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.