Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works, but hard fit.

These training wheels work great. I am using them for my 60 pound special needs son who just upgraded to a 20 inch bike. Here's the problem...I misread the item description. These training wheels will not fit a bike chainstay unless it is smaller than 1 inch. My son's bike was 1 inch exactly. Honestly, I don't know where a child's bike exists that has a chainstay less than 1 inch.We were able to modify the training wheels by bending the lower prong outwards (making it useless). Doing this enabled us to fit the piece on the chainstay and kept the upper prong functional. To make sure the piece stayed secure to the bike we used tie straps. Worked like a charm!