Frame

Mosaic GT1-AR

Drivetrain

Shimano Ultegra Di2 R8100 12-speedUltegra 11x34T Cassette
Ultegra 52x36T Chainrings

Wheels & Tires

ENVE SES 3.4
Vittoria Corsa N.EXT tires
ENVE Hubs

Headset / BB

Chris King Headset
Chris King BB

Cockpit & Seatpost

Enve Stem
Enve AR Handlebar

Mosaic GT1-AR

The Bronco

Titanium has a way of outlasting trends. While carbon chases marginal gains and steel trades on nostalgia, ti just quietly does the job—year after year, ride after ride—without asking for much in return.

This Mosaic GT1-AR was built for a rider who wanted exactly that: one bike, done right, meant to last. Mosaic builds each GT1 by hand in Boulder, and the AR platform is their all-road answer—road manners with enough clearance and compliance to follow the pavement wherever it stops being pavement.

We spec'd it around components chosen to match the frame's longevity. Nothing here is disposable.

Frame

Mosaic GT1-AR

Mosaic's all-road titanium platform, hand-built in Boulder, Colorado. Titanium remains the material riders reach for when they want one frame for the long haul—corrosion-proof, fatigue-resistant, and forgiving over distance without going soft. The GT1-AR adds clearance and a touch more compliance to Mosaic's road geometry, making it equally at home on a fast group ride or a long day on mixed surfaces.

Drivetrain

Shimano Ultegra Di2 R8100 12-speed · Ultegra 11x34T Cassette · Ultegra 52x36T Chainrings ·

Shimano's 12-speed Ultegra Di2 delivers the precision of electronic shifting without the price of Dura-Ace. Wireless, fast, and consistent in any condition—the kind of drivetrain you stop thinking about because it simply works.

Wheels & Tires

ENVE SES 3.4 · Vittoria Corsa N.EXT tires · ENVE Hubs

ENVE's SES 3.4 is the do-everything road wheel—a mid-depth profile that balances aerodynamics with crosswind stability and all-day comfort. Built for riders who want one wheelset for everything from flat roads to climbs.

Cockpit/Suspension

Enve Stem · Enve AR Handlebar · Chris King Headset · Chris King BB

A fully integrated ENVE cockpit: the AR handlebar, ENVE stem, and ENVE fork working as a system. The AR bar's subtle flare and ergonomic tops suit long days and varied terrain, and the matched components keep the front end clean and cohesive.

Customizations

Deep metallic blue with a white Mosaic logo and orange accent details at the headset and seat collar. A classic road aesthetic with just enough personality to mark it as a one-off.

Build Brands

The deep blue finish with its orange accents wasn't an accident—it's the kind of detail that makes a bike feel like yours rather than a model off a wall. But the finish is the part you notice first and think about least. What you'll come back to is how it rides: planted, lively, unbothered by rough roads, the way a well-built titanium all-road should feel.

This is the bike you stop shopping after. That's the point.

Your best ride starts here

From small adjustments to complete overhauls, our mechanics are here to keep you moving. Schedule your service appointment now and experience the Alpha difference.

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