Review on Aozel Threaded American Locking Casters by Dan Deng

Nuts supplied with wheels appear to be metric. The wheel bolt conforms to the SAE standard. Attempting to install the nuts provided will damage the threads of the bolt and possibly break the bolt. This is factory QC surveillance. The bike feels solid and well built. Updated review: I just fitted a second set of wheels purchased at the same time as the previous set of wheels. This second set has SAE nuts in the box. The wheels are great and work well, although the manufacturer has some quality control issues. I would buy again. I have raised my rating to 4 stars.