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2025 Kona Ouroboros

Original specifications: geometry for 6 published sizes.

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At a glance

Model year
2025
Category
Gravel & Cyclocross
Original MSRP
$2,099.00
Sizes
48, 50, 52, 54, 56, 58
Colors
Gloss Metallic Turismo Olive w/ Porsche Olive Decals
Geometry
6 manufacturer sizes
In this record
20 specifications · 8 archived images · original MSRP · geometry
Archive ID
900001002
Original buildAluminum

Manufacturer catalog

Published sizes and colors

6 sizes · 1 color

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

485052545658

Published colors

Gloss Metallic Turismo Olive w/ Porsche Olive Decals

Frameset

Frame ConstructionKona 6061 Aluminum Butted
Frame MaterialAluminum
ForkSuntour GVX32 40mm travel, Tapered, 100x12mm

Drivetrain

ShiftersMicroshift Sword left dropper/brake and right brake/shifter
Rear DerailleurMicroshift Sword Long Cage w/Clutch
CranksetMicroshift Sword; Chainring: 40t 10sp narrow-wide
Bottom BracketProwheel PF86.5
CassetteMicroshift Sword 11-48t 10spd
ChainKMC X10

Brakes

BrakesBrake Calipers: TRP Spyre C; Front Brake Rotor: TRP 180mm; Rear Brake Rotor: TRP 180mm; Brake Levers: Microshift Sword

Cockpit & Contact Points

HeadsetFSA No.57B
HandlebarKona Gravel 20-degree flare, 48: 440mm; 50: 460mm; 52-54: 480mm; 56: 500mm; 58: 520mm
StemKona Gravel 6-degree rise, 48-52: 50mm; 54-58: 60mm
SaddleWTB Volt
SeatpostTranzX Dropper +RAD Internal 31.6mm 125mm travel

Wheels & Tires

Hubs(F) Formula 100x12mm 6-bolt / (R) Formula 142x12mm 6-bolt, standard road 11sp freehub body
RimsWTB ST I27 TCS 2.0
SpokesStainless Black 14g
Front TireMaxxis Ravager EXO TR 700x50c
Rear TireMaxxis Ravager EXO TR 700x50c

Geometry

6 sizes · 15 measurements

Frame measurements by size.

All geometry measurements6 sizes · 15 measurements
Measurement485052545658
Seat tube410 mm410 mm455 mm455 mm500 mm535 mm
Top tube532 mm547 mm559 mm578 mm595 mm616 mm
Head tube116 mm132 mm148 mm172 mm193 mm225 mm
Head-tube angle68.7°68.7°68.7°68.7°68.7°68.7°
Seat-tube angle74.2°73.7°73.2°72.7°72.2°71.7°
Chainstay / rear center445 mm445 mm445 mm445 mm445 mm445 mm
Wheelbase1060 mm1071 mm1082 mm1096 mm1108 mm1124 mm
Bottom-bracket drop69 mm69 mm69 mm66 mm66 mm66 mm
Bottom-bracket height296 mm296 mm296 mm299 mm299 mm299 mm
Reach372 mm377 mm382 mm386 mm391 mm396 mm
Stack566 mm581 mm598 mm616 mm636 mm666 mm
Standover height725 mm730 mm769 mm777 mm814 mm848 mm
Fork offset / rake51 mm51 mm51 mm51 mm51 mm51 mm
Front center624 mm635 mm646 mm659 mm671 mm687 mm
Fork length / axle-to-crown435 mm435 mm435 mm435 mm435 mm435 mm

Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.

Gearing

Chainring ÷ rear sprocket

Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.

All published sizes40T · 11–48T · 10-speed
Lowest0.83:1 Highest3.64:1 Total range436%

6.3–27.7 mph at 90 rpm, estimated from the published rear tire size 700×50c · 50-622 ETRTO.

Campaign

Parts & serviceability

Find replacement parts

Original specifications
Chain · Original
KMC X10
Cassette · Original
Microshift Sword 11-48t 10spd Search: Microshift Sword 11-48t 10spd cassette
Front tire · Original
Maxxis Ravager EXO TR 700x50c
Retailer offers · Affiliate links
More parts (6)
Saddle · Original
WTB Volt
Crankset · Original
Microshift Sword; Chainring: 40t 10sp narrow-wide
Rear derailleur · Original
Microshift Sword Long Cage w/Clutch Search: microSHIFT Sword 10-speed rear derailleur
Seatpost · Original
TranzX Dropper +RAD Internal 31.6mm 125mm travel
Retailer offers · Affiliate links
Headset · Original
FSA No.57B
Rims · Original
WTB ST i27 TCS 2.0

Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases.

Bike-specific inspection checklist 20 checks based on 6 archived component groups Open checklistClose checklist
0 of 20 checked Progress stays in this browser for this bike.

This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.

Archived: 2025 Kona Ouroboros · Cyclocross/Gravel · Published sizes: 48, 50, 52, 54, 56, 58

Archived: Frame: Kona 6061 Aluminum Butted · Fork: Suntour GVX32 40mm travel, Tapered, 100x12mm

Archived: Fork: Suntour GVX32 40mm travel, Tapered, 100x12mm

Archived: Shifters: Microshift Sword left dropper/brake and right brake/shifter · Rear derailleur: Microshift Sword Long Cage w/Clutch · Crankset: Microshift Sword; Chainring: 40t 10sp narrow-wide · Bottom bracket: Prowheel PF86.5 · Cassette: Microshift Sword 11-48t 10spd · Chain: KMC X10

Archived: Brakes: Brake Calipers: TRP Spyre C; Front Brake Rotor: TRP 180mm; Rear Brake Rotor: TRP 180mm; Brake Levers: Microshift Sword

Archived: Rims: WTB ST i27 TCS 2.0 · Hubs: (F) Formula 100x12mm 6-bolt / (R) Formula 142x12mm 6-bolt, standard road 11sp freehub body · Front tire: Maxxis Ravager EXO TR 700x50c · Rear tire: Maxxis Ravager EXO TR 700x50c

Controls and contact points

Archived: Headset: FSA No.57B · Handlebar: Kona Gravel 20-degree flare, 48: 440mm; 50: 460mm; 52-54: 480mm; 56: 500mm; 58: 520mm · Stem: Kona Gravel 6-degree rise, 48-52: 50mm; 54-58: 60mm · Seatpost: TranzX Dropper +RAD Internal 31.6mm 125mm travel · Saddle: WTB Volt

Before and during the test ride

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Gallery8 images

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Campaign

Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

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