The RIRA Ultra is our flagship high-performance racing frameset—engineered for riders who demand uncompromising speed, precision, and race-day readiness. Built on our proven RIRA Geometry and fine-tuned for aerodynamics. Every surface, edge, and profile is designed to reduce drag and enhance efficiency across all terrains.
Weighing just 695 g (Size M ±3%), the Ultra is meticulously constructed from over 300 layers of high-grade Toray carbon, strategically laid into custom moulds for optimal strength-to-weight ratio. The result is a feather- light chassis that reacts instantly to every watt you put down, delivering blistering responsiveness on climbs, sprints, and technical descents alike.
From the first pedal stroke to the final sprint, the RIRA Ultra brings pro-level performance within reach. Its aggressive-yet-balanced geometry provides nimble handling through corners and confident stability at high speed. Every gram has been shaved without compromising stiffness or ride quality, ensuring it feels fast and composed under maximum load. Whether you're attacking the breakaway, chasing a personal best, or hunting podiums, the Ultra is your ultimate weapon.
Aesthetically, the Ultra’s silhouette is clean, sculpted, and undeniably fast—turning heads whether you're leading the pack or out on a solo mission. It’s designed to be as functional as it is beautiful. The EVO386 bottom bracket platform provides compatibility with a broad range of cranksets, and the 27.2 mm seatpost diameter allows riders to fine-tune fit and comfort—or go all-in on weight savings with the 219 g C2 TUMU Seatpost.
Built exclusively for electronic drivetrains, the RIRA Ultra includes both SRAM UDH and Shimano Direct-Mount hangers for seamless setup across groupsets. Tyre clearance of 32 mm at the rear and 34 mm at the front ensures confident handling on rougher roads, cobbles, or broken tarmac—giving you race-level performance in real-world conditions.
The RIRA Ultra isn’t just about being light. It’s about redefining what lightweight can do. Engineered to push boundaries and built to win, it’s the purest expression of speed we’ve ever created.
Optimised for Real-World Racing Performance
The RIRA Ultra’s ultra-light chassis gives you a clear advantage on steep climbs, helping you conserve energy and attack with confidence. Its race-tuned geometry ensures precise handling and stability on high-speed descents and technical corners—so you can ride faster, safer, and with complete control.
The proven EVO386 bottom bracket further reduces mass whilst ensuring maximum power transfer with every pedal stroke. It’s built for riders who demand efficiency without compromise.
With clearance for 34 mm front and 32 mm rear tyres, you gain the flexibility to run wider, lower-pressure tyres for better grip, comfort, and control—especially on rough or unpredictable roads.
And for those building a 1x setup, the SRAM UDH (Universal Derailleur Hanger) opens the door to SRAM’s cutting-edge Transmission system. This means you can create a cleaner, simpler, and more robust drivetrain that’s perfect for aggressive racing, minimal maintenance, and maximum performance.
In a world where every new bike launch is accompanied by lofty claims of “fastest bike in the world” or “save X watts over a 40km/hr solo ride” etc. it would be easy to forget that cycling is about the senses, the beauty of suffering up a massive col, then dipping into a valley with the surroundings flashing by as if you’re travelling through time.
The RIRA is all about the “touchy, feely” side of cycling. Whilst the svelte weight and the carefully dialled stiffness to weight ratio matters to our product team who geek out over Toray T1100 grade specifications, fibre orientation and watts saved etc., it’s what we deliver to your soul that matters to us most.
With the RIRA, we got back to basics. A razor-sharp focus on balance and agility that is sure to raise your pulse, and if that wasn’t enough, it has the looks that will certainly turn a few heads when you rock up to your local bunchie or put the power down to capture your PB.
The RIRA sports a T47 85.5 BB Standard that is quickly becoming the default standard for high tolerance and stiffness, as well as offering many BB and Crankset options in the market. By using a standard 27.2mm Seatpost, you can really dial in your bike fit as well as target weight. Of course, you can also choose the optional C2 TUMU Seatpost at 219g to get the full C2 experience.
The RIRA frameset comes with Sram UDH Hanger and Shimano Direct Mount Hnager and is only compatible Electronic Groupsets. The chassis and fork accommodate tires up to 32mm in the rear and 34mm in the front, ensuring a smooth and fast ride, so you will have ample room for high volume tires for the fast and plush ride quality.
Note:
All dimensions are in mm unless otherwise noted
| RIRA ULTRA | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Stack | 489 | 517 | 545 | 573 | 601 |
| Reach | 361 | 371 | 381 | 391 | 401 |
| A. Top Tube | 502 | 520 | 538 | 555 | 574 |
| B. Head Tube | 90 | 112 | 135 | 161 | 191 |
| C. Seat Tube Angle | 74° | 74° | 74° | 74° | 74° |
| D. Head Tube Angle | 70° | 72° | 73° | 74° | 74° |
| E. Seat Tube | 430 | 450 | 470 | 500 | 530 |
| F. BB Drop | 74 | 73.5 | 73 | 72.5 | 72 |
| G. Rear Centre | 410 | 410 | 410 | 410 | 410 |
| H. Wheelbase | 972 | 974 | 975 | 982 | 1001 |
| I. Front Centre | 574 | 576 | 574 | 584 | 602 |
| J. Fork Offset | 53 | 53 | 43 | 43 | 43 |
| K. Seatpost Setback | NA | NA | NA | NA | NA |
| Stem | NA | NA | NA | NA | NA |
| Stand over | 721 | 744 | 768 | 799 | 827 |
| Rider Height | <170 | 165-175 | 170-180 | 175-185 | >180 |
| Max. Tire Size | 32 | 32 | 32 | 32 | 32 |
| Rear Caliper Mount | 25 | 25 | 25 | 25 | 25 |
Note: All dimensions are in mm unless otherwise noted. |
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| Size | 80x405 | 80x416 | 90x405 | 90x416 | 90x427 | 100x416 | 100x427 | 100x438 | 110x427 | 110x438 | 110x449 | 120x449 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A. Stem | 80 | 80 | 90 | 90 | 90 | 100 | 100 | 100 | 110 | 110 | 110 | 120 |
| B. Width at Drops | 405 | 416 | 405 | 416 | 427 | 416 | 427 | 438 | 427 | 438 | 449 | 449 |
| C. Width at Hoods | 355 | 366 | 355 | 366 | 377 | 366 | 377 | 388 | 377 | 388 | 399 | 399 |
| D. Reach | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 |
| E. Drop | 128 | 128 | 128 | 128 | 128 | 128 | 128 | 128 | 128 | 128 | 128 | 128 |
| F. Stem Angle | -7.0° | -7.0° | -7.0° | -7.0° | -7.0° | -7.0° | -7.0° | -7.0° | -7.0° | -7.0° | -7.0° | -7.0° |
| Size | 80x380 | 90x391 | 100x402 | 110x413 | 120x424 | 130x435 |
|---|---|---|---|---|---|---|
| A. Stem | 80 | 90 | 100 | 110 | 120 | 130 |
| B. Width at Drops | 380 | 391 | 402 | 413 | 424 | 435 |
| C. Width at Hoods | 360 | 371 | 382 | 393 | 404 | 415 |
| D. Reach | 70 | 70 | 70 | 70 | 70 | 70 |
| E. Drop | 128 | 128 | 128 | 128 | 128 | 128 |
| F. Stem Angle | -7.0° | -7.0° | -7.0° | -7.0° | -7.0° | -7.0° |
