Without you telling us the entire number, we can't say ! - Speed code is at end of the full number
P235/55r16 If you have a Z 28 with the 6 speed, the tire size is 245/50ZR16
Doubtful, since the radial is bigger on the r17...
tire size is 245/70sr17
There were two original tire sizes for this car. 245/70R16 245/75R16
245/70r16
245/70/17 Most models come with 245/65R17
245/65R17
245/60/16
245/55r16
The stock (OEM) tire size for a 1998 Chevrolet Tahoe is 245/75R16.
To find the height difference between a 245/75R16 and a 245/70R16 tire, we need to calculate their overall diameters. The formula for the overall diameter is: (section width × aspect ratio × 2 / 25.4) + wheel diameter. For the 245/75 tire, the diameter is approximately 30.5 inches, while for the 245/70 tire, it’s about 29.5 inches. Therefore, the 245/75R16 tire is about 1 inch taller than the 245/70R16 tire.
255 mm wide versus 245 mm wide. Can not answer for height since the second tire you listed as a 0 for the next number. The second number in a tire size is the aspect ratio of the side wall. If it is 65, that means the side wall is 65% of 255mm in height.