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
The stock (OEM) tire size for a 1998 Chevrolet Tahoe is 245/75R16.
245/55r16
245/65R17
245/60/16
245-75-16
245/60/16