C9 Aluminum
C Model Size Guide
Find Your Size
A bike that fits properly is more fun to ride. The guides below offer size suggestion based on height in inches. If you have measuring tape, you may also determine your size by measuring your leg length plus one inch, which is your stand over measurement. For all bikes, we recommend at least 1 inch of space between you and the top tube of the bike. When in doubt, contact our customer service team via email at customerservice@publicbikes.com.
PUBLIC C7 24" |
Frame Size | Rider Height | Effective TT | Standover Height |
One-Size (24") - 29cm | 4'4" - 4'10" | 48.5cm | 20" |
PUBLIC C1, C7, C7i, C9, C8i Disc |
Frame Size | Rider Height | Effective TT | Standover Height |
Small/Medium - 41cm | 4'10" - 5'5" | 56cm | 22" |
Medium/Large - 51cm | 5'6" - 5'10" | 58.5cm | 22" |
*Please note: some riders may be a little outside of these height range recommendations but prefer the feel of a larger or smaller bike. Stand over height measurement is not as important as how the bike geometry feels while it is being ridden.
The PUBLIC C9-AL (Aluminum) is a sleeker version of our best-selling city bike and our lightest-weight step-through frame to date. This smart, lightweight commuter uses a modern frame design and is well-suited for breezing through errands around the city as well as longer commutes.
The PUBLIC C9-AL is our best step-through city bike, with more performance than ever and unbeatable value. We went back to the drawing board with a totally redesigned frame made from PUBLIC premium aluminum tubing. The Shimano 9-speed drivetrain provides a wider range of gears to conquer even steeper hills and longer distances, and the Rapid-fire trigger shifter provides quick, effortless shifting.
To keep this bike trim and sleek, we swapped in a lighter-weight saddle and commuter-tested handlebars while nixing the fenders, chain guard and kickstand altogether. Weighing in at just 25lbs, the PUBLIC C9-AL is a full 5lbs lighter than our average steel bike. This weight savings makes a big difference when you’re carrying the bike up or down stairs or during your regular commute.
This walk-up-apartment-friendly commuter features a low entry design that makes it easy to put a foot down when stopped, and allows you to get on and off the bike with ease in everyday attire. Puncture-resistant commuter bike tires deliver our signature smooth ride, even on rough city streets, and strong dual-pivot caliper brakes let you ride hard and stop on a dime in any traffic jam.
Lastly, front and rear rack mounts are included to accommodate a range of baskets and cargo racks, so you can let the bike do all of the heavy lifting (racks not included). You'd be hard-pressed to find a better bike at such an affordable price, with thoughtful design and quality components normally found on bikes costing much more.
With refinements in style and performance, we can confidently say the PUBLIC C9-AL is the best commuter bike available whether you’re going uptown, downtown, or all-around town.
Technical Specifications
Frame: | PUBLIC premium aluminum tubing, with fender and rack braze-ons |
Fork: | PUBLIC hi-tensile steel unicrown fork, with fender and rack braze-ons |
Kickstand: | Integrated kickstand mount (kickstand not included) |
Saddle: | PUBLIC City Saddle, 186mm wide, steel polished rails |
Grips: | PUBLIC Comfort Grip |
Stem: | Forged alloy quill stem, 25 degree rise, 25.4mm clamp |
Headset: | 1" threaded, steel |
Pedals: | AWellgo C169, full alloy platform and cage, 9/16" |
Handlebar: | PUBLIC alloy Cafe Handlebar, 600mm wide, 25 deg backsweep, 35mm rise |
Seat Post: | Alloy micro-adjust with integrated clamp, 27.2mm |
Derailleur (R): | Shimano Altus 9-speed |
Shifter: | Shimano Altus Rapidfire trigger shifters, 9-speed index |
Crank: | Alloy crankset 170mm, 39T chainring with outer chainring guard, square taper |
Cassette: | Shimano 9 speed HG2019 11-34 tooth cassette |
Brakes | Promax cold forged, high polish, alloy dual-pivot caliper, with alloy 4 finger lever |
Tires: | Kenda Kwest 700x35c |
Tubes: | Presta, 48mm valve |
Rims: | Painted to match, alloy 32H, 700c, machined braking surface |
Spokes: | 14G Stainless steel |
Hubs: | Alloy low flange 32H, bolt-on QR skewer |
Weight: | 24 lbs |