B0F2LT3LDL [**Compatibility Check**] To fit correctly on your bike, please check your bike's rear axle studs have at least 3/4" (0.75"/19mm) of exposed length. Additionally, the model you are currently browsing is for 20-inch, single-speed bikes. Please measure your bike size to avoid buying wrong. If both above are met, then you can pick this training wheels for 20 bike with full assurance! [Ultra-Sturdy Brackets] As the most robust bracket ever, crafted from military-high-strength steel via -piece precision stamping, our heavy duty training wheels brackets up to 1,064 lbs per side (5 adults). Larger, wider, and thicker, provide long-term durability for children's safe riding. Your kid will no longer fear bending, wobbling or falling [Dual Anti-Tip Protection] Tailored for different bike sizes separately, each size of our training wheels features a scientifically calibrated best lateral extension to maximize and stability. Paired with 1.7-inch ultra-wide tires, will effectively prevent tipping over during turns or bumps, giving incomparable confident riding experience [Dual Anti-Loss Protection] To better withstand nut loosening caused by long-term road vibration and impact, we use enlarged washers and deepened nuts with built-in elastic nylon. They will deform when tightened for a snug fit, greatly increasing friction and ensuring a firm lock—eliminating the risk of injuries due to wheels falling off [Triple Noise-Reduction Design] To avoid disturbing your neighbors while riding in the block, we equipped each wheel with a soft 85A PU tire and premium ABEC-7 mute bearings to minimize abrasive sounds. A honeycomb hub absorbs low-frequency hum, while a sealed hubcap further blocks the rumble. Cutting the noise of the bike training wheels by 60% for a hassle-quite ride anytime! [Learn to Ride Easily] The 5 holes adjustable design (5mm/0.2inch increments per stage) simplifies installation and height alignment. By progressively increasing ground clearance, the will feel more secure and naturally adapt to riding with less . Helping them effortlessly and joyously develop true balance skills step-by-step [Brighter Fun at Night] We’ve specially upgraded the popular beloved glowing wheels with an unprecedented 900 turns of high-sensitivity coils, delivering dazzling light with 2x brightness at night. -powered and battery-. As an exciting gift choice, it will turn the brilliant light show into an unforgettable childhood memory for your little rider! [For Further Safety] Also a bike mirror to attachto the left handlebar, allowing the to notice the traffic coming behind. Its multi-axis bracket and convex lenses provide a wide field of view covering all lanes. Additionally, the lens is specially made from unbreakable acrylic, eliminating any risk of eye injury to children [Trusted by Parents Worldwide] has empowered over 2 million families across 20 countries as an experienced manufacturer of ' bike . Our training wheel come with all required tools and easy-to-illustrated instructions. Allows a 5-minute DIY with your to enjoy the bonding experience.