Greetings,

The car is 1984 W126 380SE, currently running on 225/50R16.
I need new tires but is confused as to what would be the correct/best size?

Tirerack website indicated 225/55R16, while manufacturer's site indicated either 225/50 or 215/55.

According to tire calculators found on this forum, 225/50 will result in a faster speedo, while 215/55R16 is the best match to stock 205/70R14. I also went to 3 tire shops today and all said 215/55 won't fit, "too tall", "will rub"

Which size should I go for? Since the rim rim is 16 x 7 ET37, would the added 12mm or so in diameter (if I go to 215/55) result in possible rubbing? Thanks in advance.

Curret wheel Overall Diameter is 635mm (as in Goodyear's brochure), while planned 215/55 OD is 647mm.