GT-1 45: Go Bigger. Ride Harder. Demand the best.

It’s no surprise that the GT-1 45 is one of our most popular models—with the Mosaic mix of butted, oversized titanium tubing and clearance to comfortably run 700x45c tires, it absolutely nails the sweet spot in terms of do-whatever versatility and race bike performance. All-day backcountry adventures? Check. Sweet singletrack? No problem. Epic gravel race podium? Local cyclocross series? If you have the watts, the GT-1 45 will get you there. The only thing the GT-1 45 won't do is compromise.

Compared to the GT-1 AR, the GT-45 has a longer wheelbase to facilitate the added tire clearance and add off-road stability, and oversized tubing to increase stiffness with minimal impact on ride compliance due to the larger tires.

As our top-end gravel machine, the GT-1 45 is replete with our light and lively rider-tuned, butted titanium tubeset and available with custom geometry, painted finishes and other options. Want fully integrated cables? We do that too. Check out the GT-1 i45.

Highlights

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Geometry optimized for 700x45mm tires.
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Like all Mosaics, an eye-searing finish is always an option.
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Designed for 1x gravel chainline drivetrains.
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External cockpit, internal downtube brake routing on the GT-1 45.

Features

  • Custom T3A/2.5V Double Butted Titanium Tubeset
  • Rider Specific Geometry
  • 700x45mm Tire Clearance
  • Chris King Inset 7 Headset
  • 44mm Headtube
  • 68mm BSA Bottom Bracket
  • 27.2 Seatpost Diameter
  • Clamp-On Front Derailleur Mount
  • Flat Mount Brake Mounts
  • External Mechanical, Internal Di2, or Wireless AXS shift routing
  • Choice of Mosaic Painted Finish
  • 12x100 Front // 12x142 Rear UDH
  • Gravel Chainline
  • Internal Downtube Brake Routing

Made To Order Lead Time : 8 Weeks

Made to order from scratch including custom geometry, configuration and choice of finishwork.
  • Rack Mounts
  • Fender Mounts
  • Pump Peg
  • Extra H20 Mounts
  • Chain Hanger
  • 27.2 & 31.6 Seatpost Diameters
  • Braze-On Front Derailleur Mount
  • Mosaic Artist Series Finishwork*

* options at additional cost.

Contact your Mosaic Dealer 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.

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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