Designed to be as engaging as possible, the Weehoo iGo Blast Bike Trailer comfortably hauls your kid while alleviating boredom and mid ride meltdowns. Its buckled strap and grippy handles secure your child as you pedal down cycling paths, backwoods trails, and city streets. The iGo Blast's well balanced, streamlined design promotes easy towing behind your bike, with a newly redesigned seat for tool free adjustments. It's ideal for kids one to four years old, safely carrying up to 80 pounds. Note, the Weehoo iGo Blast Bike Trailer attaches to most cylindrical seatposts, ranging from 25. 1mm to 31. 9mm.