BIKE USA Heavy-Duty Stabilizer Wheels for Adult Bicycles, The Original Training Aid for Full Size Bikes with a 24" to 27" Inch Wheel, Supports over 250 LBS, Patented Design, Black, 16-Inch (1000)

Several months ago we purchased a Townie 7d Electra for my wife. I bicycle frequently, she hadn't ridden for years; we hoped this could become a retirement activity for us. She has a partially amputated foot and wears a prosthetic brace. She just never could get comfortable on the bike; she fell almost once per outing, often due to tipping over when stopping. She suffered several minor injuries and her confidence fell to the point that it looked like the bike "experiment" was over. These wheels have saved the day. She now cycles with confidence, and can even stop to chat without dismounting. I think the set-up is every bit as good as if she were on a tricycle - and is probably lighter weight and more flexible regarding surfaces that can be ridden. There are some things to get used to, like turning (slow down for those turns!) and leaving room for the side wheel so that it doesn't run off the edge of the path or hit a curb, but these wheels are certainly serving their purpose, and are built well enough that they should last indefinitely.Now about installation - it will need to be done correctly; many customers be able to handle it, but if you are not, be prepared to spend an hours' labor (probably another $100 or so) at a good bike shop to get it done right. I'm a very experienced bike mechanic with a garage-shop full of tools. Installation took about 2 hours, to include grinding out divot in a portion of the plate that rests against the frame to allow for proper operation of the disk brake. I also used a dremel to round the inner side of several of the plastic spacers, this achieved proper spacer thickness for precise alignment of the wheels, with the added benefit of making a larger contact surface with the frame tubes. I note that with the plates installed as high as they would go I was only just able to achieve the 1/2 inch ground clearance on each side. Of course this will be different on every bike, but I see a posibility where some frames/some bicycle wheel sizes might not allow an installation high enough to keep the auxiliary wheels off the ground. The recommended 1/2 clearance seems to make for good riding characteristics; I see where some reviewers recommended more clearance, but I know the amount of tip the 1/2 in clearance allows is about as much as could be permitted without my wife becoming uncomfortable.Bottom line, a good product which, when properly installed, does just what it is supposed to do, and has kept my wife and me on the road together (or I should say bike trails, she's not up for traffic).

I think this is probably the most dangerous contraption I have ever rigged up, and I've rigged up a few. As soon as you start to turn the bike goes into a positive feedback cycle where it turns faster and faster and as a reflex you lean into the turn which puts more weight on the training wheel. You then tend to pedal harder which with the power from the ebike further contributes to the acceleration of the turn. Didn't make it 50 yards down our street withuot wiping out twice. Hobbled back just using the bike as a crutch.Now in fairness I was trying to use it with a single pedal clipped in because I can't put any weight on my second leg due to an injury, and I was thinking that these training wheels would allow me to come to a complete stop safely and get my boot cast over the top tube easily, and the ebike would provide enough power so I could just pedal with one foot as I currently do with a stationary bike trainer. But it was so hazardous to use I would never want to get up to speed with it. Maybe it works on very flat pavement but I'm not willing to give it a try because of the positive feedback on the turns.I am an avid biker generally riding about 70 miles a week prior to my injury and worked in a bike shop for some time and own and maintain a fleet of 8 bikes.The instillation is not trivial, particularly getting the wheels parallel to the back wheel. I needed to install additional shims to get the left side parallel. If you fully tighten the bolts you run a big risk of denting the chain stays as they are at an angle to the frame of the training wheels. I compensated for this by sanding the plastic shim supplied with the tip of a belt sander to make a groove that allows the shim to act as a wedge.To get the wheels 1/2" or the 3/4" off the ground (3/4" is recommended by some) the easiest way is to put a strip of appropriate thickness plywood under each training wheel. Be prepared to tighten and lPosen the unbolts multiple times before it's just right. Frankly, I would buy a tricycle instead, if you have balance issues, much less dangerous and you can get a cheap one for about the same price as these training wheels. These training wheels seem sturdily built, but are heavy. The wheels are cheap but sturdy.If you want to learn how to bike as an adult, do the time honored thing and have a friend run along side. If you have balance issues buy a trike