Schwinn Mark III bike trailer

The Mark III is just below the Joyrider in Schwinn's hierarchy of bike trailer / stroller conversions. The size, weight, and features of the Mark III are essentially identical to the Schwinn Mark II but with one major exception: the Mark III comes with a 16" fixed front wheel kit, making it a functional jogging stroller in addition to its primary purpose as a bicycle trailer. The Mark III also comes with different fabric colors than other Schwinn bike trailers. 

Both the Schwinn Mark II and Mark III are lighter than the discontinued Mark I, utilizing a tough aluminum chassis with an 'outrigger' frame that protects the 20" pneumatic wheels from damage. These two trailers are virtually identical in their weight and dimensions, with the exception that the Mark III is heavier and longer when the 16" fixed front wheel is attached. Both these Schwinn bike trailers attach to bicycles with a simple universal coupler, and the conversion from bike trailer to jogging stroller requires no tools. A retractable, zippered rain shield covers the ventilated front canopy so your passengers or parcels don't get soaked.

Like all of Schwinn's bicycle trailers, the Mark III is back up by a limited 5-year warranty.

Bottom Line: Bike trailer / jogging stroller conversions are gaining popularity, though there are still only a few notable models on the market. The Schwinn Mark III is one of the most affordable convertible options currently available; some other convertible trailers cost twice as much or more. If your objective is a bike trailer / jogging stroller that won't damage your pocket, the Mark III will suit your needs . . . but don't expect a lot of frills like a suspension system or a padded seating area. If you would like to survey your convertible stroller options before buying, check out the Schwinn Joyrider or the Chariot Cheetah 2, two dual passenger trailers that are more expensive but packed to the gills with features and options.