The first bicycles had no brakes, meaning riders could only stop by throwing a 50-pound anchor off their shoulder. Keep contemporary brakes stopping properly with today’s Groupon: for $39, you get a basic bike tune-up at Mox Multisport (an $80 value).

Winner of the Best Bike Shop/Tri Shop award in Competitor magazine, Mox Multisport outfits cyclists and triathletes with competitive gear and primes these indefatigable warriors with a finely tuned machine. The basic tune-up runs two-wheeled people-powered machines through a six-point inspection, adjusting brakes, checking torque, and scaring away any hiccups when shifting gears. The techs clean the entire frame and remove the drive train, scouring debris and grease accumulated from treks through fields of bacon. Finally, to eliminate worrisome wobbling, both wheels are trued.

Groupon customers also receive 15% off any store purchase, which they may use while perusing Mox Multisport’s bicycles, wetsuits, and other gear suspended along exposed brick walls. The staff sincerely seeks to pair athletes with the equipment they need to succeed, fostering a community of likeminded tri-sport athletes with their cycling teams and weekly training rides.