Chapter2 RIRA Frameset
The RIRA is CHAPTER2’s all-road race platform—fast on tarmac with room for 32 mm rubber when the route turns rough. Balanced geometry (XS–XL), fully integrated front-end options via the MANA5 cockpit, and road-disc stopping power make it a confident, versatile chassis for modern all-road builds.
Chapter2 RIRA — Features & Benefits
- All-Road Speed: Race-bias geometry with stable manners on broken pavement.
- Modern Integration: Clean routing and MANA5 cockpit compatibility for a low-drag front end.
- Real-World Clearance: Fits up to 32 mm tires to smooth out chipseal and rough roads.
- Road-Disc Confidence: Flat-mount calipers (25) with 12×100 / 12×142 thru-axles.
- Size Run: XS–XL with proportional front-center and fork offsets for consistent handling.
Chapter2 RIRA — Specifications
Frame Specs
- Carbon: 100% Toray (Japan)
- Sizes: XS, S, M, L, XL
- Fork Rakes: XS/S = 53 mm; M/L/XL = 43 mm
- Frame Weight: ~945 g (M, ±3%)
- Fork Weight: ~395 g uncut (±3%)
- Seatpost (sold separately): TUMU ~219 g (±3%)
- MANA2 / MANA5 bar (sold separately): ~330 g (±3%)
- Headset: 1.5" C2 Integrated
- Shifting: Electronic-only — Di2 / eTap / EPS compatible
- Battery: Di2 SM-BTR-2 or BT-DN300; EPS V3 compatible
- Tire Clearance (simplified): fits up to 32 mm real-world
- Tire Clearance (technical): Front 32 mm (ISO) / 34 mm practical; Rear 30 mm (ISO) / 32 mm practical
- Brake / Axles: Disc-only, flat-mount; 12×100 (F) / 12×142 (R)
- Bottom Bracket: Internal T47 (85.5)
- Derailleur Hanger: SRAM UDH (M12×1 mm)
- Safety / UCI: EN ISO 4210:2014; UCI approved
Included with the Frameset
- Frame
- Fork
- Headset
- Thru-Axles
- Quick-Fit Spacers
- SRAM XDR Hanger
- Shimano Direct-Mount Hanger
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 — Geometry
| 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 |
All dimensions in millimeters unless noted (°).
CHAPTER2 MANA5 Integrated Cockpit — Geometry & Sizes
Helpful Links
Compare RIRA geometry to other bikes on Geometry Geeks.
Browse compatible carbon wheelsets.
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