can i replace a p255/60 r15 with a p215/70 r15
60% of 255= 60% * 255= 0.6 * 255= 153
Probably not because of the rim width. The 255 is a wider tire.
Not unless you change the aspect ratio. For instance: If you have a 215/70-15 tire and you replace it with a 255/70-15 this would be a horrible swap as the 255/70-15 would be 7.58% larger in overall diameter. It is never advisable to go over 3% difference in size. Besides your speedometer would read 55.4 at a true 60 mph. If you want to install a 255 tire you will need to install a 255/60-15 to replace a 215/70-15 which is an excellent swap.
Yes, this is a decent swap. If your OEM size was 235/50-18 and you substitute 225/55-18 your speedometer will read 58.9 at a true 60 mph.
what is the diameter difference from a 205/65/16 vs. 225/60/16
60 minutes in an hour 55/60 Numerator = 55 denominator = 60 55/60 = 11/12
Yes, this is a decent swap. If your OEM size was 235/50-18 and you substitute 225/55-18 your speedometer will read 58.9 at a true 60 mph.
55 out of 60 is a 91.67% (A)
55% of 60 is 33
255 = 60 + 60 + 60 + 60 + 15
55% of 60 = 60*55/100 = 3300/100 = 33