Mosaic Bikes · Gravel
Mosaic GT-1 i55 32-Inch Gravel Bike
A handmade titanium gravel bike designed from the ground up around 32-inch wheels, and built to your measurements.
Mosaic did not adapt an existing frame to take a bigger wheel — it started again.
32-inch wheels are not new, but the bikes built around them have mostly been experiments — a bigger wheel pushed into a frame drawn for something smaller, with the handling and the tire clearance paying for it. The GT-1 i55 32 is a new platform instead: geometry, rear triangle, axle standards, 55mm of tire clearance and an in-house Zero Components 32-inch carbon fork, all developed together. Handmade in Colorado from custom double-butted titanium, made to order, and drawn to your own geometry as standard.
Specifications
- Frame
- Custom 3A/2.5V Double Butted Titanium Tubeset
- Wheels
- 32 Inch Platform
- Tires
- 55mm (2.2 inch) Clearance, purpose-built 32-inch gravel tires
- Headtube
- IS52, Fully Integrated Cockpit
- Seatpost
- 27.2 Diameter, ENVE In-Route
- Brakes
- Flat Mount, 180 or 160 Front // 140 or 160 Rear
- Brake Specs
- 15x110 Front // 12x148 Rear, Fully Integrated Brake Routing
- Drivetrain
- 1X Gravel Chainline, fits up to 46t
- Chainstays
- 440-445mm, offset seat tube, 3D-printed titanium yoke
- Dropout
- UDH Dropout and Hanger
- BB
- T47 Bottom Bracket
- Front
- Mosaic Zero Components 32-Inch Gravel Fork, 445mm axle-to-crown, 60mm offset
- Cockpit
- ENVE In-Route Stem, Seatpost and Headset
- Geo
- Rider Specific Custom Geometry
- Finish
- Choice of Mosaic Titanium, Painted or Artist Series Finish
- Compatibility
- Internal Di2 or Wireless AXS shift routing
A Platform, Not A Conversion
Mosaic did not adapt an existing frame to take a bigger wheel — it started again. The GT-1 i55 32 is built around a custom 3A/2.5V double-butted titanium tubeset with a 3D-printed titanium yoke that clears a 46t chainring on a 1x gravel chainline, a T47 bottom bracket, UDH dropouts, 15x110 and 12x148 thru-axles, and 55mm of tire clearance with room left for mud. Shift and brake lines run fully internally through an integrated IS52 cockpit, with ENVE In-Route stem, seatpost and headset and a Zero Components 32-inch carbon fork developed alongside the frame. Every one is made to order to rider-specific geometry, which is the only honest way to build a bike around a wheel this size — and the part we enjoy most, sitting down with you to get it right.
A wheel that size carries speed over rough ground and smooths out what a smaller one trips on, but only if everything else is drawn to suit it
Handmade in Colorado from custom double-butted titanium, made to order, and drawn to your own geometry as standard.
The Finer Details
A Bigger Wheel, On Purpose
The 32 in the name is the wheel and the i55 is the clearance: 55mm of tire, with mud room left over. A wheel that size carries speed over rough ground and smooths out what a smaller one trips on, but only if everything else is drawn to suit it — which is why the rear triangle, the axle standards and the Zero Components carbon fork were all developed for this bike rather than borrowed from another. A 3D-printed titanium yoke makes room for a 46t chainring on a 1x chainline.
Yours To Finish
Mosaic's finish work is the part people linger over, and rightly. Raw titanium in Ghost, Shadow or Mosaic Factory; the full range of painted finishes, standard or to your own combination; or the Artist Series, applied by hand and never quite repeated. Choosing is one of the best parts of ordering a custom bike, and it is the part we most enjoy helping with — come and see the finishes in person at Regroup.
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About the brand
Mosaic Bikes
Boulder-based Mosaic has been hand-building titanium works of art since 2009. With a range that deftly turns from the road to the trail and even towards the steep drops of the singletrack, a Mosaic stands for impeccable craftsmanship, generous customization and supreme finishing. For those and many more reasons, Mosaic's small, passionate team has earned a deserved reputation as the leading light in American small-batch bike manufacturing.
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