Partington is proud to be a launch partner of the all-new Mosaic RT-Zero road bike. The RT-Zero represents the pinnacle of Mosaic’s engineering — blending proprietary Zero Ops carbon innovation with handcrafted titanium. The result is a bike that pushes the limits of titanium fabrication, integration, and design, delivering a truly unique fusion of cutting-edge technology and artisanal craftsmanship.
Details from Mosaic:
Born from Mosaic’s Zero Ops program, the RT-Zero builds on the proven performance of our iconic RT-1 with elevated sophistication, refinement, and ride quality. At its core is our own in-house engineered carbon seat mast and topper—proudly made in the USA—a hallmark of Mosaic’s commitment to durability and precision. This D-shaped Zero Ops mast uses a truncated airfoil, or ‘Kamm-tail,’ profile that reduces aerodynamic drag and, more importantly, lets us fine-tune stiffness and compliance in ways a round tube cannot.
The RT-Zero carries forward the RT-1 ITR’s 700x35mm tire clearance and balanced geometry—light, stiff, and responsive yet stable and predictable on descents. This is a Made-to-Order model with rider-specific tubing, so frame weights vary, but on average this is the lightest Mosaic model to date.
On the road, 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 seat mast create an exceptionally stiff bottom bracket and near-instantaneous power transfer. Building on that rigid foundation, the carbon seat mast 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.
The RT-Zero is the first model by Mosaic Zero Ops, the result of over 15 years of titanium frame fabrication combined with countless hours of in-house dreaming, development and testing of these enhancements in the pursuit of the ultimate Mosaic…so far.
A limited production run of 25 first edition RT-Zero framesets, hand-finished with exclusive Zero Ops paint options will be available to order in 2025. The pre-order window is open from September 1st through November 30th, with RT-Zero deliveries beginning in February of 2026. Contact your Mosaic Dealer to secure an RT-Zero slot today of contact us below, then we’ll get to work on perfecting your RT-Zero.
Partington is a proud launch partner of the Mosaic RE-Zero. Partington wheelsets (39/44 or 31/31) can be specified with the frame at the time of order. To find out more about the Mosaic RT-Zero.
To find out more about Mosaic bikes, go here Mosaic Cycles. To discover more about Partington wheelsets, go here R-SERIES MKII R39/44