RIRA 
ULTRA 

CHAPTER2 - RIRA ULTRA - UD + GOLD

The RIRA Ultra is our flagship, high-performance racing frameset—engineered for riders who demand the absolute best. Built on the proven RIRA Geometry and aero-optimized to slice through wind resistance, every curve and contour is tuned for maximum speed and efficiency.

Weighing just 695g (Size M ±3%), the Ultra is meticulously crafted from over 300 layers of precision-placed Toray carbon in custom molds. The result? A razor‑sharp chassis that delivers blistering responsiveness and race-winning performance.

ABOUT THE FRAME 

Whether you’re a pro or a dedicated enthusiast, every gram has been meticulously optimized - without sacrificing stiffness or ride quality.

For climbers, sprinters, and racers alike, its aggressive-yet-balanced geometry and agile handling elevate every turn into a heart-pounding moment. With a headturning silhouette, it makes a statement whether you’re leading the pack or chasing a new PB.

Fit and compatibility are race-day ready too:  the EVO386 bottom bracket platform supports a wide range of cranksets, and the 27.2 mm seatpost lets you fine-tune fit - or swap in the ultra‑light 219 g C2 TUMU Seatpost to go all-in.

Designed exclusively for electronic groupsets, the RIRA Ultra includes both SRAM UDH and Shimano Direct-mount hangers. And with clearance for 32 mm rear and 34 mm front tyres, it handles rough roads as confidently as it dominates the racecourse.
This isn’t just lightweight — it redefines what lightweight can be.

SPECIFICATIONS

FRAME WEIGHT: 695g (Size M) +/- 3%
FORK WEIGHT: 395g (uncut) +/- 3%
GROUPSET COMPATIBILITY: Electronic only
DERAIILEUR MOUNT: SRAM UDH/Shimano Direct-Mount
BB TYPE: EVO386 Press-Fit
TYRE CLEARANCE: 32mm (Frame) / 34mm (Fork)

WHAT YOU GET 

Frame
Fork
Headset
Thru-Axles
Quick-Fit Spacers

OPTIONAL (not included with frameset):
MANA5 Bar - Please view options here.
Tumu Seatpost

DELIVERY TIMEFRAME

Your frameset will be shipped directly to you from Chapter2's warehouse facility in Hong Kong via DHL, with Wide Open handling all aspects of the delivery process. All prices include shipping costs. Please allow 1-2 weeks for delivery from the time of placing your order.

EXCLUSIVE BRAND,

WITH A BOUTIQUE BIKE SPIRIT.

CHAPTER2 is an exclusive brand with a boutique spirit, crafting framesets for discerning individuals who believe the process of creating a personal statement is as important as building their dream bike.

At the heart of CHAPTER2, we find the extraordinary and diverse nature of New Zealand sculpted in each frame design. This earth is inhabited by 1,000 years of Maori heritage known for its legendary warrior spirit, which is our soul, our inspiration, our why. CHAPTER2 bikes use Japanese-made Toray® carbon fibre exclusively and have all been fully tested at Auckland University’s Wind Tunnel, the same facility where Emirates Team NZ (America’s Cup) does their testing.

RIDE YOUR NEXT CHAPTER.  

CHAPTER2 - RIRA ULTRA - UD + GOLD

GEOMETRY