Revvi 12" Electric Bike & Riding Gear Bundle Blue Revvi Kids Riding Jersey Blue (Size):AGE 2 Is the Revvi 16 XL Is the Revvi 16 XL Right for Your Rider Feature RFN Thunder 70 Smaller Bikes RFN Thunder 110 Pro Engine Smaller beginner focused engine FH 110cc 4 stroke engine Gearbox Simpler beginner setup 4 speed semi automatic — no clutch lever Wheel Setup Smaller junior sizing 14 inch front 12 inch rear Brakes Lighter beginner braking package Hydraulic front and rear disc brakes Best For Younger riders starting out Riders ready for more power Safety First It is often chosen as a child's first electric bike and is ideal for building confidence before progressing onto larger models