New Mosaic Cycles GT-2 available in standard sizing and new paint options

(Image credit: Mosaic)

Based in Boulder, Colorado, Mosaic Cycles is best known for its hand-built fully-custom steel and titanium drop bar and mountain bikes, and has just announced it is now offering 'off-the-rack' geometry, ready-to-ride frames for the first time.

The GT-2, which will still be made in the brand's Boulder manufacturing facility is available in two versions. The GT-2 45 is designed around 45mm tyres; the 71.5-degree head angle, 73.5-degree seat angle and 586mm stack and 371mm reach in a size medium mean it's ready and willing for spicy drop bar adventures.

The GT 2 AR (All Road) is designed around 40mm rubber, and sees a 72-degree head angle, degree seat angle, a 553mm stack and 275mm, and is better suited for those whose gravel riding involves a bit less fire road bashing, and a bit more mixed surface and graded gravel road riding. 

Each version of the GT-2 will be offered in stock sizing, with frames ranging from 48cm to 62cm. Beyond the clearances between the rear stays, Mosaic has adjusted the geometry between the 45 and the AR slightly, not only to allow the bike to be comfortable in the terrain the tyres allow you to access but also to account for the difference in trail created by the larger tyre. Along with width, wider or narrower tyres also changes the circumference. Straying a few millimetres bigger or smaller than the size the bike was designed around can drastically alter handling characteristics.

Both frames are made from T3A/2.5V Straight Gauge Titanium, and feature an ENVE G-Series Gravel Fork, 12x142 thru-axles front and rear, flat-mount disc brake rotors and a threaded bottom bracket.

Thanks to the clamp-on front derailleur mount, the bike can be run 1x or 2x, with the GT-2 42 available in Shimano GRX, Force 1 and GRX Di2 1x builds, and the GT-AR in Ultegra 2x, Ultegra Di2 2x and SRAM Force AXS 2x build kits.

Pricing starts at $4,200 for a frameset and tops out at $8,250 for the GT-2 AR Force AXS 2x build kit. All the frames, even with the stock geometry, are built to order and have a lead time of two to three weeks, depending on component availability. 

New paint finishes

Off the back of news about the GT-2, Mosaic has also announced its second artist series design, 'Kaleidoscopic,' in collaboration with Spectrum Paint and Powderworks. The Artist's series is a premium paint program on top of the brand's already extensive design catalogue, with each offered in a limited colourway. 

According to Mosaic, the series will evolve with the introduction of new designs and work from different artist both within Mosaic, as well as outside collaborations. The Artist is available as an option on any Mosaic model, or as a re-paint option for current Mosaic owners.

For those that prefer the look of the raw titanium finish, but are still want to add a bit of pizazz, Mosaic is now offering what it calls the Cockpit Series; the is mainframe left raw, while the stem, fork and seatpost are painted with intricate designs. For the time being, Mosaic is offering three designs; paisley, stripes and splatter, with each available to be painted up in Mosaics stock 30, colour palette. 

Colin Levitch
Freelance writer

Born and bred in Colorado, and now based in Australia, Colin comes from a ski racing background and started riding as a way to stay fit through the summer months. His father, a former European pro, convinced him to join the Colorado State University collegiate cycling team, and he hasn't stopped since. It's not often he pins on a number nowadays, and you'll likely find him in search of flowy singletrack, gravel roads and hairpin corners. Colin has worked at Bikeradar and is a regular contributor to Australian Mountain Bike and Cyclist magazines. 

Rides: BMC Team Machine SLR01, Trek Top Fuel 9, Ibis Ripley