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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 KOKO Aero Frameset

The Chapter2 KOKO aero frameset is CHAPTER2’s top-tier aero road chassis: Kamm-Tail tube profiles, fully integrated cabling, and a serviceable T47 (86.5) BB create a fast, stiff platform that still rides smooth. Adjustable compliance via a dual-position seatclamp, up to 32 mm tire clearance, and vibration-damping stays/post deliver real-world speed on imperfect roads. Mechanical and electronic compatible, UCI-approved.

Chapter2 KOKO Aero Frameset — Features & Benefits

Aero Kamm-Tail shaping: Down-tube profiles boost stiffness (BB/HT) and cut drag.
Integrated cable routing: Clean aesthetics and reduced turbulence.
Dual-position seatclamp: Switch between stiffer or more compliant ride feel.
Vibration-damping stays & post: Comfort and control at race speeds.
Tire clearance: Up to 32 mm for wider, lower-pressure race setups.
T47 (86.5) bottom bracket: Quiet, stiff, easy to service.
UCI-approved: Race-legal and tested to EN ISO 4210:2014.

Chapter2 KOKO aero road bike in black and gold

Chapter2 KOKO Frameset — Specifications

Frame Specs

Carbon: Toray, 100% made in Japan
Sizes: XXS, XS, S, M, L, XL
Frame Weight: ~1,096 g (M, ±3%)
Fork Weight: ~419 g (uncut, ±3%)
Seatpost Weight: ~215 g (M, ±3%)
Bottom Bracket: T47 (86.5 internal)
Axles/Brakes: Disc-only; 12×100 (F) / 12×142 (R)
Headset: 1.5" C2 Integrated System
Shifting: Mechanical & Electronic (Di2/eTap/EPS)
Tire Clearance: up to 32 mm
Safety/UCI: EN ISO 4210:2014; UCI-approved

Included with the Frameset

Frame & Fork
Headset & Quick-Fit spacers
Seatpost
Thru-axles
Installation diagram & small parts

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 KOKO Frameset — Geometry

Size	XS	S	M	L	XL
Stack (mm)	491	516	540	566	591
Reach (mm)	365	374	382	392	401
A Top Tube (mm)	515	531	548	564	581
B Head Tube (mm)	94	114	133	163	188
C Seat Tube Angle (°)	73	73	73	73	73
D Head Tube Angle (°)	70.5	72.2	73.1	73.5	73.5
E Seat Tube (mm)	427	447	472	497	521
F BB Drop (mm)	73	73	73	73	73
G Rear Centre (mm)	408	408	408	408	408
H Wheelbase (mm)	970	973	971	984	1000
I Front Centre (mm)	574	576	574	587	603
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.