Put new shoes, I mean tires on TourX

Zeroboostbuick

Well-known member
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S.W. Ontario Canada
Buick Ownership
2018 Regal Sportback - 2010 Yamaha R6 (track bike) Past cars: 92 LeSabre, 98 Regal, 02 GrandPrixGT
255-45-18 is 2.3% smaller in diameter than 235-50-18 assuming both are mounted on a 8" rim.

This translates to very little in the real world... at 60 mph the speedo would read 61 mph with the new tires.
 
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