Velopedia Bicycle Archive

2018 Kona Big Kahuna

Original specifications: 27.5" wheels · geometry for 4 published sizes.

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At a glance

Archive #900003576
Model year
2018
Category
Mountain
Sizes
S, M, L, XL
Colors
Gloss Hot Orange & Black w/ Black & Blue Decals
Geometry
4 manufacturer sizes
In this record
23 specifications · archived image · geometry
Model history 6 other years

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Identification clues

2018 archived details

Published colors
Gloss Hot Orange & Black w/ Black & Blue Decals
Frame
Aluminum

Clues, not proof of model year. Colors vary and components may have been replaced.

Campaign
Original buildAluminum · 27.5"

Manufacturer catalog

Published sizes and colors

4 sizes · 1 color

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

Published sizes

SMLXL

Published colors

Gloss Hot Orange & Black w/ Black & Blue Decals

Frameset

Frame ConstructionKona 6061 Aluminum Butted
Frame MaterialAluminum
ForkRockShox Recon RL Solo Air 100mm Tapered 110mm Spacing

Drivetrain

ShiftersShimano Deore
Front DerailleurShimano Deore
Rear DerailleurShimano Deore
CranksetRaceFace Aeffect; Chainring: 22/36t
Bottom BracketRaceFace 83mm
CassetteShimano HG500 11-42t 10spd
ChainShimano HG54
PedalsKona JS2

Brakes

BrakesBrake Calipers: Shimano Hydraulic MT500; Front Brake Rotor: Shimano RT26 180mm; Rear Brake Rotor: Shimano RT26 160mm; Brake Levers: Shimano Hydraulic MT500

Cockpit & Contact Points

HeadsetFSA No.57B
HandlebarKona XC/BC Riser
StemKona XC/BC
SaddleWTB Pure V Sport
SeatpostKona Thumb w/Offset 31.6mm

Wheels & Tires

Hubs(F) Formula 110x15mm / (R) Formula 157x12mm
RimsWTB Scraper i40 Pinned TCS
SpokesStainless Black 14g
Front TireSchwalbe Nobby Nic 27.5x2.8"
Rear TireSchwalbe Nobby Nic 27.5x2.8"
Wheel Size27.5"

Geometry

4 sizes · 15 measurements

Frame measurements by size.

All geometry measurements4 sizes · 15 measurements
MeasurementSMLXL
Seat tube370 mm420 mm470 mm530 mm
Top tube578 mm605 mm633 mm666 mm
Head tube95 mm105 mm115 mm125 mm
Head-tube angle69°69°69°69°
Seat-tube angle74°74°74°74°
Chainstay / rear center440 mm440 mm440 mm440 mm
Wheelbase1107 mm1135 mm1164 mm1198 mm
Bottom-bracket drop55 mm55 mm55 mm55 mm
Bottom-bracket height310 mm310 mm310 mm310 mm
Reach405 mm429 mm454 mm485 mm
Stack604 mm613 mm623 mm632 mm
Standover height710 mm745 mm775 mm820 mm
Fork offset / rake51 mm51 mm51 mm51 mm
Front center672 mm700 mm729 mm763 mm
Fork length / axle-to-crown509 mm509 mm509 mm509 mm

Dimensions as recorded.

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

RPM

RPM = pedal turns per minute.

All published sizes36/22T · 11–42T · 10-speed
Lowest0.52:1 Highest3.27:1 Total range625%
Estimated speed At 90 RPM Lowest gear4.0 mph Highest gear25.1 mph

Rear tire: 27.5×2.8.

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 other gearing

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Your gearing setup
Gears

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

For 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave both fields empty to compare ratios only.

Gear, dimension and cadence changes update results automatically.

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

Find replacement parts

Original specifications
Front tire · Original
Schwalbe Nobby Nic 27.5x2.8"
Retailer offers
Chain · Original
Shimano HG54
Cassette · Original
Shimano HG500 11-42t 10spd
More parts (7)Fewer parts
Saddle · Original
WTB Pure V Sport
Crankset · Original
RaceFace Aeffect

Chainring: 22/36t

Front derailleur · Original
Shimano Deore
Rear derailleur · Original
Shimano Deore
Shifters · Original
Shimano Deore
Headset · Original
FSA No.57B
Rims · Original
WTB Scraper i40 Pinned TCS

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
Schwalbe Nobby Nic 27.5x2.8"Check: Verify the fitted tire’s size marking and rim type.
Rear tire
Schwalbe Nobby Nic 27.5x2.8"Check: Verify the rear size; it may differ from the front.
Drivetrain
10-speedCheck: Match the installed drivetrain family, not just its speed count.
Bottom bracket / shell
RaceFace 83mmCheck: Verify shell type and width, crank interface, and spindle length or spacers.

Not confirmed in this record: Seatpost diameter. Check the fitted parts for these details.

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 record.

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: 2018 Kona Big Kahuna · Mountain · Published sizes: S, M, L, XL

Archived: Frame: Kona 6061 Aluminum Butted · Fork: RockShox Recon RL Solo Air 100mm Tapered 110mm Spacing

Archived: Fork: RockShox Recon RL Solo Air 100mm Tapered 110mm Spacing

Archived: Shifters: Shimano Deore · Front derailleur: Shimano Deore · Rear derailleur: Shimano Deore · Crankset: RaceFace Aeffect; Chainring: 22/36t · Bottom bracket: RaceFace 83mm · Cassette: Shimano HG500 11-42t 10spd · Chain: Shimano HG54

Archived: Brakes: Brake Calipers: Shimano Hydraulic MT500; Front Brake Rotor: Shimano RT26 180mm; Rear Brake Rotor: Shimano RT26 160mm; Brake Levers: Shimano Hydraulic MT500

Archived: Wheel size: 27.5" · Rims: WTB Scraper i40 Pinned TCS · Hubs: (F) Formula 110x15mm / (R) Formula 157x12mm · Front tire: Schwalbe Nobby Nic 27.5x2.8" · Rear tire: Schwalbe Nobby Nic 27.5x2.8"

Controls and contact points

Archived: Headset: FSA No.57B · Handlebar: Kona XC/BC Riser · Stem: Kona XC/BC · Seatpost: Kona Thumb w/Offset 31.6mm · Saddle: WTB Pure V Sport · Pedals: Kona JS2

Before and during the test ride

Follow the full used-bike inspection order →

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

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