zosen training wheels bicycle stabilizers for kids bike support rear wheels for 12 14 16 18 20 inch kids bicycle zosen <b>how to install bike training wheels?</b><br> -step 1: connecting the training wheel and support bar together. first assemble the bolt, wheel, gasket, bracket arm and nut in order and then fix them by wrench. <br> -step 2: unscrew the bicycle rear axle nut, then fix the stop block, fasten the pointed horn of stop block on the bike frame. <br> -step 3: according the size of bike or wheel, choose the proper hole location on the support bar. fix them with nut by slightly press strength. <br> -step 4: using the same way to install the training wheel of the other side. in order to install it smoothly, please screw in press strength.<br><br> <b>feature:</b><br> - give them the best start to gain their balance and confidence on two wheels with this pair of universal fitting training wheels.<br> -suitable for most 12 to 20 inch children's bicycles, the rear axle has a length of more than 1cm as the installation location. (works only with hub gears, not compatible with the gear shifted bike)<br> - durable and sturdy, 2.5cm wide rubber tire for extra stability and safety.<br> - excellent quality training wheels at a great price. <br> - robust metal components and construction.<br> - comes with all fixtures and fittings, easy diy assembly.<br><br> <b>specification:</b><br> -material: steel + plastics + rubber<br> -color: black<br> -size:<br> wheel: 4.33 inch*4.33 inch*0.98 inch /11cm *11cm*2.5cm<br> bracket arms: 10 inch*1.1 inch / 25.4cm*2.8cm<br> -fit: 12/ 14/ 16/ 18/ 20 inch bicycles<br><br> <b>note: this product is not suitable for change-speed bicycles. please check carefully before purchasing to determine if your bicycle is suitable for our products.</b><br><br> <b>package includes:</b><br> 2 wheels<br> 2 bracket arms<br> 2 shoulder bolts<br> 2 locking nuts<br> 2 stop blocks<br> 2 gaskets<br>