Velopedia Bicycle Archive
2025 Kona Ouroboros
Cyclocross/Gravel bicycle from the Velopedia specification archive.
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What Velopedia knows
- 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 · Geometry context
- Record coverage
- 23 preserved details · 8 archived images · original MSRP · preserved geometry
- Archive ID
- 900001002
Frameset
| Frame Construction | Kona 6061 Aluminum Butted |
|---|---|
| Frame Material | Aluminum |
| Fork | Suntour GVX32 40mm travel, Tapered, 100x12mm |
| Rear Shock | n/a |
Drivetrain
| Shifters | Microshift Sword left dropper/brake and right brake/shifter |
|---|---|
| Front Derailleur | n/a |
| 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 |
| Pedals | n/a |
Brakes
| Brakes | Brake Calipers: TRP Spyre C; Front Brake Rotor: TRP 180mm; Rear Brake Rotor: TRP 180mm; Brake Levers: Microshift Sword |
|---|
Cockpit & Contact Points
| 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 |
| Saddle | WTB Volt |
| Seatpost | TranzX 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 |
|---|---|
| Rims | WTB ST I27 TCS 2.0 |
| Spokes | Stainless Black 14g |
| Front Tire | Maxxis Ravager EXO TR 700x50c |
| Rear Tire | Maxxis Ravager EXO TR 700x50c |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | 48 | 50 | 52 | 54 | 56 | 58 |
|---|---|---|---|---|---|---|
| Seat tube | 410 mm | 410 mm | 455 mm | 455 mm | 500 mm | 535 mm |
| Top tube | 532 mm | 547 mm | 559 mm | 578 mm | 595 mm | 616 mm |
| Head tube | 116 mm | 132 mm | 148 mm | 172 mm | 193 mm | 225 mm |
| Head-tube angle | 68.7° | 68.7° | 68.7° | 68.7° | 68.7° | 68.7° |
| Seat-tube angle | 74.2° | 73.7° | 73.2° | 72.7° | 72.2° | 71.7° |
| Chainstay / rear center | 445 mm | 445 mm | 445 mm | 445 mm | 445 mm | 445 mm |
| Wheelbase | 1060 mm | 1071 mm | 1082 mm | 1096 mm | 1108 mm | 1124 mm |
| Bottom-bracket drop | 69 mm | 69 mm | 69 mm | 66 mm | 66 mm | 66 mm |
| Bottom-bracket height | 296 mm | 296 mm | 296 mm | 299 mm | 299 mm | 299 mm |
| Reach | 372 mm | 377 mm | 382 mm | 386 mm | 391 mm | 396 mm |
| Stack | 566 mm | 581 mm | 598 mm | 616 mm | 636 mm | 666 mm |
| Standover height | 725 mm | 730 mm | 769 mm | 777 mm | 814 mm | 848 mm |
| Fork offset / rake | 51 mm | 51 mm | 51 mm | 51 mm | 51 mm | 51 mm |
| Front center | 624 mm | 635 mm | 646 mm | 659 mm | 671 mm | 687 mm |
| Fork length / axle-to-crown | 435 mm | 435 mm | 435 mm | 435 mm | 435 mm | 435 mm |
Geometry source: Manufacturer HTML geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
48 geometry
Archive context: The head angle of 68.7° sits toward the slacker end. Its bottom-bracket drop of 69 mm sits toward the shallower-drop end. The chainstay of 445 mm sits toward the longer rear-center end.
Compared with 87 distinct cyclocross/gravel geometries in the Small-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 48 geometry 50 geometry
Archive context: The head angle of 68.7° sits toward the slacker end. Its wheelbase of 1071 mm sits toward the longer end. Its bottom-bracket drop of 69 mm sits toward the shallower-drop end.
Compared with 87 distinct cyclocross/gravel geometries in the Small-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 50 geometry 52 geometry
Archive context: The head angle of 68.7° sits toward the slacker end. The chainstay of 445 mm sits toward the longer rear-center end. Its bottom-bracket drop of 69 mm sits toward the shallower-drop end.
Compared with 98 distinct cyclocross/gravel geometries in the Medium-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 52 geometry 54 geometry
Archive context: The seat angle of 72.7° sits toward the more relaxed end. The head angle of 68.7° sits toward the slacker end. Its bottom-bracket drop of 66 mm sits toward the shallower-drop end.
Compared with 98 distinct cyclocross/gravel geometries in the Medium-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 54 geometry 56 geometry
Archive context: The seat angle of 72.2° sits toward the more relaxed end. The head angle of 68.7° sits toward the slacker end. Its bottom-bracket drop of 66 mm sits toward the shallower-drop end.
Compared with 69 distinct cyclocross/gravel geometries in the Large-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 56 geometry 58 geometry
Archive context: The seat angle of 71.7° sits toward the more relaxed end. Its stack of 666 mm sits toward the taller end. The head angle of 68.7° sits toward the slacker end.
Compared with 74 distinct cyclocross/gravel geometries in the XL-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 58 geometry Parts & serviceability
Find replacement parts
ChainKMC X10Exact archived model
CassetteMicroshift Sword 11-48t 10spdComponent family — verify exact version
Front tireMaxxis Ravager EXO TR 700x50cNamed tire and published size
More qualified parts (6)
SaddleWTB VoltNamed archived component — verify exact version
CranksetMicroshift Sword; Chainring: 40t 10sp narrow-wideComponent family — verify exact version
Rear derailleurMicroshift Sword Long Cage w/ClutchNamed component · published drivetrain speed — verify exact version
Seatpost31.6 mm dropper postDropper post identified — select the published travel for your frame size
HeadsetFSA No.57BNamed archived component — verify dimensions
RimsWTB ST I27 TCS 2.0Named archived component — verify dimensions
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. 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. Commercial relationships do not influence Archive specifications or analysis.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameLook closely for dents and hairline cracks around welds, the head tube and bottom-bracket area. Cosmetic scratches matter less than a change in shape or a crack line.Inspect the frame and fork →
- BrakesTest each brake separately and confirm it stops firmly and releases cleanly. Inspect the pads and braking surfaces for wear or contamination, and check the cables or hoses for damage.Inspect the brakes →
- SuspensionAsk when the fork was last serviced. Check the stanchions for damage, look for oil at the seals and make sure the fork moves smoothly without bushing play.Evaluate the suspension →
- DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 10-speed system.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
Bike-specific inspection checklist 20 checks based on 6 archived component groups Open checklistClose checklist
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.
Identity and fit
Follow the full used-bike inspection order →Archived: 2025 Kona Ouroboros · Cyclocross/Gravel · Published sizes: 48, 50, 52, 54, 56, 58
Frame and fork
Inspect the frame and fork →Archived: Frame: Kona 6061 Aluminum Butted · Fork: Suntour GVX32 40mm travel, Tapered, 100x12mm
Suspension
Evaluate the suspension →Archived: Fork: Suntour GVX32 40mm travel, Tapered, 100x12mm
Drivetrain
Check drivetrain wear →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
Brakes
Inspect the brakes →Archived: Brakes: Brake Calipers: TRP Spyre C; Front Brake Rotor: TRP 180mm; Rear Brake Rotor: TRP 180mm; Brake Levers: Microshift Sword
Wheels and tires
Check wheels and tires →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
Follow the full used-bike inspection order →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Market Snapshot
Velopedia did not find a close used eBay listing in the latest snapshot. New and used listings remain separate.
Evidence standard
Fixed-price and Best Offer item prices only
Shipping and tax excluded
Active asks, not completed sales
No close current matches found. Velopedia did not find an eBay listing confident enough to include in the latest snapshot.
Listings shown have not passed their eBay-supplied end time. Velopedia rechecks matched bicycles on a protected weekly cycle; availability can still change between checks. Price calculations use active fixed-price and Best Offer item prices before shipping and tax. Auction bids, auction-only prices, classified ads, lower-confidence Review candidates and ended listings are excluded. These observations are not completed-sale prices, a certified appraisal or a guarantee of value.
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.