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At 22lbs, this is the lightest single speed bike in it's class.
At 22lbs, this is the lightest single speed bike in it's class.
307 backers pledged $114,013 to help bring this project to life.

About

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Sparrow: the perfect city bike.

$114,013

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The Sparrow: the perfect city bike



Since 2013 Detroit Bikes has made and sold thousands of bicycles. During that time we've wanted to come up with the best bike for city riding. ...something simple, affordable, durable and lightweight. We think the Sparrow is the perfect city bicycle. 


White and Blue Sparrow
White and Blue Sparrow

We teamed up with Ben Serotta, American bicycle designer for the Tour de France, and the Olympics, to create the Sparrow's frame geometry in four sizes so every rider will find their ideal fit. The Sparrow is just 22lbs, thanks to thoughtful component selection and a frame made from aircraft grade aluminium.   


engineering drawings 1
engineering drawings 1
engineering drawings 2
engineering drawings 2


When you make your pledge we will send you a survey to find out which size bike you would like. We have the full bike geometry listed at the bottom of this page, but here are the height ranges we recommend: 


        S :   4'11" - 5'4"
        M :   5'3" - 5'9"
        L :   5'8" - 6'1"
        XL :  6' and up



Of course, the Sparrow had to look good, so we worked with bike industry designers to develop 4 colorways to choose from. 

red design
red design
blue design
blue design
grey design
grey design
green design
green design

Which after many months of product development work and testing landed us these four prototypes...



white and red profile
white and red profile
white and blue profile
white and blue profile
black and grey profile
black and grey profile
black and green profile
black and green profile

 When you make your pledge we will send you a survey to ask which colorway you would like: white/red, white/blue, black/grey or black/green.  


One the most important things about this bike is also one of the most subtle. Unless you've bought a bike online before, you won't know how difficult bikes can be to put together. Our goal is to free up your time and make cycling easier. Because our bikes are assembled in our Detroit factory, and shipped domestically, we can ship them in a more fully assembled state than bikes that ship assembled in China or Taiwan (99.9% of US bike sales are assembled in Asia). We've watched all kinds of 20-30 minute assembly videos where trained people try to make it look and sound easy to install brakes, but it isn't. So we did our best to get the assembly process down to the fewest possible steps. Here's a preview of those steps in a 14 second video:


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Keeping your tires full is the most basic (and easiest) part of bike maintenance, but without the right tools it can be frustrating. A good floor pump makes it simple, but not everyone has one. Our solution- we've included a free Detroit Bikes floor pump for you with your bike. 

free floor pump
free floor pump



Here's a video of Henry Ford II, our master builder, in the factory assembly room talking about Sparrow components.



This is Amanda, the head of our wheel building department, telling us what she likes about the Sparrow wheels she builds. 




And here is Production Manager Tom talking about the innovative Sparrow packaging. 




**Please note- if you can make it to Detroit and want to pick up your bike already assembled from our factory, let us know when we send out the survey and we will refund your shipping charge.  


SPARROW MEASUREMENT GEOMETRY CHART 

Measurement                     Small       Medium  Large     X-Large

Seat Tube Length                      420      480          530             570

Top Tube Length (Effective)   537      570.7  600.9       630.6

Head Tube Angle                        70        71.5    71.5        71.5

Seat Tube Angle                       73          73              73          73

Bottom Bracket Drop                 75          75              72          70

Standover                              672        718.5   763.4        804.9

Reach                                    382.7        413.5   437.6         456

Wheelbase                          1005.5       1026.3   1058.8       1080.6

Chainstay Length (Effective)  413          413.2     413.2         414.1



Sparrow specs

Frame:  6061 Aluminium  

Fork:  6061 Aluminium 

Rear Hub & Gearing: Single Speed Freewheel - 17T   

Wheels: 14 Guage Stainless Steel Spokes & Color-Keyed Alloy Double Wall Rims 30mm deep 

Brakes: Front and Rear Caliper Brakes 

Tires:  WTB Thickslick Comp, 700x28, Blackwall 

Handlebar: Aluminium handlebars, 15mm rise 

Crankset: Sturmey Archer Crankset w/chain guard - 44T 

Grips & Saddle: Velo Grips and SDG Duster Saddle, Black with Color-Keyed SDG logo


The Sparrow can accommodate a seat post mounted rear rack, but no front rack. Quick release style fenders would work for this bike, for example- Planet Bike Speed EZ's. This bike is a single speed freewheel, no flip flop. Rear dropout spacing is 120mm.



---------------------------------------------------------------



Factory tours will operate Fridays starting summer 2019. We are looking forward to showing you our facility.

T-shirts and Hoodies are printed in Detroit at Wet House http://wethouse.us

T-shirts are available in grey and red. Shirts are 100% ringspun cotton, super soft, well constructed canvas/bella S,M,L,XL and XXL in women's and men's sizes. http://www.bellacanvas.com/product/3001/3001-cv-ss-tee.html
 

Hoodies are warm, comfortable Jerzees and available with a black logo on black, or a black logo on grey. Sizes are S, M, L, XL and XXL. 

http://www.jerzees.com/996MR.shtml




And finally... here is a 2014 video Microsoft did for us of Henry Ford II, talking about what Detroit Bikes means to him.  An oldie, but a goodie.  


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Risks and challenges

Manufacturing and shipping delays can happen. If demand greatly exceeds our expectations there may be some delay with fulfillment.

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Support

  1. Select this reward

    Pledge US$ 30 or more About US$ 30

    Shirt and factory tour

    A Detroit Bikes t-shirt, a sticker, and an invitation to tour our factory.

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    Pledge US$ 50 or more About US$ 50

    Hoodie and factory tour

    A Detroit Bikes Hoodie, a sticker, and an invitation to tour our factory.

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  3. Select this reward

    Pledge US$ 329 or more About US$ 329

    Sparrow bike

    ● Lightest single-speed bike in its class (22 lbs!)
    ● Ships to your door 95% assembled, final assembly in just 5 minutes
    ● Frame, fork, and fork steerer made of heat-treated, aircraft-grade aluminum
    ● WTB Thickslick tires
    ● Multiple color combinations
    ● Rustproof KMC chain
    ● SDG saddle
    ● Comes with a free air pump

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    Estimated delivery
    Ships to Only certain countries
    Limited 85 backers
    $

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  4. Select this reward

    Pledge US$ 359 or more About US$ 359

    Sparrow bike

    ● Lightest single-speed bike in its class (22 lbs!)
    ● Ships to your door 95% assembled, final assembly in just 5 minutes
    ● Frame, fork, and fork steerer made of heat-treated, aircraft-grade aluminum
    ● WTB Thickslick tires
    ● Multiple color combinations
    ● Rustproof KMC chain
    ● SDG saddle
    ● Comes with a free air pump

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    Estimated delivery
    Ships to Anywhere in the world
    Limited 2 backers
    $

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  5. Select this reward

    Pledge US$ 499 or more About US$ 499

    The kitchen sink

    This package includes a Sparrow, a Kryptonite Keeper U lock, a Detroit bikes hat of your choice, a Detroit Bikes shirt of your choice, a Kali Saha Urban helmet, a water bottle, a water bottle cage, and a Detroit Bikes sweatshirt.

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    Limited 4 backers
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  6. Select this reward

    Pledge US$ 3,000 or more About US$ 3,000

    Sparrow fleet

    Buy a fleet of Sparrows. Select any 10 Sparrows of your choice.

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    Limited 1 backer
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  7. Select this reward

    Pledge US$ 10,000 About US$ 10,000

    Make your own custom US Chromoly bike

    Come to Detroit and spend a week with us, making your own custom US Chromoly bicycle. We will show you how we make bikes and give you a shot at any part of the process you feel comfortable trying out- from design to metal fab and welding, paint, assembly and wheel building.

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    Limited 0 backers
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  8. Reward no longer available

    Pledge US$ 299 or more About US$ 299

    Sparrow bike

    ● Lightest single-speed bike in its class (22 lbs!)
    ● Ships to your door 95% assembled, final assembly in just 5 minutes
    ● Frame, fork, and fork steerer made of heat-treated, aircraft-grade aluminum
    ● WTB Thickslick tires
    ● Multiple color combinations
    ● Rustproof KMC chain
    ● SDG saddle
    ● Comes with a free air pump

    Less
    Estimated delivery
    Ships to Only certain countries
    Reward no longer available 200 backers
    $

    By pledging you agree to Kickstarter's Terms of Use, Privacy Policy, and Cookie Policy.

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Funding period

- (30 days)