12-Inch Inner Tubes for Kids Bikes and Trikes Don\'t let a perfectly working road bike, balance bike, or trike go to waste. We offer replacement inner tubes for almost all sizes and types of bikes so can rest easy knowing that you\'ll have a dependable source for high-quality and durable replacement inner tubes. Give your toddler a good start in bicycle riding with 12-inch bikes that are made more comfortable and efficient by our 12-inch x 2.125-inch inner tubes. Whether it be a jogging stroller or a steerable bike, our inner tubes will be your dependable aid. Superior-Quality Inner Tubes Pneumatic tires are only as good as their inner tubes. The CalPalmy 12 x 1.75/1.95/2.125 Kids Bike Replacement Inner Tubes offer clear advantages on quality and performance. Thicker, stronger, and more durable than average inner tubes, these inner tubes offer superior shock and vibration dampening, tear-resistance, wear-resistance, aging-resistance. Ride comfortably, as these inner tubes allow you to feel like gliding over rough and bumpy spots. And for toddlers experiencing their first foray into riding bikes, the comfort and safety of these inner tubes will contribute to the wonderful memories they\'ll have of this time. Ride Longer and Safer with OurHEAVY DUTY Inner Tubes Glass shards, sharp rocks, and thorns are the bane of bike tires and inner tubes. Don\'t let these little obstacles bring injury to you, too. Explosive punctures should be a thing of the past. With these HEAVY DUTY inner tubes, punctures will cause an airtight seal to form around the puncture\'s perimeter to prevent rapid air loss and give the rider time ample time to stop and patch up the damage. Over-inflation explosions are especially problematic with thinner tubes as they can\'t withstand even a little extra pressure. CalPalmy\'s inner tubes, on the other hand, have thicker and evenly-molded butyl rubber walls that are designed to hold extra pressure and weight.