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2022 Public

R18 Disc

A 700c steel frame commuter bike with mid-range components and promax mechanical disc brakes.
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Manufacturer Price

$1,000
Weight27.0 lbs  
FrameSteel
SuspensionRigid
ForkSteel
Wheels700c Aluminum
Drivetrain2 × 9
GroupsetSora
BrakesPromax Mechanical Disc
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Insights
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

36 mph

R18 Disc

31 mph

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Highest gear

(descending)

Sizing
XS

4'11" – 5'5"

SM

5'2" – 5'7"

MD

5'4" – 5'10"

LG

5'7" – 6'1"

🐐 Estimated

Rider Fit Notes

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Specs
Build
Frame

PUBLIC 100% Chromoly steel, with fender and rack braze-ons

ColorsCobalt; Cream

Fork

PUBLIC chromoly hi-tensile blend unicrown disc fork, with fender and rack braze-ons

Headset

1.125" threadless, steel

Stem

Alloy, threadless high polish silver, 25.4 clamp (80mm for XS/S/M; 100mm for L)

Handlebar

PUBLIC alloy riser bar, 610mm wide, 10 deg backsweep, 20mm rise

Saddle

PUBLIC Premium Sport Saddle, 153mm wide, chromoly rails, with brass rivets

Seatpost

Alloy micro-adjust with integrated clamp, 27.2mm

TypeRigid

Pedals

Wellgo M149 full alloy platform and cage, 9/16" axle

Grips

PUBLIC Slender Grip, with alloy clamps

Groupset
Rear Derailleur

Shimano Sora R-3000 9-speed

Front Derailleur

Shimano Sora R-3000 (2x9)

Crank

Alloy double crankset 46/34 tooth rings (S: 165mm M: 170 L: 175mm)

Shifters

Shimano Rapid Plus

Cassette

Shimano 9-speed HG400 11-32 tooth cassette

Brakes

Promax mechanical disc brakes with 160mm rotors, with alloy 4 finger lever.

TypePromax Mechanical Disc

Wheels
Rims

Alloy double wall, 32H, 700c

Spokes

14G Stainless steel

Front Hub

Alloy hub with bolt-on quick-release skewer

Rear Hub

Alloy hub with bolt-on quick-release skewer

Tires

Kenda Kwest 700x32c

Accessories
Fenders

Polished silver, 47mm alloy fenders (F/760mm, R/1230mm)

Rider Notes
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First added June 10

Last updated February 11

Not listed for 1,206 days