woom has been engineering kids' bikes from the ground up since 2013, not shrinking adult designs, but building from a child's actual proportions and strength. The Explore 4 is that philosophy made real: hydraulic disc brakes that stop reliably without a white-knuckle squeeze, a Shimano 7-speed drivetrain kids can shift intuitively, and Schwalbe all-terrain tires that handle pavement, gravel, and dirt trails with equal confidence. The adjustable stem and Abc fit guide take the guesswork out of sizing as your rider grows. Heads up - We do our best to keep bike specs and images current, but occasional component changes can happen without warning-and sometimes the photos might not show the exact build you'll receive. If you want to double-check the details, our Gearheads are always here to help.