From the manufacturer

Age 3+ 5+ 8+ 5+ 5+
Wheel Size Front: 4.7”; Back: 3.5” 4" 8" 4" 4"
Max Rider Weight 132 lbs 132 lbs 165 lbs 132 lbs 110 lbs
Adjustable Handle Bars Adjustable from 22.5” to 29.5” Adjustable from 20" to 29" Adjustable from 32" to 36" Adjustable from 26" to 31" Adjustable from 27" to 31.5"
Folding Mechanism Yes Yes Yes Yes Yes
Weight 7 lbs 6 lbs 10 lbs 5.7 lbs 6 lbs