As spring spreads like spilled gravy over the land, hibernating bicycles slowly awaken and emerge from the undergrowth, shy and stiff with sleep. Help your own bicycle bosom buddy rise and shine with today's Groupon to Urban AdvenTours. Choose from the following options:

• For $32, you get a basic bike tune-up (a $64.99 value).
• For $25, you get a city view bicycle tour (a $50 value).
• For $18, you get a hybrid bike rental (a $35 value).

Urban AdvenTours' team of bicycle experts leads tours through the historic and scenic neighborhoods of Boston and rents out and tunes up two-wheeled vehicles. The city view bicycle tour treats riders' eyes to views of the storied city, from North End and Beacon Hill to Fenway Park and through Back Bay. Urban AdvenTours' guides leverage their deep knowledge of the city and bicycles to answer questions and render each tour smooth and exhilarating, like a trip down a freshly sandpapered wooden slide. Each 2.5- to 3-hour-long tour includes a bike, helmet, and water, and covers 10 to 12 miles.

Bring in a banana-seated gem for a basic tune-up, which restores hail-plagued pedal machines with a quick clean and lube treatment, as well as brake, derailleurs, headset, hubs, and bottom bracket adjustments, or rent a hybrid bike, such as Giant Escapes, Kona Smokes, and Specialized Globes, for a day. The rental includes a lock, helmet, and map of Boston's hidden treasures, such as the house where Paul Revere stored his business cards.