16" to 20" Steel #252

I did not measure my bike's frame tube before getting this. Big mistake because they turned out to be a bit too fat for these. But these are super sturdy compared to the previous training wheels I have. There is another version of this for wider frame tubes so you might want to look into that one if your bike is like mine.

The training wheel's stability brackets did not fit any 20 inch bike that I had. We have three different mfgs and the frames were too large. No big deal for me since I have a grinder, but anyone without tools, this will be an issue. Once installed, it's very sturdy and my boy was off riding.

The training wheels came and I installed them, and they've worked ever since. I did run into a little bit of difficulty with the installation because my daughter's bicycle is a stingray design. Therefore, the banana seat is supported at the back by two posts that are attached to the axle. The length of the axle is limited, so that didn't leave a lot of room to attach the training wheels (and braces) as well. I was able to do it though. One of the training wheels and braces went on without any problem. On the other side though, I was only able to attach the training wheel (not the brace) due to the insufficient length of the axle. I tightened the nut really good though, and the wheel works fine even without the brace.

These training wheels are sturdy and do not bend. My daughter is almost 8 and on a 20" bike. My husband installed them so they don't touch the ground when she is completely balanced so that she can work on not needing them. She's been doing great and her balance is getting stronger. They help give her confidence. These training wheels are well made. Skip the junk and buy these.

These are so awesome! The training wheels that came on my daughter's bike kept needing constant adjustment, so I decided to try these instead. These are the real deal. They stay in place, are easy to install, and work really well. If you need training wheels, forget about the other brands and just buy these! You won't regret it!

only fit certain bikes ,did not fit my sons new bike

Good, very sturdy set of training wheels. May be a bit awkward to install on some bikes, but worked just fine for us when I was retrofitting an older bike for the next generation of grandchild. Don't forget the helmet…

These wheels are very study and they're well made.My grand daughter, who was a little squeamish with the ones that came on her bike, had no trouble riding her bike with these. The only issue we had was they are thick, so we had to adjust the axel a bit to fit them on the bolt. But she took off right away and she hasn't stopped since! Well...maybe just to eat and sleep!