Rear tire: 27.5×2.3.
Velopedia Bicycle Archive
2018 Kona Explosif
Original specifications: 27.5" wheels · geometry for 4 published sizes.
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At a glance
Archive #900003525- Model year
- 2018
- Category
- Mountain
- Sizes
- S, M, L, XL
- Colors
- Gloss Green & Charcoal w/ Off-White & Charcoal Decals
- Geometry
- 4 manufacturer sizes
- In this record
- 21 specifications · archived image · geometry
Model history 13 other years
Browse other years
Compare side by side
Identification clues
2018 archived details
- Published colors
- Gloss Green & Charcoal w/ Off-White & Charcoal Decals
- Frame
- Steel
Clues, not proof of model year. Colors vary and components may have been replaced.
Original buildSteel · 27.5"
Frameset
| Frame Construction | Reynolds 520 Butted Cromoly |
|---|---|
| Frame Material | Steel |
| Fork | RockShox Revelation RC Solo Air 120mm Tapered 110mm Spacing |
Drivetrain
| Shifters | SRAM GX-Eagle |
|---|---|
| Rear Derailleur | SRAM GX-Eagle |
| Crankset | SRAM Descendant 6K; Chainring: 34t X-Sync Eagle |
| Bottom Bracket | SRAM 73mm |
| Cassette | SRAM GX-Eagle 10-50t 12spd |
| Chain | SRAM GX-Eagle |
Brakes
| Brakes | Brake Calipers: SRAM Guide R; Front Brake Rotor: SRAM Centerline 180mm; Rear Brake Rotor: SRAM Centerline 160mm; Brake Levers: SRAM Guide R |
|---|
Cockpit & Contact Points
| Headset | FSA No.57B |
|---|---|
| Handlebar | Kona XC/BC 35 |
| Stem | Kona XC/BC 35 |
| Saddle | WTB Volt Comp (Comp 250 size S) |
| Seatpost | RockShox Reverb w/Plunger Lever 31.6mm |
Wheels & Tires
| Hubs | (F) Formula 110x15mm / (R) Formula 148x12mm |
|---|---|
| Rims | WTB STP I29 TCS |
| Spokes | Sandvik Stainless Black 15g fr / 14g rr |
| Front Tire | Maxxis Minion DHF EXO TR 3C 27.5x2.3" |
| Rear Tire | Maxxis Tomahawk EXO TR 3C 27.5x2.3" |
| Wheel Size | 27.5" |
No specifications match. Try a component name or clear your search.
Geometry
Frame measurements by size.
Frame diagram
Select an available measurement to locate it on the frame.
All geometry measurements4 sizes · 15 measurements
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Seat tube | 370 mm | 420 mm | 470 mm | 530 mm |
| Top tube | 583 mm | 612 mm | 640 mm | 674 mm |
| Head tube | 100 mm | 115 mm | 125 mm | 140 mm |
| Head-tube angle | 67.5° | 67.5° | 67.5° | 67.5° |
| Seat-tube angle | 73° | 73° | 73° | 73° |
| Chainstay / rear center | 420 mm | 420 mm | 420 mm | 420 mm |
| Wheelbase | 1093 mm | 1124 mm | 1153 mm | 1188 mm |
| Bottom-bracket drop | 42 mm | 42 mm | 42 mm | 42 mm |
| Bottom-bracket height | 313 mm | 313 mm | 313 mm | 313 mm |
| Reach | 402 mm | 427 mm | 452 mm | 482 mm |
| Stack | 591 mm | 605 mm | 614 mm | 628 mm |
| Standover height | 705 mm | 740 mm | 775 mm | 815 mm |
| Fork offset / rake | 42 mm | 42 mm | 42 mm | 42 mm |
| Front center | 677 mm | 707 mm | 736 mm | 771 mm |
| Fork length / axle-to-crown | 509 mm | 509 mm | 509 mm | 509 mm |
Dimensions as recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM = pedal turns per minute.
How it works
Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.
Speeds are estimates from tire size and pedal cadence. Actual speeds vary.
Try your current gearingChanged tires or gears? Calculate your setup.
Your changes apply to this calculation. The archived build stays unchanged.
Gearing results
| Measure | Original | Your setup |
|---|---|---|
| Lowest ratio | — | — |
| Highest ratio | — | — |
| Total range | — | — |
| Lowest-gear speed | — | — |
| Highest-gear speed | — | — |
Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.
Parts & serviceability
Find replacement parts

SRAM GX Eagle 12-Speed Chain Silver, 126 links
Specification match

SRAM XG-1275 GX Eagle 12-Speed Cassette Black, 10-50t
Specification match

Vittoria Mota G2.0 4C Trail 27.5in Tire Anthracite/Black, Trail/TNT, 27.5x2.3
Replacement option
More parts (8)Fewer parts
Chainring: 34t X-Sync Eagle
Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.
Service essentialsQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- Maxxis Minion DHF EXO TR 3C 27.5x2.3"Check: Verify the fitted tire’s size marking and rim type.
- Rear tire
- Maxxis Tomahawk EXO TR 3C 27.5x2.3"Check: Verify the rear size; it may differ from the front.
- Drivetrain
- 12-speedCheck: Match the installed drivetrain family, not just its speed count.
- Seatpost diameter
- 31.6 mmCheck: Read the post’s diameter marking; seat-clamp size differs.
- Bottom bracket / shell
- SRAM 73mmCheck: Verify shell type and width, crank interface, and spindle length or spacers.
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: 2018 Kona Explosif · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Reynolds 520 Butted Cromoly · Fork: RockShox Revelation RC Solo Air 120mm Tapered 110mm Spacing
Suspension
Evaluate the suspension →Archived: Fork: RockShox Revelation RC Solo Air 120mm Tapered 110mm Spacing
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM GX-Eagle · Rear derailleur: SRAM GX-Eagle · Crankset: SRAM Descendant 6K; Chainring: 34t X-Sync Eagle · Bottom bracket: SRAM 73mm · Cassette: SRAM GX-Eagle 10-50t 12spd · Chain: SRAM GX-Eagle
Brakes
Inspect the brakes →Archived: Brakes: Brake Calipers: SRAM Guide R; Front Brake Rotor: SRAM Centerline 180mm; Rear Brake Rotor: SRAM Centerline 160mm; Brake Levers: SRAM Guide R
Wheels and tires
Check wheels and tires →Archived: Wheel size: 27.5" · Rims: WTB STP i29 TCS · Hubs: (F) Formula 110x15mm / (R) Formula 148x12mm · Front tire: Maxxis Minion DHF EXO TR 3C 27.5x2.3" · Rear tire: Maxxis Tomahawk EXO TR 3C 27.5x2.3"
Controls and contact points
Archived: Headset: FSA No.57B · Handlebar: Kona XC/BC 35 · Stem: Kona XC/BC 35 · Seatpost: RockShox Reverb w/Plunger Lever 31.6mm · Saddle: WTB Volt Comp (Comp 250 size S)
Before and during the test ride
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.





