ZacroBike Training Wheels Mute Flash Wheels with Adjustable Bicycle Axle Extenders Bolt, Training Wheels for 12 14 16 18 20 inch Kids Bike, Universal Kid Toddler Bicycle Training Wheels with Bell

Worth getting fornypur daughter or niece. I must advise though. The stars do not fit on rim spokes . Will only clip onto a thinker spoke or pole . I found they fit best on the rain guard poles

Instructions weren't great but my husband is handy so he got it done. Love how they light up.

Doesn't support much weight. Bent out of shape in first ride. Very difficult to install. Wheels didn't light up as advertised.

I ordered this set to go on a geared bike with a derailleur, so the extenders were required for installation. Not only are the extenders not explained in the instructions (along with what appear to be additional braces), but the interior threading on the extenders were messed up about halfway down the extenders, so they wouldn’t fit all the way over the bike’s bolt. It created a dangerous arrangement on the bike and made it soffits confirm because the instructions did not address them. I thought the problem was me and took it to a skilled bike shop. They confirmed the defect in the product. I got these trailing wheels for a birthday bike and spent hours messing with installation, only to give my daughter a bike she can’t ride yet. It was infuriating and disappointing. Returning them. Wish there had been some quality control.

Excelente material, le encantó a mi hija para su bici

Small print

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My daughter has only tested these training wheels in the garage (it was raining today), and they seem stable. The bell, wheel spoke stars and tassels are a nice touch, though the tassels and stars are already starting to fall off, while the bell is of good quality. The instructions were incomplete; I had to rely on review photos to figure out how to attach the second metal piece (stabilizing extender see photo). Some parts were missing (no washers), and there were random extra extenders. Luckily, I had the right wrench to hold one bolt end while tightening the other. I had to use some extra bolts to attach to our bike The assembly process was definitely not straightforward via direction included. If I don't update this review, it means my daughter loves them. Note if wondering “height” these are suitable for a bike height for an average 7-10 year-old.