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)

Just wanted to say thanks for building an absolutely great ride for me. Honestly I was a bit apprehensive going into this process since I have always had a chance to test ride whatever I was buying, but in this case I was flying blind. Needless to say all my fears have been put to rest.

Last weekend I got to take the bike out for its first proper ride. It was a 40mi/4500ft ride which had some 14% stretches, some great technical descents and a flat section with not so great pavement. The bike handled all of these with aplomb. The frame was stiff without being uncomfortable and plenty compliant over the rough loose gravel sections without feeling slow.

See the build