Velopedia Bicycle Archive
Compare Bicycles
Compare published geometry, gearing and specifications for up to three bicycles.
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1 of 2 bicycles
At a glance
Key differences
Supported differences are shown below. Data limitations are labeled separately.
- Frame geometry
2021 Kona Unit has 21 mm more reach than 2018 Kona Unit in the selected sizes.
More reach puts the head-tube reference farther forward, not necessarily the hands.
- Frame geometry
2021 Kona Unit has 15 mm more stack than 2018 Kona Unit in the selected sizes.
More stack places the frame reference higher, not necessarily the handlebar.
- Handling
2021 Kona Unit has a 1.0° slacker head-tube angle than 2018 Kona Unit in the selected sizes.
Fork offset, tire size and wheelbase also affect steering; head angle alone is not a handling verdict.
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.
Ratio1.78:1
Estimated speed at 90 RPMGear
Rear tire: 29×2.6.
Ratio1.78:1
Estimated speed at 90 RPMGear
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.
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.
Specification
2021 Kona Unit
2018 Kona Unit
Overview
Model Year
2021
2018
Brand
Kona
Kona
Model
Unit
Unit
Bicycle Type
Mountain
Mountain
Original MSRP
$1,249.00
Not documented
Colors
Satin Fatgue Green w/ Gloss Yellow, Nicotine & Flame Fade Decals
Matt Black & Grey w/ Grey & Yellow Decals
Sizes
S, M, L, XL
S, M, L, XL
Weight
—
—
Frameset
Frame Construction
Reynolds 520 Butted Cromoly
Reynolds 520 Butted Cromoly
Frame Material
Steel
Steel
Fork
Kona Plus fork 110mm spacing
Kona Plus fork
Drivetrain
Crankset
FSA Comet Modular; Chainring: 32t
FSA Comet Modular; Chainring: 32t
Bottom Bracket
FSA MegaExo 73mm
FSA 7100
Cassette
Joytech 18t
Joytech 18t
Chain
KMC Z1 Narrow
KMC Z610
Pedals
Kona JS2
Kona JS2
Brakes
Brakes
Brake Calipers: Shimano MT201 Hydraulic; Front Brake Rotor: Shimano RT26 180mm; Rear Brake Rotor: Shimano RT26 160mm; Brake Levers: Shimano MT201 Hydraulic
Brake Calipers: Tektro HDM285; Front Brake Rotor: Tektro TR180 180mm; Rear Brake Rotor: Tektro TR160 160mm; Brake Levers: Tektro HDM285
Cockpit & Contact Points
Headset
TH ZST no.10
TH ZST no.10
Handlebar
Kona XC/BC Riser
Kona XC/BC Riser
Stem
Kona XC
Kona XC/BC
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) Formula 110x15mm / (R) Formula 148x12mm
(F) Formula 100x9mm / (R) Formula 135x10mm
Rims
WTB ST I30 TCS 2.0
WTB Scraper i40 Pinned TCS
Spokes
Stainless Black 14g
Sandvik Stainless 15g fr / 14g rr
Front Tire
WTB Ranger TCS 29x2.6"
WTB Ranger TCS 27.5x2.8"
Rear Tire
WTB Ranger TCS 29x2.6"
WTB Ranger TCS 27.5x2.8"
Wheel Size
29"
27.5"
Geometry · choose a size for each bicycle
Geometry size
Reach
450 mm
429 mm
Stack
597 mm
582 mm
Head-tube angle
68°
69°
Seat-tube angle
75°
74°
Seat tube
420 mm
420 mm
Head tube
120 mm
105 mm
Chainstay / rear center
430 mm
442 mm
Wheelbase
1144 mm
1121 mm
Bottom-bracket drop
65 mm
60 mm
Bottom-bracket height
310 mm
305 mm
Standover height
731 mm
725 mm
Fork offset / rake
50 mm
50 mm
Front center
722 mm
686 mm
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.