GT-2 i55
OUR MOST CAPABLE GRAVEL BIKE YET, READY TO RACE
Like the GT-1 i55, the GT-2 i55 is the product of years spent designing, building, riding, and racing bikes across every terrain we could find. It exists for a single reason: to give modern gravel riders and racers a bike built specifically for them. The GT-1 i55 stands apart from the the GT-1 for its simplicity and ready to order standard sizing.
Its foundation is Mosaic's straight-gauge titanium tube set, paired with our proven geometry — a combination that's earned its reputation for confident handling, responsive performance, and long-term durability.
The standout feature is 55mm of tire clearance. Getting there took a complete frame redesign: a 3D-printed chainstay yoke that shortens the chainstays while clearing both the 55mm tire and a 50-tooth chainring; an offset seat tube to make room for the larger tire; and a proprietary Mosaic carbon gravel fork with gravel-tuned offset and a suspension-corrected axle-to-crown.
The GT-2 i55 also comes in standard geometry through our Batch Built program, so you get the same Mosaic craftsmanship with faster turnaround.
Bottom line: there's nowhere the GT-2 i55 won't take you.
Its foundation is Mosaic's straight-gauge titanium tube set, paired with our proven geometry — a combination that's earned its reputation for confident handling, responsive performance, and long-term durability.
The standout feature is 55mm of tire clearance. Getting there took a complete frame redesign: a 3D-printed chainstay yoke that shortens the chainstays while clearing both the 55mm tire and a 50-tooth chainring; an offset seat tube to make room for the larger tire; and a proprietary Mosaic carbon gravel fork with gravel-tuned offset and a suspension-corrected axle-to-crown.
The GT-2 i55 also comes in standard geometry through our Batch Built program, so you get the same Mosaic craftsmanship with faster turnaround.
Bottom line: there's nowhere the GT-2 i55 won't take you.
Highlights
Fits up to 50t gravel offset chainring
shortened chainstay length with offset seat tube
3D printed titanium chainstay yoke
the GT-2 i55 gravel race bike
One by gravel groupset gearing only
Semi integrated brake routing
Suspension corrected carbon fork with 55mm tire clearance
Internally routed front end with Cane Creek HCR headset
UDH dropout compatible
Features
- T3A/2.5V Straight Gauge Titanium Tubeset
- Batch Built Standard Geometry
- 700x55mm Tire Clearance
- Mosaic Gravel Fork, suspension corrected
- 44mm Headtube
- 27.2mm seatpost diameter
- 140 native flat mount brake, 160mm with adpater
- Internal Di2, or Wireless AXS shift routing
- Ghost Titanium Finish
- Internal Brake Routing
- 12x100 Front // 12x142 Rear
- 1X Gravel Chainline only, fits up to a 50t chainring
Batch Built Lead Time : 3 Weeks
The Mosaic Batch Built program utilizes our proven size run of geometry to deliver a simpler, more standardized offering, available in a shorter timeframe.- Rider Specific Geometry*
- Choice of Mosaic Painted Finish*
- Factory Titanium Finish*
- Rack Mounts*
- Fender Mounts*
- Extra H20 Mounts*
- Bento Box mounts*
Additional Options
Contact Mosaic for pricing.Geometry
Rider Specific Geometry
With a fit-first design approach, custom geometry is drawn up based on bike fit information provided by you and your Mosaic Dealer. Taking into account each rider’s aspirations and use case for the bike, we continue to fine-tune the design to culminate in a riding experience and handling that is perfect for each unique frame that we build. Custom geometry is included as standard on our 1-Level bikes, giving us the opportunity to build the perfect bike for each rider 100% of the time.
Your Bike. Your Fit.
Your Geo.
Geometry driven by your body, made to fit your contact points.
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Mosaic Batch Built Geometry
The Mosaic Batch Built program utilizes our proven size run of geometry to deliver a simpler, more standardized offering, available in a shorter timeframe. By building standard geometry frames together in a batch, configured in an intentional and similar way, we’re able to deliver a batch-built frame in 2-3 weeks, while allowing the customer to choose how their bike is finished.
Same Mosaic Quality. Better availability.
Fine tuned standard geometry, beautiful finish, ready to deliver in days.
Find in stock framesets now
| Frame Size | XS | SML | SML-MED | MED | LRG | XL | XXL | 3XL |
|---|---|---|---|---|---|---|---|---|
| Frame Size | 48 | 50 | 52 | 54 | 56 | 58 | 60 | 62 |
| HT Angle | 70 | 70.5 | 71 | 71 | 71 | 71 | 71 | 71 |
| ST Angle | 73 | 73 | 72.5 | 72 | 71.5 | 71.5 | 71 | 71 |
| ST Length (C-T) | 480 | 500 | 520 | 540 | 560 | 580 | 590 | 600 |
| TT Length (Eff) | 519.3 | 530.3 | 540 | 550 | 570 | 585 | 600 | 610 |
| HT Length | 90 | 95 | 110 | 120 | 130 | 155 | 175 | 200 |
| Wheelbase | 1022 | 1029 | 1030 | 1035 | 1050 | 1065 | 1074 | 1084 |
| Chainstay Length | 430 | 430 | 430 | 430 | 430 | 430 | 430 | 430 |
| Fork Offset (Rake) | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 |
| Front Center | 605.1 | 611.6 | 612.2 | 617.3 | 632.1 | 647.2 | 656.7 | 666.6 |
| Trail | 74.9 | 71.4 | 68 | 68 | 68 | 68 | 68 | 68 |
| Standover | 777.9 | 788.4 | 803.1 | 816.6 | 830.1 | 849.2 | 862.7 | 877 |
| BB Drop | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 |
| BB Height | 286.5 | 286.5 | 286.5 | 286.5 | 286.5 | 286.5 | 286.5 | 286.5 |
| TT Angle | 9.98 | 7.68 | 6.76 | 5.65 | 4.52 | 4.42 | 5.43 | 6.34 |
| Stack | 543.6 | 550.2 | 566.4 | 575.9 | 585.3 | 609 | 627.8 | 651.5 |
| Reach | 372.5 | 381.5 | 381.3 | 383.2 | 394.9 | 401.9 | 405 | 406.8 |
Finishes: Choose your wow factor.
The finish is the first thing we see. And when you’re excited by the sheer look of your Mosaic, it also gets you excited to get out and ride. And that’s what it’s all about. So whether you choose to let the metal be the star of your titanium frame, or opt for a super colorful paint scheme that’s uniquely you, the goal is to come up with a look that’s going to light you up and get you out there. Ready? Let’s make it yours.
Titanium Finishes
Classic, clean and light, this is the choice for those who love the beauty of raw metal, impeccable welds and subtle logos. Choose between Ghost, Shadow, and Mosaic Factory titanium finish options.
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Painted Finishes
Go big. Go loud. Go subtle. Go pure. With multiple Standard and Artist Series layouts to choose from and a nearly infinite number of color combinations, it's easy to make your Mosaic uniquely yours.
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Artist Series
One-of-a-kind by design, this is where paint becomes art. From the fractured lines of Shatter to the cosmic depth of Nebula, each Artist Series layout is hand-applied to turn your Mosaic into a true original.
Artist Series