Instruct: Classify an Amazon review as either positive or negative.
Query: Be careful inflating

I bought 2 tires 2 weeks ago, it is ok if you put 75 psi, DO NOT PUT 90 psi, the tires will come off the rim and bust the tubes inside, I inflated to 90 psi, it didn't came off right away, after about an hour later when I came bake to ride the bike then I found out that tires came off the rim and 2 of my new tubes are busted.