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Mosaic GT-X Ti gravel bikes get big clearance, w/ custom tubeset & geometry as standard

mosaic gt-1x adventure titanium gravel framesets
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Mosaic Cycles have introduced two new titanium gravel framesets to their G-Series adventure line-up; the Mosaic GT-1X and GT-2X. Built around proper 29″ x 2.25″ tires and decorated with a multitude of mounts, these frames are undoubtedly an attractive option for bikepackers looking for a lightweight and all-terrain capable ride. Mosaic offer no fewer than six frame sizes, with double-butted and plain gauge framesets to choose from, plus the option to go full custom with geometry to suit the individual rider.

Mosaic GT-1X and GT-2X Titanium Gravel Bikes

mosaic titanium gravel bike gt-2x bikepacking setup

Mosaic have been offering stock sizing on their gravel and all-road bikes for some time now, bringing the price of their titanium frames down to something a lot more realistic. We’re pleased to see they’ve continued this with the launch of their new G-Series adventure framesets, designed with much larger tires in mind. Both the Mosaic GT-1X and GT-2X are able to accommodate 29″ x 2.25″ tires. Thus, in terms of terrain, it’s unlikely the bike will be the limiting factor as to where this ride can take you.

The GT-X bikes run 12mm x 142mm rear axle spacing, with a 68mm English threaded bottom bracket. Both are able to run mountain and gravel-specific group sets (Shimano GRX, SRAM XPLR or SRAM Force Wide) with a maximum chain ring size of 42T (1x only). Cable routing is internal with scope for running electronic shift groups like Di2 and eTap.

mosaic gt-x2 ti gravel bike 2.25" tire clearance unloaded

The Mosaic GT-2X is the most affordable option. It gets a straight gauge tubeset (same thickness throughout), with six stock sizes to choose from (S-XXL). You can also get custom geometry at a premium. That stock geometry sees long effective top tubes (530mm-615mm) meant to be paired with a short stem giving riders the freedom to spec flat or drop bars depending on their riding style.

mosaic gt-1x double butted titanium frameset full custom geometry

The Mosaic GT-1X gets a double-butted tubeset, making it the lighter of the two framesets. Custom geometry and a rider-specific tubeset are included as “standard” options on the GT-1X, making it a truly custom build. This one is available with the Mosaic Paint Layout, or the Mosaic Factory Finish. 

mosaic gt-2x bikepacking setup lightweight titanium frameset 29 x 2.25" clearance

When it comes to carrying kit, the Mosaic GT-X bikes have a place for everything. Both framesets come with an ENVE Adventure Fork, with mounts for fenders and Anything Cages. On the frame itself, there are mounts for a rear fender, plus a customisable number of bosses on the top tube, downtube and stays for the fitment of racks, accessory mounts and frame bags.

Mosaic GT02X Titanium Adventure Frameset Geometry Chart

Pricing & Availability

The new Mosaic GT-X adventure bikes are built to order and finished in Mosaic’s Boulder, Colorado facility. Orders can be placed through a Mosaic dealer, and frames carry a 12 week lead time. Get in touch with a Mosaic dealer for info on pricing.


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2 years ago

Finished in Boulder, but welded where?

2 years ago
Reply to  cheese


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