Mosaic GT-1 i55 32" Titanium Frameset

A purpose-built titanium gravel frameset engineered from the ground up around 32-inch wheels for greater speed, control, and capability.

Overview

The Mosaic GT-1 i55 32" takes modern gravel performance into entirely new territory. Handcrafted from Mosaic’s custom 3A/2.5V double-butted titanium tubeset, this platform was designed from the beginning around 32-inch wheels—not adapted from an existing 700c frame.

Mosaic developed the geometry, rear triangle, axle standards, tire clearance, and proprietary Zero Components 32-inch carbon gravel fork together as a complete system. The objective is simple: capture the rollover, traction, and momentum advantages of a larger wheel while preserving the responsive handling and precise ride character expected from a performance gravel bike.

With clearance for 32×55mm tires, rider-specific geometry, fully integrated routing, and modern gravel standards throughout, the GT-1 i55 32" represents one of Mosaic’s most progressive titanium platforms.

Frame Design & Ride

The defining characteristic of the GT-1 i55 32" is its purpose-built 32-inch wheel platform.

The larger wheel diameter is designed to roll more efficiently across rough terrain, maintain momentum through demanding surfaces, and provide increased stability and confidence at speed. Rather than simply fitting larger wheels into an existing chassis, Mosaic redesigned the bike around them to maintain balanced handling and a connected ride feel.

A custom 3D-printed titanium chainstay yoke provides clearance for tires up to 32×55mm while accommodating a 1X gravel drivetrain with chainrings up to 46T.

The Zero Components carbon 32-inch gravel fork was developed specifically for the platform, while fully internal brake routing through the cockpit and downtube gives the bike a clean, modern appearance.

Combined with Mosaic’s rider-specific geometry, the result is a big-wheel gravel bike designed to feel remarkably natural beneath the rider—fast, composed, and capable when the terrain becomes increasingly demanding.

Key Features

• Custom 3A/2.5V double-butted titanium tubeset

• Purpose-built 32-inch gravel platform

• 32×55mm tire clearance with additional room for mud

• Zero Components 32-inch carbon gravel fork

• 3D-printed titanium chainstay yoke

• Fully integrated IS52 cockpit

• Fully internal brake routing

• ENVE In-Route stem and headset integration

• UDH dropout and hanger

• 1X gravel drivetrain specific

• Up to 46T chainring clearance

• Rider-specific custom geometry included

• Choice of Mosaic painted or raw titanium finish

Technical Details

• Frame Material: Custom 3A/2.5V Double-Butted Titanium

• Wheel Size: 32"

• Tire Clearance: 32×55mm

• Head Tube: IS52

• Bottom Bracket: T47

• Seatpost Diameter: 27.2mm

• Fork: Zero Components Carbon 32" Gravel Fork

• Front Brake Mount: Flat Mount, 180/160mm

• Rear Brake Mount: Flat Mount, 140/160mm

• Front Axle: 15×110mm

• Rear Axle: 12×148mm

• Drivetrain: 1X Gravel Only

• Maximum Chainring: 46T

• Shift Routing: Internal Di2 or Wireless AXS

• Brake Routing: Fully integrated through cockpit and downtube

• Headset: ENVE In-Route included

• Dropout: UDH

• Geometry: Rider-specific custom geometry included

Ideal Use

• Performance gravel riding and racing

• Fast, rough and technical gravel terrain

• Long-distance gravel events

• Riders seeking improved rollover and momentum over challenging surfaces

• Riders looking for a truly unique, purpose-built titanium gravel platform

Custom Order Information

The GT-1 i55 32" is currently offered as a Made to Order frameset with rider-specific geometry included.

Each frame is designed around the individual rider using fit information, riding goals, intended terrain, and desired handling characteristics. Customers can choose from Mosaic’s standard painted and raw titanium finishes, with additional options available for further personalization.

Current Made to Order lead time is approximately 8 weeks.

The price shown represents a pre-order deposit toward your custom Mosaic frame.

Final pricing may vary based on specifications, finish, and selected options. The remaining balance will be due once your order is complete and ready for pickup.

Please contact Category One Cycles prior to ordering for assistance with fit, rider-specific geometry, finish selection, component compatibility, current lead times, or designing your complete GT-1 i55 32" build.

For sales inquiries or custom build consultations, reach us at info@categoryonecycles.com.

For service appointments, repairs, or bike fitting, contact service@categoryonecycles.com.

You can also reach us by phone at (610) 509-3554