ounce of performance, brake compatibility and shedded gram after gram of weight. Our goal was to get to the essence of their function.

The resulting 7mm thick 6Al/4V titanium machined dropouts weigh in at a feathery 156.2 grams per pair.

On the front end of the bike we are offering both 44mm InSet and standard 1.125″ diameter head tubes. The 44mm inset head tubes are quickly becoming the new standard for mountain bikes, allowing the use of oversized tapered steerers that are found on many of the high performance suspension forks now readily available. The larger diameter fork steerers exponentially increase front end stiffness and overall fork strength. We are also gusseting the headtubes at the downtube junction to increase the front end rigidity and strength to match the burliness of these new generation forks. Each gusset is hand cut at precise angles to match up to the geometry of the joint.

Like all of the other frames we make each Titanium Mountain Bike is double-pass T.I.G. welded by hand in our Boston shop.

Below are three examples of some frames we have finished recently:

Above and below are a couple of 26″ frame sets. Both frames are zirconium bead blasted with polished anodized graphics and matching Firefly Titanium Seatposts.

This 29′er frame was designed around the use of a Rohloff Speedhub internally geared hub and the Gates Carbon Belt Drive System.

The drive side seatstay has welded-in stay splitter making it possible to add and remove the belt from the frame.

Both the frame and seatpost feature matching polished graphics with blue anodizes details.

The legacy of the cutting-edge handmade titanium hardtail mountain bike lives on in New England.

Right here in Boston.

11 Responses to The Firefly Titanium Mountain Bike

  1. peter

    OH MAN!!! I have a hot nasty crush on this bike.

  2. ricardo


  3. wade

    What is with the center bar position??
    Otherwise, complete and utter WANT.

  4. steggs

    true craftmanship, looking at this frame gives me a tuffty. Im on the hunt for a new 26inch hardtail this could be it………

  5. Jay

    What kind of crankset is that?



  6. Stevie

    Ouch! That’s the best bike porn ever!

  7. chris

    That is simply art!

    welded-in stay splitter is genius.

    Will this bike be in Providence, Oct 7?

  8. Thanks Ben, 22.2mm bars with a 31.8mm shim.


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.

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

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