Depending on the brand and what sort of repair you need, you may not have to resort to shipping it back to the manufacturer. If you’ve got a flat tire or other simple problem with the wheels, try taking your stroller to a bike shop. Wicker Park’s Rapid Transit(1900 W North Ave, 773-227-2288) can replace wheel bearings and inner tubes while you wait. For repairs that require attention to other parts of the stroller, try the on-site stroller repair and service center at the Lincoln Park location of Galt Baby(1915 N Clybourn Ave, 773-327-9980; repairs available Tue and Thu–Sun from 1–7pm). Manager Jesse Trevino says the center has worked on “just about every stroller imaginable,” though it does have better success with lower-end models, which tend to have parts that are exposed rather than covered. An online search can turn up surprising results for authorized repair dealers: Peg Perego’s sole source in the city is Bell Television(4925 W Irving Park Rd, 773-282-4000). And if you bought your fancy Baby Jogger or BOB stroller from REI, you can bring it back to any of the outdoor outfitter’s in-house repair service centers.