The Roadrunner Mobility Base is a base for a child's car seat designed to convert the Snug Seat 2 or the Gorilla Car Seat (see separate entries) into a stroller. A moveable rear crossbar provides a choice of five fixed positions for tilt-in-space seating. FRAME (WxLxH): Folding tubular steel frame with a powder coat finish and a foam padded push handle. The frame is 26 x 31 x 40 inches open and 26 x 31 x 13 inches folded. The frame offers a choice of 94, 100, 106, 111, or 115 degrees of tilt. BRAKES: Foot-operated wheel locks are standard. CASTERS: 8 x 2 inch front casters with solid tires are standard. WHEELS: 8 x 2 inch rear wheels with solid tires are standard; pneumatic tires are optional. Also available are 12.5 x 2.25 inch or 20 x 1.75 inch rear wheels with solid or pneumatic tires, as well as quick-release axles. FOOTRESTS: Height-, depth-, and angle-adjustable footrests with ankle and toe straps are standard. OPTIONS: Smoked or clear plastic tray, oxygen bottle holder, ventilator tray, telescoping IV rod and holder, medical essentials bag, and a canopy. CAPACITY: 105 pounds. WEIGHT: 22 pounds with standard wheels.