Velopedia Bicycle Archive

Compare Bicycles

Compare published geometry, gearing and specifications for up to three bicycles.

1 of 2 bicycles

At a glance

Key differences

Supported differences are shown below. Data limitations are labeled separately.

  1. Frame geometry

    2021 Kona KAHUNA has 12 mm more reach than 2018 Kona KAHUNA in the selected sizes.

    More reach puts the head-tube reference farther forward, not necessarily the hands.

  2. Handling

    2021 Kona KAHUNA has a 1.0° slacker head-tube angle than 2018 Kona KAHUNA in the selected sizes.

    Fork offset, tire size and wheelbase also affect steering; head angle alone is not a handling verdict.

  3. Gearing

    2021 Kona KAHUNA has a 6% lower climbing ratio than 2018 Kona KAHUNA.

    A lower ratio gives more mechanical advantage; rear-wheel rollout determines distance per crank turn.

Selected-size geometry

Geometry overlay

Frames share one scale and a bottom-bracket alignment. Size labels differ by brand; schematic drawing aids are identified below.

Gearing comparison

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

RPM

RPM = pedal turns per minute.

2021 Kona KAHUNASize M · 32T · 10–51T · 12-speed
Lowest0.63:1Highest3.20:1Total range510%
Estimated speed at 90 RPMLowest gear4.9 mphHighest gear25.0 mph

Rear tire: 29×2.35.

2018 Kona KAHUNASize M · 28T · 11–42T · 11-speed
Lowest0.67:1Highest2.55:1Total range382%
Estimated speed at 90 RPMLowest gear5.2 mphHighest gear19.8 mph

Rear tire: 29×2.25.

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

Complete specification tableShows different published values and gaps where a bicycle lacks data. Different wording reflects source language, not necessarily different components. Swipe for more columns.
Print / PDFCSV
Specification
2021 Kona Kahuna
2018 Kona Kahuna
Overview
Model Year
2021
2018
Brand
Kona
Kona
Model
Kahuna
Kahuna
Bicycle Type
Mountain
Mountain
Original MSRP
$1,399.00
Not documented
Colors
Gloss Metallic Alpine Blue w/ Metallic Silver & Black Decals
Matt Black & Olive w/ Olive & Yellow Decals
Sizes
S, M, L, XL
S, M, L, XL
Weight
—
—
Frameset
Frame Construction
Kona Race Light 6061 Aluminum Butted
Kona 6061 Aluminum Butted
Frame Material
Aluminum
Aluminum
Fork
RockShox Recon Silver RL Solo Air 100mm Tapered 110mm Spacing
RockShox Recon RL Solo Air 100mm Tapered
Drivetrain
Shifters
Shimano Deore 12 spd
SRAM NX
Rear Derailleur
Shimano Deore 12 spd
SRAM NX
Crankset
Shimano Deore 12spd; Chainring: 32t
SRAM NX; Chainring: 28t X-Sync
Bottom Bracket
Shimano 73mm
SRAM Powerspline 73mm
Cassette
Shimano Deore 10-51t 12spd
SRAM PG1130 11-42t 11spd
Chain
Shimano Deore 12spd
SRAM PC1110
Pedals
Kona JS2
Kona JS2
Brakes
Brakes
Brake Calipers: Shimano MT401 Hydraulic; Front Brake Rotor: Shimano RT10 180mm; Rear Brake Rotor: Shimano RT10 160mm; Brake Levers: Shimano MT401 Hydraulic
Brake Calipers: Shimano Deore; Front Brake Rotor: Shimano RT30 180mm (centerlock); Rear Brake Rotor: Shimano RT30 160mm (centerlock); Brake Levers: Shimano Deore
Cockpit & Contact Points
Headset
FSA No.57B
FSA No.57B
Handlebar
Kona XC/BC Riser
Kona XC/BC Riser
Stem
Kona XC
Kona XC
Saddle
WTB Volt
WTB Volt Comp (Comp 250 size S)
Seatpost
Kona Thumb w/Offset 31.6mm
Kona Thumb w/Offset 31.6mm
Wheels & Tires
Hubs
(F) Shimano 110x15mm / (R) Shimano 135x10mm
(F) Shimano 100x15mm (centerlock) / (R) Shimano 135x10mm (centerlock)
Rims
WTB ST I27 TCS 2.0
WTB STP I25
Spokes
Stainless Black 14g
Stainless Black 14g
Front Tire
Maxxis Forekaster 29x2.35"
Schwalbe Nobby Nic 29x2.25"
Rear Tire
Maxxis Forekaster 29x2.35"
Schwalbe Nobby Nic 29x2.25"
Wheel Size
29"
29"
Geometry · choose a size for each bicycle
Geometry size
Reach
440 mm
428 mm
Stack
611 mm
616 mm
Head-tube angle
68°
69°
Seat-tube angle
75°
74°
Seat tube
420 mm
420 mm
Head tube
105 mm
105 mm
Chainstay / rear center
450 mm
450 mm
Wheelbase
1164 mm
1142 mm
Bottom-bracket drop
60 mm
60 mm
Bottom-bracket height
315 mm
312 mm
Standover height
733 mm
735 mm
Fork offset / rake
51 mm
51 mm
Front center
720 mm
699 mm

Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.

Campaign
Scroll to Top