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I have on my CB550K1 1975 Avon Roadriders. 3.25 front, 4.0 rear. I found them as very good tires, even when riding quite aggressive in the corners. No single slip. I can highly recommend them.
Here's a question. After having had Conti's* for decades, I now have Bridgestones BT45 and sofar (!) they're the best tyres I ever had on my bike. Now Bridgestone and Continental both prescribe relatively high tyre pressures compared to the pressures we find in our Owner's Manual for the then original tyres. Not until recently I have learned that Metzelers have a lower advised tyre pressure than Continental and the BT45s. Now the CB500 is not particularly known for its comfort; to today's standards, it is quite a spartan ride. Could it be that the Metzelers with their lower tyre pressure, would therefore have been a better choice for someone who wants comfort or am I fooling my self here and do other factors like rubber compound play a dominant role? * Several K112 rear and RB2 front and later TK44 and TK22.