As incredibly difficult as cross racing is, cross bikes have to be even tougher. A great cross bike is able withstand not just brutal weather, aggressive racing, and unavoidable spills, but also weekly travel, whether in a car or stuffed into a bike bag in the belly of an airplane. When we say our cross bikes are proven to shake off all of that abuse with ease, we mean it.

The Firefly-equipped Bitchn Grit racing team flies back and forth across the country dozens of times per year. In four years of sponsorship, they have raced their bikes to elite top tens, podiums, and wins (including Dani Arman’s 2019 women’s 30-34 national championship!) over and over again. And in those four years: not a single issue with any of their frames. Just worry-free, ultra-fast racing against the country’s best, mixed in with springs and summers full of gravel riding, demanding training, and not-uncommon mountain bike trail exploring. 

Combine that reliability with our industry leading custom design and manufacturing and you’ll understand why your dream cross racing bike is a Firefly.


Complete Custom Bikes :: $6,500 to $10,000+
Custom Titanium Frameset Price :: $4,900
Custom Ti-Carbon Frameset Price :: $6,900

Standard Features

Fully custom frame geometry and tube selection
Meticulously TIG-welded construction
68mm English-threaded BB
Firefly custom 142x12mm flat-mount disc brake dropouts
Proprietary Adaptive Butted Tubing
Oversized head tube for tapered forks
Enve thru-axle disc cross fork


Internal Di2 or EPS routing // $200
Internal brake routing // $350 (only available with Ti)
Pressfit30 or T47 bottom bracket shell // $75 (included with Ti-Carbon)
3D-printed chainstay yoke for 700c x 42mm or 650b x 2.1″ tires // $200
135mm quick release disc or 130mm rim brake dropouts // no extra cost
1 1/8″ head tube // no extra cost
Oversized tapered head tube for tapered forks // $100
Parlee disc cross fork with integrated fender mounts // $100
Proprietary tapered carbon integrated seat post // $800
S&S couplers // $1000
Rack mounts // no extra cost
Fender mounts // no extra cost
Pump peg // no extra cost

Bosch ebike upgrade // complete builds start at $9200 (only available on full ti bikes within the US)

All I can say is wow. This bike is awesome in ways I never imagined. Power transfer, smooth comfortable ride, responsiveness, and so quiet. All resulting in greater joy in riding. It is the most beautifully designed and executed thing I have ever owned. You and the Firefly team have earned my admiration.

See the build