This is a three-position training wheel system, with tool-less installation and removal, so you're always the hero without so much as a screwdriver. Reinforcing this, the tubular steel arms are built to take a beating, while the foam tires will never go flat.
-Tool-less, 3-position training wheel installation/removal system.
-Closed-cell foam tires.
-Tubular steel arms.
-Compatible with 2013+ Specialized 16-inch models