Greetings to all. I have a 1974 ST 90 with 1500 miles on it. My dilemma is this. I very rarely off road this bike. I need to replace the tires due to dry rot on the sidewalls. I have installed a Dr ATV lift kit on it which I really like. I don’t need knobbies or aggressive tread tires. What is the widest metric sized street tire that would fit this bike on original rims? Thanks in advance for any replies.