Tire sizes for 77 GS550

SmugMonkey

New Member
Apologies if this has been covered to death, my google-fu is weak.

What size tires do I need for this stupid thing? Stock were 3.25x19 front and 3.75x18 rear. How do you convert that? I've seen a lot of conversion charts that say that works out to a 90x19 front and 110x18 rear, but Pirelli (who has the only search by vehicle that I've found so far) says I need 100x19 front and 110x18 rear.

Oh, and what's your favorite tire for a classic(ish) UJM?
 
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