Of course you can but the question is should you? The answer is no, this a a bad swap. You should never change the overall diameter by more than 3% and the 275 is 3.51% larger in overall diameter. This will cause your speedometer to read 57.8 at a true 60 mph. This will have an adverse effect on fuel mileage braking and handling. If you wish to go to a larger tire such as a 275 then you need to go with size 275/60-15. This is an excellent swap and is almost identical to the 255/65-15 in overall diameter. Just make sure you have no clearance issues when turning.
No, this is a bad swap. If you want to go with a 65 series tire then install a 275/65-15 which is almost identical in overall diameter.
235/65-15 or 275/75-15 are very good substitutes.
Have not seen a 15" tire in size 275/65-15. But if you can find one it will work pretty well.
275 divided by 65 = 4.2 hours = 4 hours 15 minutes
A 235/70-16 or 275/60-16 would both be a good replacements depending on which way you want to go. I you go with the 275/60-16 just make sure you have good clearance and the tire does not rub when making a sharp turn.
255/65 = 3hours 55minutes 23.1seconds (rounded)
You can but, the speedometer and odometer won't be acturate and your mpg will drop.
205/60-15 or 175/70-15
178.75
NO. Rim size incorrect, they will not fit.
Yes, that is a good swap.
Absolutely not as you are going in the wrong direction. This would be a horrible substitute. The 235 tire would be 11.7% smaller in overall diameter. Your speedometer would read 68 mph at a true 60 mph. Handling, braking, ride, and fuel mileage would suffer. If you wish to switch to a 65 series tire then you will have to go with a 275/65-15. But I highly recommend you do not go with a 65 series tire from a 75 series. I recommend you go with a 70 series tire in the size 255/70-15 which will work well.