GT-1 i55 Frameset

GT-55: Mosaic’s most capable gravel race bike.

The GT-1 i55 pairs Mosaic’s time-tested titanium tube set with a fully redesigned frame offering 55mm of tire clearance — the most of any Mosaic model. A 3D-printed chainstay yoke, offset seat tube, and proprietary carbon gravel fork work together to deliver confident handling and race-ready performance, built for the modern gravel rider.

The Mosaic GT-1 i55 is now available through our batch built program. Finished in Matte Knockout Dark Graphite. For the new model, pre-orders on all sizes can be made on backorder through August 31st, full frameset delivery end of September. For more information on the GT-1 i55 visit our model page

• 3A/2.5V Double Butted Titanium Tubeset
• 8 Standard Sizes
• 700x55mm Tire Clearance
• Mosaic Gravel Fork, suspension corrected
• Enve IS52 headset
• IS52/IS52 Headtube
• T47 68mm Bottom Bracket shell
• 27.2 Seatpost Diameter
• 140mm Flat Mount Brake Mounts (160mm with adapter)
• Di2 or Wireless AXS shift only
• Matte Pearl Dark Graphite Knockout
• 12×100 Front // 12×142 Rear
• ENVE In-Route Integrated Stem & Seatpost included
• Fully Integrated Brake Routing

Our Batch Built program pairs Mosaic’s high quality craftsmanship with in stock availability for riders that want a quick delivery and a standard sizing.

If standard size and finish are not enough, our Made to Order frames have nearly infinite personalization through custom geometry and finish work options, all deliverable in 6-8 weeks. Reach out to us here and we can help you get started on your dream build.