If you'd like to design your dream bike from handlebars to wheels (and even help put it together), this Park Slope workshop will meet your needs. First, sit down with owner Joe Nocella and sketch out your vision. He'll draw up several options (with frames from Surly, Mission, Leader and more), which you'll share in a Google Doc, before narrowing it down to the final design. Once the parts arrive, you're encouraged to put some elbow grease into your ride alongside the shop's mechanics. A single-speed starts at around $900—but the personalized bike is promised to last for years to come. Plus, with free open-to-the-public weekly classes (Thursdays at 7pm) on fixing flats, adjusting brakes and more advanced skills, you may never have to pay for a repair again.