Tire Clearance: 27.5x2.5” or 29x2.5” standard, up to 26x5” available
Brake Style: ISO Disc
Material: Titanium

Ripping a set of banked turns without touching your brakes.
Clearing a rock garden that seemed impossible two months ago.
Getting to the bottom of a hill and screaming uncontrollably with joy.
Eating and drinking and slightly overstating how rad you got after a ride.

We love mountain biking.

We love building mountain bikes that deliver those same moments of exhilaration. We love surprising people with how capable a well-designed hardtail with a custom geometry designed specifically for your riding style and terrain can be. And we especially love that a well-built titanium mountain bike can literally be as good as new after decades of hard riding.

We can build mountain bikes for every wheel size and any tire size up to 4” fat bike tires, and for any use from single track trail riding to bike packing to epic winter snow rides.



Complete Custom Bikes :: $7,000 to $10,000+
Custom Titanium Frame :: $4,900
Custom Titanium Fat Bike Frame :: $5,200

Standard Features

Fully custom frame geometry and tube selection
Meticulously TIG-welded construction
73mm English-threaded BB
44mm head tube for tapered forks
Firefly custom 148x12mm Boost or 157x12mm Super-Boost thru-axle dropouts
Custom curved down tube for ideal fork clearance


Learn more about Carbon Neutral Manufacturing


Suspension forks from Fox, Rock Shox, Cannondale, and many others. // Call for quote
Internal Di2 routing // $200
Internal brake routing // $350
Internal dropper post routing // $250
Pressfit30 BB // $75
Custom frame bag mounts // $100
Integrated light wiring // $200
Rack mounts // no extra cost
Travel couplers // $1300
Belt drive splitter // $300

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

It’s been about a year since I received my Firefly and I could not be happier. The bike is everything I hoped it would be and more. It’s fast and stable on both the road and gravel. It accelerates beautifully and is nimble on the CX course. I commonly refer to it as “The one bike to rule them all!” You guys are amazing and I am so thankful to be able to ride such a wonderful machine. The compliments I receive are endless.

I am fortunate to have a few other custom bikes – both titanium and steel – and I only point that out to offer comparison to the Firefly. My Firefly is the bike I always want to ride. There’s just something about how it feels and responds that makes me want to ride it. So, thank you and please pass my gratitude on to the rest of the FF crew.

See the build