DETAILS Patented, push-button locking system (ABS material). Automotive grade ABS plastic tubular handle. 5" roller bearing, rubber wheels. Raised chrome plated solid steel raised wire platform. Chrome plated solid steel wheel guards to protect loads. Chrome plated steel wire, curb/stair slides. Chrome plated, solid steel sliding base lock. Adjustable lock permanently attached on elastic cords to prevent load shifitng. Weight capacity: 225 lbs. Overall dimensions: Height: 45.5"; Base: 9" x 15.5" Storage dimensions: Height: 21.5"; Width: 15.5"; Depth: 5.5" Weight: 10.25 lbs. OPTIONAL: conversion kit to Tri-Kart 750. OPTIONAL: Innovative design allows incorporation of optional extended rubber grip bike handle.