Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Doesn't fit my Specialized Rockhopper

Bought it for a 23" frame 2007 Specialized Rockhopper. Unfortunately, the rubber insert that expands in the front fork stem to hold the fender on is too small for the hole in my bike's stem. I couldn't find any way to make this fender work and gave up on it. I gave it two stars because the construction seems OK, and it might be fine if it actually fits your bike.