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RIRA - SRAM RIVAL ETAP AXS

$8,990.00
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Chapter2 RIRA Complete Bike – Precision Performance, Inspired by the Ride

The Chapter2 RIRA Complete Bike with SRAM Rival eTap AXS delivers pure road performance, precision handling, and an exhilarating ride feel at an accessible level. Designed for racers, endurance riders, and performance-focused enthusiasts, this build combines Chapter2’s world-class carbon engineering with proven electronic shifting and aerodynamic efficiency to create a bike that thrives on speed and responsiveness.

Built from 100% Toray carbon fiber in Japan, the RIRA frame and fork are meticulously designed for explosive power transfer and aerodynamic efficiency, ensuring maximum responsiveness in every pedal stroke. The fully integrated MANA5 cockpit provides a sleek, cable-free setup, optimizing airflow while offering customizable width and length options for the perfect fit. The TUMU carbon seatpost and TCP 3D-printed carbon saddle round out the cockpit, delivering exceptional comfort and stability on long rides and aggressive race efforts.

SRAM Rival eTap AXS – Smooth, Wireless Shifting

The SRAM Rival eTap AXS 12-speed drivetrain offers seamless, wireless electronic shifting, delivering crisp, precise gear changes with minimal effort. The 1:1 ratio 10-30T or 10-36T cassette, paired with 33/46T or 35/48T chainrings, provides an efficient gear range for climbing, sprinting, and everything in between. The Rival hydraulic disc brakes with SRAM Centreline rotors (140mm or 160mm) ensure reliable stopping power in all conditions, whether you’re attacking a descent or navigating tight corners in a criterium.

UNAAS HARD2 Carbon Wheels – Aero Meets Stability

To complement the RIRA’s race-focused geometry, this build features the UNAAS HARD2 50mm carbon wheelset, offering the perfect balance of aerodynamic speed and crosswind stability. Wrapped in Goodyear Eagle F1 R tires (700x28c or 700x30c, available in black or tan wall), this setup delivers outstanding grip, low rolling resistance, and confidence-inspiring handling across varied road conditions.

Whether you’re lining up for your first road race, chasing a personal best, or pushing the limits of endurance riding, the RIRA Complete Bike with SRAM Rival eTap AXS provides the perfect blend of performance, technology, and rideability.

Key Specifications

  • Frame & Fork: Chapter2 RIRA Carbon – 100% Made in Japan by Toray
  • Cockpit: MANA5 Integrated Handlebar/Stem (Customizable Length + Width), Chapter2 Black Bar Tape
  • Drivetrain: SRAM Rival eTap AXS 12-speed (33/46 or 35/48 Crankset + 10-30 or 10-36 Cassette)
  • Brakes: SRAM Rival Hydraulic Disc, SRAM Centreline Rotors (140mm or 160mm)
  • Wheels: UNAAS HARD2 Carbon Wheelset – 50mm
  • Tyres: Goodyear Eagle F1 R (700x28c or 700x30c) – Black or Tan Wall
  • Bottom Bracket: Wishbone Ceramic T47 Inboard
  • Saddle & Seatpost: TCP 3D Printed Carbon Saddle, Chapter2 TUMU 27.2mm Carbon Seatpost
The RIRA Complete Bike with SRAM Rival eTap AXS is built to deliver speed, efficiency, and confidence, making it the ideal choice for riders looking for electronic shifting and aerodynamic performance in a competitively priced package.
BIKE SPECIFICATIONS

FRAME: Chapter2 RIRA Carbon: 100% Made in Japan by Toray
FORK: Chapter2 Carbon: 100% Made in Japan by Toray
HANDLEBAR/STEM: Chapter2 MANA5 Integrated (Choose your length + width)
TAPE: Chapter2 Black Bar Tape
SADDLE: TCP 3D Printed Carbon Saddle
SEATPOST: Chapter2 Carbon TUMU 27.2mm
FRONT BRAKE: SRAM Rival
REAR BRAKE: SRAM Rival
SHIFT LEVERS: SRAM Rival eTap AXS
FRONT DERAILLEUR: SRAM Rival eTap AXS
REAR DERAILLEUR: SRAM Rival, 12-speed
CHAIN: SRAM Rival
CASSETTE: SRAM Rival (10-30 or 10-36)
CRANKSET: SRAM Rival (33-46 or 35-48) + (165, 170, 172.5 or 175mm)
BOTTOM BRACKET: Wishbone Ceramic T47 Inboard
FRONT WHEEL: UNAAS HARD2 Wheelset - 50mm
REAR WHEEL: UNAAS HARD2 Wheelset - 50mm
ROTORS: SRAM Centreline Rotor (140 or 160mm)
TYRES: Goodyear Eagle F1 R - (700x28c or 700x30x) + (Black or Tan Wall)

ABOUT THE FRAME

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.

FEATURES/BENEFITS

The sleek 950g RIRA Form Factor has all the trademarks of a modern race frameset, such as a T47 85.5 BB for added stiffness and maximum BB/Crankset compatibility. The slender waistline of the headtube carefully manages the airflow to minimise drag, creating a slippery silhouette that delivers

Each frameset comes with a Sram UDH Hanger as well as a Shimano Direct Mount Hanger allow maximum shifting performance with both Gruppo Manufacturers.

In a world of bespoke Seatposts, C2 are bucking the trend by engineering the RIRA specifically for the round 27.2 Seatpost so you can select the best post in the market that suits your needs, including the 219g C2 TUMU 0mm Setback post.

TORQUE SPECS
Seatclamp
8-10Nm
Thru-Axle
3-4Nm
Rear Derailleur Hanger
3-4Nm
Water Bottle Cage Bolts
2-3Nm
Thru-Axle
10Nm
MANA
6Nm

CUSTOMISABLE AT NO EXTRA COST

Unlike most bike brands where you are left paying extra for switching out stem length, handle bar width, tyre width, cassettes, chain ring size and crank length we can tailor build the bike to your preferences.

Choose the following preferences:

  • MANA5 handlebar size (available in 12 sizes)
  • Cassette
  • Chainring
  • Crank length
  • Tyre width

MANA5 Aero Bar Innovation

Whilst we have been busy dialling in the ride characteristics of the RIRA, we have also reimagined the cockpit. The MANA which was first launched in 2019 has gone through some subtle tweaks over the years to ensure it continues to deliver a confidence inspiring steering system, including allowing for fully integrated cabling.

With this fifth iteration, we are stoked to present the newly sculpted MANA5, now available in 12 sizes to ensure you get the bike fit that works perfectly with your C2 Frameset. The MANA5 also has up to 25mm of flare each side, giving you that aero optimised position.

Additionally the MANA5 is also backwards compatible with all C2 Integrated and Non-Integrated framesets and because it’s designed for circular 1-1/8” steerer, it also works with most bikes in the market, giving you the ultimate performance upgrade to any bike.

Learn More
FEATURES

BIKE FIT OPTIONS - CAN BE USED WITH MANA - OR WITH STANDARD STEM

27.2MM STANDARD SIZE SEATPOST FOR MAXIMUM BIKE FIT OPTIONS

FULLY INTEGRATED CABLING - IMPROVED AERODYNAMICS - CLEAN AND SLEEK AETHETICS

SRAM UDH REAR HANGER COMPATBILITY AND UP TO 32MM TIRE CLEARANCE

T47 85.5 BB WITH SRAM UDH AND SHIMANO DIRECT MOUNT HANGER OPTIONS

ASYMMETRIC SEATTUBE TO MAXIMISE BOTTOM BRACKET STIFFNESS
SIZE GUIDE
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FRAME GEOMETRY

Note:

All dimensions are in mm unless otherwise noted

RIRA 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.
MANA5
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°
MANA2
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°