Chapter2KOKO
Chapter2's top-tier aero road frameset, designed in New Zealand and named after the Māori word for 'to soar, fly'. It replaced the RERE in 2022 and adds Kamm-tail tube profiles, a latex-mandrel front triangle in Toray carbon, a T47 bottom bracket, 32 mm tyre clearance and a flip-over seat clamp that changes seatpost flex. It is sold as a frameset in limited-run colourways, with the one-piece MANA bar as an option or a standard stem.
- From
- €3,999$2,749£3,999
- Builds
- 1
- Sizes
- 5
- Frame weight
- 1,096 g2.42 lb
Design sketch, generated from the manufacturer's photo
Our verdict
No overall score: there's no complete-bike price to rate
A distinctive, limited-run aero frameset at a fair price, with 32 mm clearance, T47, a standard-stem option and tunable seatpost flex. It is a 2022 design with no published aero figures and a heavier frame (1,096 g) than the newest aero bikes, and it is only sold as a frameset.
Scored Oct 2026
AI-drafted from the specs on this page and reviewed before publishing. Scores are relative to every bike in the catalog when they were given, so they drop as newer bikes and parts raise the bar.
- Aero
- 76/100
- Frame
- 72/100
- Fit
- 78/100
- Practicality
- 76/100
Aero claims and front-end integration
Carbon grade, weight and warranty
Sizes and adjustment range
Travel, standard parts, servicing
Bike duel
Reviews
1 independent review of the Chapter2 KOKO.
- Written
Bicycling Australia
Test Ride: Chapter2 KokoPeter ManiatyTested: SRAM Force AXS build
Frame & platform
Frame & fork
- Frame material
- Carbon (Toray, made in Japan); latex-mandrel moulded front triangle
- Fork material
- Carbon
- Frame weight
- 1,096 g2.42 lb
- Fork weight
- 419 g14.8 oz
- Weight measured on
- Frame size M (±3%); fork uncut (±3%); seatpost 215 g (size M)
- Frame sizes
- XS, S, M, L, XL
- Colours
- White + Grey (Tauriparipa), Black + UD with Gold (Koura, Essential Edition), BRG + Yellow with Silver, Silver + UD (Ponga)
- UCI frame approval
- Approved 12 Mar 2021 as 'KOKO' (frame and fork), sizes XS-XL (5), code CHA2-KOKO (UCI list version 2026.10.02)
Compatibility & standards
- Brake type
- Disc only
- Max tire width
- 32 mm
- Bottom bracket standard
- T47 (86.5) internal
- Drivetrain compatibility
- Mechanical or electronic; Shimano Di2, SRAM eTap and Campagnolo EPS compatible
- Mechanical shifting possible
- Yes
- Cable routing
- Fully integrated (internal)
- Electronic battery location
- Takes Shimano SM-BTR2 or BT-DN300 and Campagnolo EPS V3 batteries
Fit & adjustability
- Cockpit
- Optional one-piece carbon MANA bar and stem, or a standard stem and handlebar; 1.5in C2 integrated headset
- Standard stem and bar possible
- Yes
- Seatpost type
- Chapter2 carbon seatpost, 10 mm setback, dual-position (invertible) seat clamp to tune compliance
- Fit notes
- 5 sizes for riders from 160 cm. The optional MANA5 one-piece cockpit comes in 12 sizes (80-120 mm stem, 405-449 mm at the drops) and the MANA2 in 6 sizes (80-130 mm, 380-435 mm); both have 70 mm reach, 128 mm drop and a -7° stem. Quick-Fit headset spacers.
Aerodynamics
- Manufacturer aero claims
- Chapter2 publishes no drag figures; it cites Kamm-tail profiles, integrated cabling and a rear-wheel cut-out in the seat tube
- Tube profile
- Kamm-tail (truncated aerofoil) down tube
Travel, maintenance & warranty
- Headset bearings
- 1.5in C2 integrated system
- Proprietary parts
- Seatpost and dual-position seat clamp; MANA one-piece cockpit (optional)
- Frame warranty
- Lifetime warranty (as stated on the product page)
- Sold via
- Direct from Chapter2 online (shipping and taxes included except in Japan and Canada) and through dealers
Photos
Design sketches
Builds & components
Highlighted rows differ between builds. Green marks the best value.
KOKO frameset | |
|---|---|
| Overview | |
| Price (MSRP) | €3,999$2,749£3,999 |
| Type | Frameset |
| Notes | Frame, fork, headset, seatpost, thru-axles and Quick-Fit spacers; handlebar not included (MANA bar is an add-on). Prices from Chapter2's USA, Europe and UK stores (Asia/international is also US$2,749); shipping and taxes included except in Japan and Canada. Each colourway is a limited run ('once sold out, never produced again'); on 2026-10-06 the BRG + Yellow colourway was shown at a sale price of US$2,099 and out of stock, the others in stock in XS-M (some L). Bicycling Australia's 2022 launch article listed A$5,199 (black) and A$5,499 (limited). |
| Cockpit | |
| Headset | Chapter2 C2 Integrated 1.5in |
| Saddle & seatpost | |
| Seatpost | Chapter2 KOKO seatpost |
| Offset / setback | 10 mm |
| Material | Carbon |
| Weight | 215 g7.6 oz |
| Notes | Weight for size M; dual-position seat clamp |
KOKO price & value
Where it's cheapest
MSRPs converted at ECB reference rates of 2026-10-05 (1 EUR = 1.1204 USD = 0.8472 GBP). US prices exclude sales tax, so add your state's rate before comparing.
| Build | Market | MSRP | In EUR | vs cheapest |
|---|---|---|---|---|
| KOKO frameset | USA (USD, excl. sales tax) | $2,749 | €2,454 | cheapest |
| Europe (EUR, incl. VAT) | €3,999 | €3,999 | +63% | |
| UK (GBP, incl. VAT) | £3,999 | €4,720 | +92% |
Building up the KOKO frameset
Included: Headset, Seatpost.
Still to buy: Groupset, Crankset, Cassette, Chain, Brake calipers, Wheelset, Tires, Handlebar, Saddle, Pedals.
Real-world weight
Scale weights of the KOKO from reviewers, next to Chapter2's claim.
| What | Measured | Claimed | Measured by |
|---|---|---|---|
| Complete bikeSize L · SRAM Force AXS build with 45 mm carbon wheels, bottle cages and out-front computer mount, without pedals | 7.95 kg17.5 lb | — | Bicycling Australia2024-11 |
Ownership checklist
2 of 2 known checks pass, 2 not published by Chapter2. Why these checks
- ✓
Threaded bottom bracket
T47 (86.5) internal
- ?
UDH derailleur hanger
- ?
Standard 12×142 mm rear axle
- ✓
Works with mechanical shifting
KOKO geometry
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Rider height min | 160 cm5′3″ | 165 cm5′5″ | 170 cm5′7″ | 175 cm5′9″ | 180 cm5′11″ |
| Rider height max | 170 cm5′7″ | 175 cm5′9″ | 180 cm5′11″ | 185 cm6′1″ | — |
| Stack | 491 mm19.3″ | 516 mm20.3″ | 540 mm21.3″ | 566 mm22.3″ | 591 mm23.3″ |
| Reach | 365 mm14.4″ | 374 mm14.7″ | 382 mm15″ | 392 mm15.4″ | 401 mm15.8″ |
| Seat tube angle | 73° | 73° | 73° | 73° | 73° |
| Head tube angle | 70.5° | 72.2° | 73.1° | 73.5° | 73.5° |
| Head tube length | 94 mm3.7″ | 114 mm4.5″ | 133 mm5.2″ | 163 mm6.4″ | 188 mm7.4″ |
| Effective top tube | 515 mm20.3″ | 531 mm20.9″ | 548 mm21.6″ | 564 mm22.2″ | 581 mm22.9″ |
| Seat tube length | 427 mm16.8″ | 447 mm17.6″ | 472 mm18.6″ | 497 mm19.6″ | 521 mm20.5″ |
| Chainstay | 408 mm16.1″ | 408 mm16.1″ | 408 mm16.1″ | 408 mm16.1″ | 408 mm16.1″ |
| Wheelbase | 970 mm38.2″ | 973 mm38.3″ | 971 mm38.2″ | 984 mm38.7″ | 1,000 mm39.4″ |
| BB drop | 73 mm2.9″ | 73 mm2.9″ | 73 mm2.9″ | 73 mm2.9″ | 73 mm2.9″ |
| Fork offset | 53 mm2.1″ | 53 mm2.1″ | 43 mm1.7″ | 43 mm1.7″ | 43 mm1.7″ |
| Front centre | 574 mm22.6″ | 576 mm22.7″ | 574 mm22.6″ | 587 mm23.1″ | 603 mm23.7″ |
| Standover | 708 mm27.9″ | 730 mm28.7″ | 755 mm29.7″ | 780 mm30.7″ | 805 mm31.7″ |
Side view
Drawn to scale (how to read it).
How the geometry rides
The KOKO in size M against the middle size of 65 other bikes: tendencies from geometry, not a ride review (how to read this).
- Wheelbase971 mm38.2″
shortestlonger than 0% of 65 bikeslongest
Short wheelbase: tends to feel more agile in corners and less planted on long straights.
- Front centre574 mm22.6″
shortestlonger than 0% of 29 bikeslongest
Short front centre: more weight on the front wheel, which can make the front feel lighter to steer.
- Chainstay408 mm16.1″
shortestlonger than 27% of 73 bikeslongest
Good to know
Fit
Inverting the seat clamp moves the seatpost's anchor point lower, effectively lengthening the post by around 5-7 cm; Chapter2 says this adds up to 8.5% compliance.
SourceCompatibility
Rear brake caliper mount on the chainstay is 25 mm thick in all sizes; maximum tyre size 32 mm.
SourceHistory
The KOKO launched in early 2022 as a refined, updated RERE, Chapter2's earlier aero road frame. Chapter2 claims the Kamm-tail down tube makes the bottom bracket 13.35% and the head tube 35.64% stiffer than the RERE.
SourceVersions
Chapter2's frame specs list six sizes (XXS to XL), as did the 2022 launch coverage, but the geometry chart, the shop and the UCI listing only have XS to XL; XXS is left out here.
Source
KOKO FAQ
Is the Chapter2 KOKO UCI legal?+
Yes. The Chapter2 KOKO is UCI legal, so it can be raced in UCI-sanctioned road races.
How much does the Chapter2 KOKO cost?+
Manufacturer prices (MSRP): €3,999 / $2,749 / £3,999 across 1 listed build: KOKO frameset.
How much does the Chapter2 KOKO weigh?+
The frame weighs 1,096 g (2.42 lb) (Frame size M (±3%); fork uncut (±3%); seatpost 215 g (size M)).
What sizes does the Chapter2 KOKO come in?+
5 sizes: XS, S, M, L and XL. The manufacturer recommends them for riders from 160 cm (5′3″) to 185 cm (6′1″).
What is the tire clearance of the Chapter2 KOKO?+
Up to 32 mm tires.
Which groupsets are compatible with the Chapter2 KOKO?+
Drivetrain compatibility: Mechanical or electronic; Shimano Di2, SRAM eTap and Campagnolo EPS compatible. Mechanical shifting can be fitted. Bottom bracket: T47 (86.5) internal.
What warranty does the Chapter2 KOKO frame have?+
Lifetime warranty (as stated on the product page)
Is the Chapter2 KOKO aerodynamic?+
Chapter2 publishes no drag figures; it cites Kamm-tail profiles, integrated cabling and a rear-wheel cut-out in the seat tube
Sources
- https://www.chapter2bikes.com/product-category/framesets/aero-road/koko
- https://www.chapter2bikes.com/product/details/628
- https://www.chapter2bikes.com/product/koko-black-ud-gold-koura
- https://www.chapter2bikes.com/product/koko-brg-yellow-silver
- https://www.chapter2bikes.com/product/details/815
- https://uk.chapter2bikes.com/product/details/628
- https://assets.ctfassets.net/761l7gh5x5an/7jA9krKzzy3lRXPzlm4uyn/7982d7114b9d62978cb87876ea476535/58780c70-6247-4448-8384-b145fa30aba9.pdf
- https://bicyclingaustralia.com.au/bikes/first-look-new-koko-aero-bike-from-chapter2/
- https://bicyclingaustralia.com.au/bikes/test-ride-chapter2-koko/
Chapter2 KOKO data last updated · How the data is checked ·