The top three most efficient modes of human-powered transportation are (in no particular order): Flintstone cars, bicycles, and a palanquin carried by the various monarchs you've conquered and overthrown. Make sure the most feasible of these is in perfect working order with today's Groupon to The Bike Shop at Las Colinas in Irving. Choose between the following options:

• For $20, you get a 10-hour bike rental (up to a $44.99 value).
• For $25, you get a basic bike tune-up (up to a $49.99 value).

The Bike Shop at Las Colinas capitalizes on its proximity to the Irving trails, offering riders of all stripes top-notch repairs and sturdy rentals. The shop’s pedaling buffs check over any manner of bike during the basic tune-up, ensuring primary components run as smoothly as a marathoner doused in olive oil. Brake and gear adjustments keep cyclists stopping and climbing with ease, and drive-train lubrication keeps cassette teeth from chewing on the chain too loudly. A light wheel truing smacks straying spokes back into their proper place, and a final safety check ensures that bicycles won’t knock their riders off to go chasing after squirrels.

To assist bikeless wheeling warriors on their exploratory and exercise quests, the shop loans out portions of its quality bike fleet. Comfort hybrids, cruisers, and mountain bikes enable riders to roll solo in style, while tandem bikes offer valuable lessons in teamwork. Bike rental also provides an ideal way to try on different styles of bikes for patrons looking to upgrade their penny-farthings.

Though The Bike Shop at Las Colinas sometimes features a discounted price online, this Groupon still offers the best deal available.