I've looked all over my rim and all I could find was 584x19 and where it was manufactured. Looking it up on the website it's just referred to as Giant Alloy Double Wall. On the tire it currently has a Giant Sport 2.1 that will need replacing. Upon using the search bar on the forum and googling, nothing is coming up with relevant information. Are the rims worth upgrading? No weight or reliability reviews on it are popping up. If they are solid rims worth keeping, what is the widest tire available for it and what sort of PSI should I be running weighing 120? Wheel set has been untouched so still running tube.