The Mosaic GT-2 45 will delivers the riding experience you expect from a Mosaic, at a price point that rivals the plentiful mass-produced options that are available. Like every Mosaic, the GT-2 45 is built by their team of exceptionally skilled craftspeople in Boulder, CO every step of the way from design, to framebuilding, welding and finishing.

The Black Magic Paint Cerakote Edition Shimano GRX Di2 2X Complete Bike features our own special finish and is only available here at Black Magic. The frame includes ultra thin matte ceramic logos painted on the frame and a matching painted headbadge. The standard color is black but many other matte colors are also available. Please call or email for a current list of optional colors!

The GT-2 45 is designed around 45mm tires, meaning you’ll likely find yourself riding routes you never thought possible on a “road bike”, and trust us, that’s where the most fun is to be had! Most times up to 48mm (measured) will clear in the frame and fork for those looking for even larger tire clearance. The GT-2 45 also works well with a second pair or wheels set up with a larger slick for road/smoother gravel riding for even more versatility and value.

All of these bikes will be built to order for the customer to allow for sizing of cockpit pieces, crankset, and choice of tire size at no additional cost. Since we are building these bikes for each rider, we can also provide upgrades like ceramic bearings from Ceramicspeed, alternative tire choices, alternative/additional wheelset options, and 1X drivetrains. We will be in touch with each customer individually after the purchase to finalize sizing and details. Fully custom build specs are also available. Please call or email for any questions about upgrades/changes to the build.

Other builds available with Sram, Shimano, and Campagnolo groups. Please call or email to discuss options.

Bikes will be shipped fully adjusted and 95% assembled in an oversized container. Simply install your wheels and seatpost and you’ll be ready to ride.

Frameset Features

Tubeset || T3A/2.5V Straight Gauge Titanium

Fork || Columbus Futura Cross + (adjustable rake 47/52mm)

Headset || Cane Creek 40

Brake Mount || Flat Mount Disc

Brake Routing || Internal (External available upon request)

Axle Spacing || 12x100 Front // 12x142mm Rear

Bottom Bracket || Threaded English 68mm

Seatpost Diameter || 27.2mm

Front Derailleur Mount || Clamp On

Water Bottle Mounts || Three - Down tube (top and bottom) and seat tube

Tire Clearance || 48mm 

Chainline || Gravel Chainline (Must use SRAM XPLR, Force Wide or Shimano GRX.

Drivetrain Compatibility || eTap, Di2, or external mechanical specific.

Other Finish Options || Standard Raw Finish, Mosaic Paint Layouts, Full custom Black Magic designs. Call or email for pricing.

Sizing || 48, 50, 52, 54, 55, 56, 58, 60, 62, full custom

Lead Time || 10-12 weeks for custom, 1-4 weeks stock geometry.

Component Specifications

• Frame: Mosaic GT-2 45 BMP Cerakote Edition

• Fork: Columbus Futura Cross + (adjustable rake 47/52mm)

• Rear derailleur: Shimano GRX 815 Di2

• Front derailleur: Shimano GRX 815 Di2

• Shifters: Shimano GRX 815 Di2

• Brakes: Shimano GRX. MT-900 Rotors 160mm front & rear

• Crank: Shimano GRX 810 2X

• Chainrings: Shimano 31/48T

• BB: Shimano

• Cassette: Shimano CS-HG800-11 11-34

• Chain: Shimano CN-HG701 11 Speed Chain

• Headset Spacers: Carbon

• Stem: ENVE Carbon Road

• Handlebar: ENVE Composites SES AR Carbon, Compact Road, or Gravel

• Seatpost: ENVE Composites Carbon Road, 27.2mm

• Wheelset: ENVE Composites AG25

• Tires: Rene Herse 700C X 42 Hurricane Ridge TC Tire

• Tubeless Sealant-Orange Seal Endurance

• Saddle: Fi'zi:k Terra Argo X3-160mm

• Bartape: ENVE Composites-Black

• Extras: Di2 charger included

*Specifications are subject to change due to supply and photos may not always 100% represent current specs listed above*

• Once your order is placed, we will reach out to confirm cable routing/drivetrain spec, logo colors, and any other details.

• Enve stem and seatpost not included in frameset price but can be added for an additional cost.

• Please inquire about availability/lead time if your size/configuration is not in stock