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  • Options 1
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Frame Options

The following options are most of what we do, but not everything we can do. If you have any questions about other options, these options, which options make sense for you, or anything else, always feel free to email or call to ask. Or, if you can, come by and visit us. We love visitors.


Pressfit30 BB


Pressfit30 BB // $45
Our Pressfit30 BB shell fits the SRAM Pressfit30 BB and any BB30 crankset. The nylon Pressfit cups easily press into the frame, making them easier to install, maintain, and replace than standard BB30 bearings.

Available on titanium and stainless frames.


44mm HT


44mm HT // $200
Our 44mm HT fits 44mm internal headsets (i.e., Chris King Inset 1) and mixed 44mm headsets (i.e., Chris King Inset 7). The mixed headsets have an internal upper bearing cup and external lower bearing cup so they fit 1.5”-1.125” tapered forks.

Only available on titanium frames.


Internal Di2 Routing


Internal Di2 Routing // $200
We can neatly route your Dura-Ace or Ultegra Di2 wiring inside the frame. The wires enter on the DT past the HT and exit just before they reach the derailleurs for a perfectly clean, sealed system.

Available on titanium and stainless frames.


Internal Brake Routing


Internal Brake Routing // $350
For internal brake routing, we weld a ¼” titanium tube inside the top tube and cut it flush where it enters and exits the top tube for a smooth finish. The inner tube guides the rear brake housing for a clean look and easy installation while keeping the housing stiff for smooth braking.

Only available on titanium frames.


Integrated Seatpost


Integrated Seat Post // $800
Our ISP uses a custom 3-piece seat tube that is thicker at the top tube/seat tube junction for improved strength and thinner above and below to save weight. The titanium top cap has 4cm of adjustment and is made in house with custom offsets. An Enve seat clamp securely holds the seat and provides infinite angle adjustment.

Only available on titanium frames.


Disc Dropouts


Disc Dropouts // $200 (upcharge applies to cross and road frames, no upcharge for mountain frames)
Our custom made, proprietary disc dropouts can be fit on any style bike (mountain, cross, commuter, road…) to make your frame disc compatible.

Only available on titanium frames.


Rocker Dropouts // $100
Paragon Machine Works Rocker Dropouts rotate to move the wheel relative to the BB. That movement alters chain tension without affecting the disc brakes. We can also use a variety of eccentric bottom brackets (the Problem Solvers e46 is our favorite) or hubs with our disc dropouts for the same result.

Only available on titanium frames.


Lefty HT // $400
Custom oversized HT to accommodate a Cannondale Lefty fork and its proprietary steerer tube and headset.

Only available on titanium frames.


Rack Mounts


Rack Mounts // No cost
Threaded bosses on the seat stays and eyelets on the dropouts for racks.

Available on titanium and stainless frames.


Fender Mounts


Fender Mounts // No cost
Threaded boss on the chain stay bridge and eyelets on the dropouts for full fenders.

Available on titanium and stainless frames.


Pump Peg


Pump Peg // No cost
Small stud on the head tube or seat tube to support a frame pump.

Only available on titanium frames.


S & S Couplers


S&S Couplers // Titanium $1000 // Stainless $750
Precision lugs made by S&S Machine allow you to split your frame in half and pack it in a convenient S&S box, saving you from baggage fees and makes transporting it to, around, and from the airport very easy. Couplers add less than 1lb and don’t affect ride quality. Custom lug shaping available.

Available on titanium and stainless frames.


Belt Drive


Belt Drive // $300
We add a small coupler to the seat stay or dropout, depending on the dropout. The belt fits through that coupler for easy installation.

Available on titanium and stainless frames.


Rohloff Cable Routing


Rohloff Cable Routing // $100
Special cable routing for Rohloff hubs.

Available on titanium and stainless frames.

Purchase

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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