mosaic gravel bike Mosaic RT-Zero Frameset

mosaic gravel bike Mosaic RT-Zero FramesetEach RT Zero is Made to Order. The exact tube selection, including diameter, wall thickness, and butting profile will be tailored to you. If you know the Mosaic RT 1, the RT Zero delivers an even livelier, more responsive feel during hard efforts and out of the saddle climbs. The oversized downtube and Zero Ops carbon seatmast create an exceptionally stiff bottom bracket and near instantaneous power transfer. Building on that rigid foundation, the

Each RT-Zero is Made-to-Order. The exact tube selection, including diameter, wall thickness, and butting profile will be tailored to you. 

If you know the Mosaic RT-1, the RT-Zero delivers an even livelier, more responsive feel during hard efforts and out-of-the-saddle climbs. The oversized downtube and Zero Ops carbon seatmast create an exceptionally stiff bottom bracket and near-instantaneous power transfer. Building on that rigid foundation, the carbon seatmast and topper add critical compliance, delivering something many bikes promise but few deliver: a ride that’s simultaneously smooth and sharp. The RT-Zero wants to be pushed on every rise and roller, and on descents it tracks with the precision and poise Mosaic is known for: stable and confidence-inspiring from the first ride.

Pricing starts at $11,000 for the Shadow Titanium frameset. That includes the frame, fork, Enve SES AR or SES Pro One Piece Bar Stem, Chris King Aeroset, Mosaic Zero Ops carbon seatmast & topper, and RT-Zero Titanium finishwork. 

Artist Series Painted Finishwork is offered as an upgrade.

Partington Wheelset & CeramicSpeed upgrade packages are available as options. 1200g wheels. 

Availability: 25 First Edition RT-Zero modules are available by pre-order only. We can help you step-by-step.

Initial Delivery: RT-Zero’s ordered during the order window will be delivered beginning in February and completed no later than the end of March, 2026.

Key Features:

Mosaic Zero Ops Carbon Seatmast with Carbon Topper: D-shaped carbon seat mast & custom carbon topper.

CNC’d Titanium Componentry: Mosaic Designed one-piece titanium UDH dropout, NEW tapered IS52/IS52 headtube, D-Shaped BB Plug and the Seatmast Collar are all designed in-house & USA Made.

T47 BB / Full Internal Routing: Completely integrated cable housing from front to rear, utilizing a 68mm T47 BB

Titanium Finishwork: The RT-Zero Shadow Titanium layout highlights the titanium frame with painted carbon accents (seatmast, topper, stem, and fork).

Includes Integrated Enve Bars - SES Pro or SES AR. Painted to match.

Weight - Roughly 200g lighter than the RT-1. Frame weights will vary, but on average, this will be the lightest Mosaic model in our lineup.