Custom, handbuilt frames were the original "gravel" bikes, built around bigger tire clearance but with road-going geometry. The Mosaic GT-1 i55 is the natural successor to these original all-surface machines.
Explore the GT-1 i55 Titanium Gravel Bike
Designed for timeless durability in all conditions, the RT-1 is a perennial favorite at Above Category, a showcase of bespoke precision and exceptional domestic manufacturing.
Explore the RT-1 Titanium Road Bike
RT-Zero marks a new chapter for Mosaic road, where titanium precision meets carbon discipline.
Explore the Mosaic RT-Zero Road Bike
Built and tested right on the Colorado front range, the MT-1 is the flagship fat tire offering from the venerable Mosaic Cycles.
Explore the MT-1 Titanium Mountain Bike
The perfect introduction to the Mosaic handmade titanium experience.
Explore the Semi-Custom Mosaic GT-2 Titanium Gravel Bike
A titanium XC hardtail for the modern era.
Explore the Semi-Custom Mosaic MT-2 Hardtail Mountain Bike
A perfectly adorned dream machine.
Explore the AC Pre-Owned: Mosaic RT-1 - Blue Fade, Size 54cm
A Mediterranean blue Mosaic RT-1, equipped with Campagnolo’s Super Record drivetrain, BORA WTO 33 wheels and Deda finishing kit. Ready to ride home today.
Explore the AC Pre-Owned: Mosaic RT-1 - Blue/White, Size 56cmProvenance
The world’s finest custom and ready to ride dream bikes, considered upgrades, handpicked products, and cycling culture.
The AC Journal
June 2024
Last year, I went to Emporia, KS, for the first time to race Unbound, 'the world's premier gravel event' and the unofficial world championship as far as anyone and everyone is concerned. I had won the lottery system for an entry into the 100-mile version of the race and spent a good part of 6 months training. I also had a one-year-old daughter who was st...
March 2022
Out of the Saddle is a video series spotlighting riders in the Above Category community and the dream bikes we build for them. In our first episode, we feature an icon of Marin cycling, Salifu Mohammed, a masterful painter from Ghana who reflects on how riding bikes became a way of life, his passion for art, and how his AC custom Mosaic GT-1 bike brings t...
March 2023
One of our closest frame-building partners is Mosaic Cycles out of Boulder, CO. Founder and head welder Aaron Barcheck is our kind of people: direct, no-nonsense and dedicated to his craft. This zero-fluff mentality translates directly into his frames. Mosaic makes some of the most performance-first titanium and steel bikes in the United States. Sure, the...