Mosaic RT-Zero Frameset
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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.
Mosaic's bikes are heavily impacted by the environment that they live, work, and ride in — Colorado, and specifically Boulder. It is a fantastic place to ride. Demanding of both the rider and of their equipment. There’s high speed pavement, steep gravel roads and almost endless alpine singletrack. That's where they spend their time, and they craft products that are perfectly suited to the riding they like to do.
Mosaic builds bikes for specific individuals Heck, it’s in their name: ”Mosaic Bespoke Bicycles”. They encourage you to take your time, work with a dealer to dial in your fit, and then let them build you perfect bike for you, and only you. Rather than make something work off the shelf, let’s start from square one, and get it right. It’s worth it.
Rider-specific custom geometry is included at no additional cost on any 1-Level Mosaic frame. We take bike fit data provided by your Mosaic Dealer, then design a custom frame draft to hit your fit and handling preferences absolutely perfectly.
Why titanium?
Titanium is an excellent material to create a bicycle frame from for several reasons. It’s incredibly durable – a new Mosaic will ride as well 20 years down the road as it does the day it’s first built up. Titanium tubing lends itself to the production process of utilizing a rider specific tubeset to achieve the perfect fit, ride quality and aesthetic for each rider. Titanium creates a ride feel that’s unique and highly enjoyable. It’s incredibly smooth, yet it’s fast, light and responsive.
Our prices match the prices you might see on any brand's website, and our delivery times are roughly the same as theirs.
However, our opinion regarding the right bike or component for you might vary, because we are here to put you on the right product for you, not just the only one we sell. So, the price is the same, no matter where you purchase, but when you purchase through us, you get:
- An objective opinion on fit and if the bike suits your needs.
- A professional build, which ensures safety. If there is an issue, we can promise you that 99 out of 100 times, it will be resolved quicker than you can in your garage.
- A build history that becomes a service history, ideally. That can be very helpful if you do have any sort of warranty issue.
- Enthusiastic attention when you come to the store. We won't lie, bikes bought from us get preferential service scheduling.
