Welcome to Cosmic Bikes! We're local and hands-on.

Brompton bicycles

The ultimate in versatility and flexibility, folding bikes let you to combine biking with transit, taxi cabs, and give you access to storage and security options unavailable to standard bikes. And that's just for local riding. For the traveler with a folding bike, the world is your oyster.

bike diversity

kids' & family bikes

What is a cyclist? A kid with her first training wheels, a student on a single-speed, a dad running errands with baby in tow, a mom getting on the train with her folding bike, a person rediscovering the joys of cycling on a trike. We have bikes for all of them, and more.

Kids gravitate to bicycles, and immediately recognize the autonomy they offer. When taught to treat bikes like vehicles, not toys, kids will grasp from an early age the freedom and independence that comes from getting places on their own power.

Bicycle services


A well tuned bicycle is a joy to ride, and our mechanics are seasoned masters of their trade. You can count on their expertise, solid, street-tested advice, and have the confidence that when you bring your bike in for repair, you're leaving it in good hands.

Could a Brompton fit into your life?

We're a FULL-SERVICE Brompton resource!


We love Bromptons, and have been riding them for years! Some of our technicians have worked on Bromptons for over 10 years. We can handle everything from a not-so-simple flat repair to hinge replacement, to complete overhaul.
Our store is well-stocked with a selection of Brompton bikes and accessories, current-model demo bikes and repair parts. We're happy to assist with your custom Brompton order, and offer FREE delivery and set-up in the Chicago area.

Available now for purchase or pre-order. Come in for a test ride:


Yuba compact and full-size cargo bikes.


Faraday Electric bikes.


Blix Electric & Folding bikes.

Recent Rides and Adventures: 52 Rides in 52 Weeks

Click here for all recent rides.

From our blog, and other things you might want to know:


Were it not for the invention of the hybrid bike, urban cycling in the US would not be what it is today. What started as a cross between a mountain bike and a road bike resulted in a new bike category, more comfortable and sensible than either of the parents. And, what started out as a compromise, actually created a riding style all of its own. (more)


Some think bike commuting is for the dedicated few. It seems like a lifestyle choice, and maybe riding a bike doesn't fit in your daily schedule. Or maybe you're not sure if you'll like it. At least not all the time. That's OK. Biking doesn't have to be an all-or-nothing proposition. You can use your bike when convenient and enjoyable, and still use the car when you really need it. (more)


Bicycle theft is rampant in many urban neighborhoods, and Chicago certainly has its share of the problem. Whether you are riding an expensive bike or a garage-sale model, having your bike stolen is expensive, inconvenient and downright maddening. Fortunately, there are several things you can do to make your bike a less likely target. (more)


One of our goals at Cosmic Bikes is to help more people become comfortable using a bike as part of their lifestyle, and therefore, we'd like to help people overcome some of the most basic obstacles to riding: flat tires, inability to carry stuff, route planning and fear of traffic, fear of theft, and fear of the Unknown. (more)