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Chapter2 Rira Ultra Gold Frameset Side View

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Chapter2 Rira Ultra Gold Frameset Front Angled View

Chapter2 Rira Ultra Gold Frameset Cockpit View

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Framesets CHAPTER2

Chapter2 RIRA Ultra

Name: Chapter2 RIRA Ultra
Brand: CHAPTER2
Price: 3449.00 USD
Availability: InStock

$3,449.00 USD

0 products in stock

The RIRA Ultra’s ultra-light chassis delivers a clear advantage on steep climbs and accelerations, while its race geometry provides precise control on high-speed descents and technical corners. The EVO386 bottom bracket reduces weight yet preserves stiffness for maximum power transfer when it matters.
Clearance for 34 mm front / 32 mm rear tyres lets you run wider, lower-pressure setups for more grip, comfort, and confidence on rough roads. And with SRAM UDH included, 1× Transmission builds are fully supported — giving you a cleaner, quieter, more robust drivetrain for aggressive racing and minimal maintenance

Customer Support Our dedicated team is always here to help with sizing, builds, and orders.

Warranty Protected Lifetime frame & fork warranty

Shipping Included Included on most components and wheelsets. Free on orders over $100. Worldwide delivery with tracking.

Rider Approved We test and ride what we sell. Every product is hand-selected for quality and performance.

Chapter2 RIRA Ultra

The Chapter2 RIRA Ultra is their flagship race chassis: a superlight 695 g (M) Toray carbon frame, aero-tuned RIRA geometry, and modern standards throughout. Built for electronic-only drivetrains, EVO386 stiffness at the BB, and real-world speed with clearance up to 34 mm front / 32 mm rear tires. Supplied with both SRAM UDH and Shimano Direct-Mount hangers for maximum drivetrain flexibility.

Chapter2 RIRA Ultra — Features & Benefits

Featherweight frame: ~695 g (size M) with high-grade Toray layup for race-day acceleration.
Aero-tuned RIRA shaping: Surfaces and profiles optimized to reduce drag at typical road yaw.
Electronic-only: Di2/eTap/EPS routing for a clean, future-proof build.
EVO386 BB platform: Broad shell for power-transfer stiffness and reliable alignment.
Disc-only, flat-mount: Confident braking with 12×100 / 12×142 thru-axles.
Real-world clearance: Up to 34 mm front / 32 mm rear tires for fast, rough tarmac.
Hanger flexibility: Includes SRAM UDH and Shimano DM derailleur hangers.

Chapter2 RIRA Ultra — Specifications

Frame Specs

Material: Toray carbon (high-modulus layup)
Frame Weight: ~695 g (M, ±3%)
Fork Weight: ~395 g (uncut, ±3%)
Bottom Bracket: EVO386 press-fit
Seatpost: 27.2 mm round (C2 “Tumu” optional)
Brake Mount: Flat-mount disc
Axles: 12×100 (F) / 12×142 (R)
Tire Clearance: 34 mm (front) / 32 mm (rear)
Shifting: Electronic only (Di2 / eTap / EPS)
Certifications: EN ISO 4210; UCI-approved

Included with the Frameset

Frame & Fork: RIRA Ultra frame and matching fork
Hangers: SRAM UDH & Shimano Direct-Mount
Headset & Small Parts: headset, spacers, axles, grommets, hardware
Seatpost: 27.2 mm round (clamp hardware included)
Warranty: Manufacturer warranty (see brand terms)

Torque Specs

Saddle Rail: 6 Nm
Seatclamp: 8 Nm
Stem (Steerer): 6 Nm
Stem (Handlebar): 6 Nm
Front Derailleur Hanger: 3 Nm
Rear Derailleur Hanger: 2 Nm
BB Cable Guide Cover: 1 Nm
Thru-Axle: 10 Nm
Water Bottle Cage Bolts: 3 Nm

Chapter2 RIRA Ultra — Geometry

Size	XS	S	M	L	XL
Stack (mm)	489	517	545	573	601
Reach (mm)	361	371	381	391	401
A Top Tube (mm)	502	520	538	555	574
B Head Tube (mm)	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 (mm)	430	450	470	500	530
F BB Drop (mm)	74	73.5	73	72.5	72
G Rear Centre (mm)	410	410	410	410	410
H Wheelbase (mm)	972	974	975	982	1001
I Front Centre (mm)	574	576	574	584	602
J Fork Offset (mm)	53	53	43	43	43

All dimensions in millimeters unless noted (°).

CHAPTER2 Mana5 integrated cockpit with labeled A, B, C dimensions — Geometry reference: A (stem length), B (width at drops), C (width at hoods).

CHAPTER2 Mana5 Integrated Cockpit — Geometry & Sizes

A = Stem length (mm)
B = Width at Drops (mm)
C = Width at Hoods (mm)

B/C Width Options

Size label	B — Drops (mm)	C — Hoods (mm)
405 / 355	405	355
416 / 366	416	366
427 / 377	427	377
438 / 388	438	388
449 / 399	449	399

A — Stem Lengths

80 | 90 | 100 | 110 | 120

B — Drops Widths

405 | 416 | 427 | 438 | 449

C — Hoods Widths

355 | 366 | 377 | 388 | 399

*Multiple factory combinations are available (e.g., 80×405, 90×416, 100×427, 110×438, 120×449, etc.). Stem angle −7°, reach 70 mm, drop 128 mm across sizes.