Before the advent of professional bicycle tune-ups, gangs of riders often raided travelling carnivals for small wrenches and hand balloon pumps. Maintain your wheels without collateral clown damage with today's Groupon: for $25, you get a full bicycle tune-up (a $50 value) at Bike Universe on Broadway Avenue.

Bike Universe is a full-service repair shop and purveyor of high-performance outdoor sports equipment. A bicycle's first tune-up refurbishes rides with adjustment of brakes, gears, hubs, wheel alignment, bottom bracket, and headset. The service also lubricates two-wheeled companions and injects life-giving air into tired tires, granting rides the confidence to stand up to the bullying of pavement.